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Kieffer C, Primas N, Hutter S, Merckx A, Reininger L, Bach S, Ruchaud S, Gaillard F, Laget M, Amrane D, Hervé L, Castera-Ducros C, Renault J, Dumètre A, Rault S, Doerig C, Rathelot P, Vanelle P, Azas N, Verhaeghe P. Target fishing reveals PfPYK-1 and PfRab6 as potential targets of an antiplasmodial 4-anilino-2-trichloromethylquinazoline hit compound. Bioorg Med Chem 2024; 102:117654. [PMID: 38452406 DOI: 10.1016/j.bmc.2024.117654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/22/2024] [Accepted: 02/22/2024] [Indexed: 03/09/2024]
Abstract
We present investigations about the mechanism of action of a previously reported 4-anilino-2-trichloromethylquinazoline antiplasmodial hit-compound (Hit A), which did not share a common mechanism of action with established commercial antimalarials and presented a stage-specific effect on the erythrocytic cycle of P. falciparum at 8 < t < 16 h. The target of Hit A was searched by immobilising the molecule on a solid support via a linker and performing affinity chromatography on a plasmodial lysate. Several anchoring positions of the linker (6,7 and 3') and PEG-type linkers were assessed, to obtain a linked-hit molecule displaying in vitro antiplasmodial activity similar to that of unmodified Hit A. This allowed us to identify the PfPYK-1 kinase and the PfRab6 GTP-ase as potential targets of Hit A.
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Affiliation(s)
- C Kieffer
- Normandie Univ, UNICAEN, CERMN, 14000 Caen, France
| | - N Primas
- Aix Marseille Univ, CNRS, ICR UMR 7273, Equipe Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Marseille, France; AP-HM, Service Central de la Qualité et de l'Information Pharmaceutiques, Hôpital Conception, Marseille 13005, France
| | - S Hutter
- Aix Marseille Univ, IHU Méditerranée Infection, UMR VITROME, IRD, SSA, Mycology & Tropical Eucaryotic Pathogens, Marseille, France
| | - A Merckx
- Université Paris Cité, MERIT, IRD, Paris, France
| | - L Reininger
- Sorbonne Université, CNRS, UMR8227, Integrative Biology of Marine Models Laboratory (LBI2M), Station Biologique de Roscoff, 29680 Roscoff, France; Sorbonne Université, CNRS, FR2424, Plateforme de criblage KISSf (Kinase Inhibitor Specialized Screening Facility), Station Biologique de Roscoff, 29680 Roscoff, France
| | - S Bach
- Sorbonne Université, CNRS, UMR8227, Integrative Biology of Marine Models Laboratory (LBI2M), Station Biologique de Roscoff, 29680 Roscoff, France; Sorbonne Université, CNRS, FR2424, Plateforme de criblage KISSf (Kinase Inhibitor Specialized Screening Facility), Station Biologique de Roscoff, 29680 Roscoff, France
| | - S Ruchaud
- Sorbonne Université, CNRS, UMR8227, Integrative Biology of Marine Models Laboratory (LBI2M), Station Biologique de Roscoff, 29680 Roscoff, France; Sorbonne Université, CNRS, FR2424, Plateforme de criblage KISSf (Kinase Inhibitor Specialized Screening Facility), Station Biologique de Roscoff, 29680 Roscoff, France
| | - F Gaillard
- Sorbonne Université, CNRS, UMR8227, Integrative Biology of Marine Models Laboratory (LBI2M), Station Biologique de Roscoff, 29680 Roscoff, France; Sorbonne Université, CNRS, FR2424, Plateforme de criblage KISSf (Kinase Inhibitor Specialized Screening Facility), Station Biologique de Roscoff, 29680 Roscoff, France
| | - M Laget
- Aix Marseille Univ, INSERMN, SSA, MCT, Marseille, France
| | - D Amrane
- Aix Marseille Univ, CNRS, ICR UMR 7273, Equipe Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Marseille, France
| | - L Hervé
- Université Paris Cité, MERIT, IRD, Paris, France
| | - C Castera-Ducros
- Aix Marseille Univ, CNRS, ICR UMR 7273, Equipe Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Marseille, France; AP-HM, Service Central de la Qualité et de l'Information Pharmaceutiques, Hôpital Conception, Marseille 13005, France
| | - J Renault
- Université de Rennes - Faculté de Pharmacie, ISCR UMR CNRS 6226, Equipe CORINT, Rennes, France
| | - A Dumètre
- Aix Marseille Univ, IHU Méditerranée Infection, UMR VITROME, IRD, SSA, Mycology & Tropical Eucaryotic Pathogens, Marseille, France
| | - S Rault
- Normandie Univ, UNICAEN, CERMN, 14000 Caen, France
| | - C Doerig
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC 3083, Australia
| | - P Rathelot
- Aix Marseille Univ, CNRS, ICR UMR 7273, Equipe Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Marseille, France; AP-HM, Service Central de la Qualité et de l'Information Pharmaceutiques, Hôpital Conception, Marseille 13005, France
| | - P Vanelle
- Aix Marseille Univ, CNRS, ICR UMR 7273, Equipe Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Marseille, France; AP-HM, Service Central de la Qualité et de l'Information Pharmaceutiques, Hôpital Conception, Marseille 13005, France
| | - N Azas
- Aix Marseille Univ, IHU Méditerranée Infection, UMR VITROME, IRD, SSA, Mycology & Tropical Eucaryotic Pathogens, Marseille, France.
| | - P Verhaeghe
- Univ. Grenoble Alpes, CNRS, DPM UMR 5063, F-38041 Grenoble, France; LCC-CNRS Université de Toulouse, CNRS, UPS, Toulouse, France; Service de Pharmacie, CHU de Nîmes, Place R. Debré, Nîmes, France.
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Jones JJ, Jones KL, Wong SQ, Whittle J, Goode D, Nguyen H, Iaria J, Stylli S, Towner J, Pieters T, Gaillard F, Kaye AH, Drummond KJ, Morokoff AP. Plasma ctDNA enables early detection of temozolomide resistance mutations in glioma. Neurooncol Adv 2024; 6:vdae041. [PMID: 38596716 PMCID: PMC11003533 DOI: 10.1093/noajnl/vdae041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024] Open
Abstract
Background Liquid biopsy based on circulating tumor DNA (ctDNA) is a novel tool in clinical oncology, however, its use has been limited in glioma to date, due to low levels of ctDNA. In this study, we aimed to demonstrate that sequencing techniques optimized for liquid biopsy in glioma patients can detect ctDNA in plasma with high sensitivity and with potential clinical utility. Methods We investigated 10 glioma patients with tumor tissue available from at least 2 surgical operations, who had 49 longitudinally collected plasma samples available for analysis. Plasma samples were sequenced with CAPP-seq (AVENIO) and tissue samples with TSO500. Results Glioma-derived ctDNA mutations were detected in 93.8% of plasma samples. 25% of all mutations detected were observed in plasma only. Mutations of the mismatch repair (MMR) genes MSH2 and MSH6 were the most frequent circulating gene alterations seen after temozolomide treatment and were frequently observed to appear in plasma prior to their appearance in tumor tissue at the time of surgery for recurrence. Conclusions This pilot study suggests that plasma ctDNA in glioma is feasible and may provide sensitive and complementary information to tissue biopsy. Furthermore, plasma ctDNA detection of new MMR gene mutations not present in the initial tissue biopsy may provide an early indication of the development of chemotherapy resistance. Additional clinical validation in larger cohorts is needed.
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Affiliation(s)
- Jordan J Jones
- Department of Surgery, University of Melbourne, Melbourne, Victoria, Australia
- Department of Neurosurgery, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Kate L Jones
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - Stephen Q Wong
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - James Whittle
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - David Goode
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - Hong Nguyen
- Department of Surgery, University of Melbourne, Melbourne, Victoria, Australia
| | - Josie Iaria
- Department of Surgery, University of Melbourne, Melbourne, Victoria, Australia
| | - Stan Stylli
- Department of Surgery, University of Melbourne, Melbourne, Victoria, Australia
- Department of Neurosurgery, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - James Towner
- Department of Neurosurgery, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Thomas Pieters
- Department of Neurosurgery, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Frank Gaillard
- Department of Radiology, University of Melbourne, Melbourne, Victoria, Australia
| | - Andrew H Kaye
- Department of Surgery, University of Melbourne, Melbourne, Victoria, Australia
- Department of Neurosurgery, Hadassah Hebrew University Hospital, Jerusalem, Israel
| | - Kate J Drummond
- Department of Surgery, University of Melbourne, Melbourne, Victoria, Australia
- Department of Neurosurgery, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Andrew P Morokoff
- Department of Surgery, University of Melbourne, Melbourne, Victoria, Australia
- Department of Neurosurgery, Royal Melbourne Hospital, Melbourne, Victoria, Australia
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Jones JJ, Nguyen H, Wong SQ, Whittle J, Iaria J, Stylli S, Towner J, Pieters T, Gaillard F, Kaye AH, Drummond KJ, Morokoff AP. Plasma ctDNA liquid biopsy of IDH1, TERTp, and EGFRvIII mutations in glioma. Neurooncol Adv 2024; 6:vdae027. [PMID: 38572065 PMCID: PMC10989869 DOI: 10.1093/noajnl/vdae027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024] Open
Abstract
Background Circulating tumor DNA has emerging clinical applications in several cancers; however, previous studies have shown low sensitivity in glioma. We investigated if 3 key glioma gene mutations IDH1, TERTp, and EGFRvIII could be reliably detected in plasma by droplet digital polymerase chain reaction (ddPCR) thereby demonstrating the potential of this technique for glioma liquid biopsy. Methods We analyzed 110 glioma patients from our biobank with a total of 359 plasma samples (median 4 samples per patient). DNA was isolated from plasma and analyzed for IDH1, TERTp, and EGFRvIII mutations using ddPCR. Results Total cfDNA was significantly associated with tumor grade, tumor volume, and both overall and progression-free survival for all gliomas as well as the grade 4 glioblastoma subgroup, but was not reliably associated with changes in tumor volume/progression during the patients' postoperative time course. IDH1 mutation was detected with 84% overall sensitivity across all plasma samples and 77% in the preoperative samples alone; however, IDH1 mutation plasma levels were not associated with tumor progression or survival. IDH1m plasma levels were not associated with pre- or postsurgery progression or survival. The TERTp C228T mutation was detected in the plasma ctDNA in 88% but the C250T variant in only 49% of samples. The EGFRvIII mutation was detected in plasma in 5 out of 7 patients (71%) with tissue EGFRvIII mutations in tumor tissue. Conclusions Plasma ctDNA mutations detected with ddPCR provide excellent diagnostic sensitivity for IDH1, TERTp-C228T, and EGFRvIII mutations in glioma patients. Total cfDNA may also assist with prognostic information. Further studies are needed to validate these findings and the clinical role of ctDNA in glioma.
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Affiliation(s)
- Jordan J Jones
- Department of Surgery, University of Melbourne, Victoria, Australia
- Department of Neurosurgery, Royal Melbourne Hospital, Victoria, Australia
| | - Hong Nguyen
- Department of Surgery, University of Melbourne, Victoria, Australia
| | | | | | - Josie Iaria
- Department of Surgery, University of Melbourne, Victoria, Australia
| | - Stanley Stylli
- Department of Surgery, University of Melbourne, Victoria, Australia
| | - James Towner
- Department of Neurosurgery, Royal Melbourne Hospital, Victoria, Australia
| | - Thomas Pieters
- Department of Neurosurgery, Royal Melbourne Hospital, Victoria, Australia
| | - Frank Gaillard
- Department of Radiology, University of Melbourne, Victoria, Australia
| | - Andrew H Kaye
- Department of Surgery, University of Melbourne, Victoria, Australia
- Department of Neurosurgery, Royal Melbourne Hospital, Victoria, Australia
| | - Katharine J Drummond
- Department of Surgery, University of Melbourne, Victoria, Australia
- Department of Neurosurgery, Royal Melbourne Hospital, Victoria, Australia
| | - Andrew P Morokoff
- Department of Surgery, University of Melbourne, Victoria, Australia
- Department of Neurosurgery, Royal Melbourne Hospital, Victoria, Australia
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Lasocki A, Roberts-Thomson SJ, Gaillard F. Radiogenomics of adult intracranial gliomas after the 2021 World Health Organisation classification: a review of changes, challenges and opportunities. Quant Imaging Med Surg 2023; 13:7572-7581. [PMID: 37969636 PMCID: PMC10644132 DOI: 10.21037/qims-22-1365] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 03/29/2023] [Indexed: 11/17/2023]
Abstract
The classification of diffuse gliomas has undergone substantial changes over the last decade, starting with the 2016 World Health Organisation (WHO) classification, which introduced the importance of molecular markers for glioma diagnosis, in particular, isocitrate dehydrogenase (IDH) status and 1p/19-codeletion. This has spurred research into the correlation of imaging features with the key molecular markers, known as "radiogenomics" or "imaging genomics". Radiogenomics has a variety of possible benefits, including supplementing immunohistochemistry to refine the histological diagnosis and overcoming some of the limitations of the histological assessment. The recent 2021 WHO classification has introduced a variety of changes and continues the trend of increasing the importance of molecular markers in the diagnosis. Key changes include a formal distinction between adult- and paediatric-type diffuse gliomas, the addition of new diagnostic entities, refinements to the nomenclature for IDH-mutant (IDHmut) and IDH-wildtype (IDHwt) gliomas, a shift to grading within tumour types, and the addition of molecular markers as a determinant of tumour grade in addition to phenotype. These changes provide both challenges and opportunities for the field of radiogenomics, which are discussed in this review. This includes implications for the interpretation of research performed prior to the 2021 classification, based on the shift to first classifying gliomas based on genotype ahead of grade, as well as opportunities for future research and priorities for clinical integration.
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Affiliation(s)
- Arian Lasocki
- Department of Cancer Imaging, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, Australia
- Department of Radiology, The University of Melbourne, Parkville, Victoria, Australia
| | | | - Frank Gaillard
- Department of Radiology, The University of Melbourne, Parkville, Victoria, Australia
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
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Lasocki A, Buckland ME, Molinaro T, Xie J, Gaillard F. Radiogenomics Provides Insights into Gliomas Demonstrating Single-Arm 1p or 19q Deletion. AJNR Am J Neuroradiol 2023; 44:1270-1274. [PMID: 37884300 PMCID: PMC10631530 DOI: 10.3174/ajnr.a8034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 09/15/2023] [Indexed: 10/28/2023]
Abstract
BACKGROUND AND PURPOSE IDH-mutant gliomas are further divided on the basis of 1p/19q status: oligodendroglioma, IDH-mutant and 1p/19q-codeleted, and astrocytoma, IDH-mutant (without codeletion). Occasionally, testing may reveal single-arm 1p or 19q deletion (unideletion), which remains within the diagnosis of astrocytoma. Molecular assessment has some limitations, however, raising the possibility that some unideleted tumors could actually be codeleted. This study assessed whether unideleted tumors had MR imaging features and survival more consistent with astrocytomas or oligodendrogliomas. MATERIALS AND METHODS One hundred twenty-one IDH-mutant grade 2-3 gliomas with 1p/19q results were identified. Two neuroradiologists assessed the T2-FLAIR mismatch sign and calcifications, as differentiators of astrocytomas and oligodendrogliomas. MR imaging features and survival were compared among the unideleted tumors, codeleted tumors, and those without 1p or 19q deletion. RESULTS The cohort comprised 65 tumors without 1p or 19q deletion, 12 unideleted tumors, and 44 codeleted. The proportion of unideleted tumors demonstrating the T2-FLAIR mismatch sign (33%) was similar to that in tumors without deletion (49%; P = .39), but significantly higher than codeleted tumors (0%; P = .001). Calcifications were less frequent in unideleted tumors (0%) than in codeleted tumors (25%), but this difference did not reach statistical significance (P = .097). The median survival of patients with unideleted tumors was 7.8 years, which was similar to that in tumors without deletion (8.5 years; P = .72) but significantly shorter than that in codeleted tumors (not reaching median survival after 12 years; P = .013). CONCLUSIONS IDH-mutant gliomas with single-arm 1p or 19q deletion have MR imaging appearance and survival that are similar to those of astrocytomas without 1p or 19q deletion and significantly different from those of 1p/19q-codeleted oligodendrogliomas.
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Affiliation(s)
- Arian Lasocki
- From the Department of Cancer Imaging (A.L.), Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology (A.L.), The University of Melbourne, Parkville, Victoria, Australia
- Department of Radiology (A.L., F.G.), The University of Melbourne, Parkville, Victoria, Australia
| | - Michael E Buckland
- Department of Neuropathology (M.E.B.), Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
- School of Medical Sciences (M.E.B.), University of Sydney, Camperdown, New South Wales, Australia
| | - Tahlia Molinaro
- Department of Medical Oncology (T.M.), Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - Jing Xie
- Centre for Biostatistics and Clinical Trials (J.X.), Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - Frank Gaillard
- Department of Radiology (A.L., F.G.), The University of Melbourne, Parkville, Victoria, Australia
- Department of Radiology (F.G.), The Royal Melbourne Hospital, Parkville, Victoria, Australia
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Lasocki A, Buckland ME, Molinaro T, Xie J, Whittle JR, Wei H, Gaillard F. Correlating MRI features with additional genetic markers and patient survival in histological grade 2-3 IDH-mutant astrocytomas. Neuroradiology 2023:10.1007/s00234-023-03175-0. [PMID: 37316586 DOI: 10.1007/s00234-023-03175-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/04/2023] [Indexed: 06/16/2023]
Abstract
PURPOSE The increasing importance of molecular markers for classification and prognostication of diffuse gliomas has prompted the use of imaging features to predict genotype ("radiogenomics"). CDKN2A/B homozygous deletion has only recently been added to the diagnostic paradigm for IDH[isocitrate dehydrogenase]-mutant astrocytomas; thus, associated radiogenomic literature is sparse. There is also little data on whether different IDH mutations are associated with different imaging appearances. Furthermore, given that molecular status is now generally obtained routinely, the additional prognostic value of radiogenomic features is less clear. This study correlated MRI features with CDKN2A/B status, IDH mutation type and survival in histological grade 2-3 IDH-mutant brain astrocytomas. METHODS Fifty-eight grade 2-3 IDH-mutant astrocytomas were identified, 50 with CDKN2A/B results. IDH mutations were stratified into IDH1-R132H and non-canonical mutations. Background and survival data were obtained. Two neuroradiologists independently assessed the following MRI features: T2-FLAIR mismatch (<25%, 25-50%, >50%), well-defined tumour margins, contrast-enhancement (absent, wispy, solid) and central necrosis. RESULTS 8/50 tumours with CDKN2A/B results demonstrated homozygous deletion; slightly shorter survival was not significant (p=0.571). IDH1-R132H mutations were present in 50/58 (86%). No MRI features correlated with CDKN2A/B status or IDH mutation type. T2-FLAIR mismatch did not predict survival (p=0.977), but well-defined margins predicted longer survival (HR 0.36, p=0.008), while solid enhancement predicted shorter survival (HR 3.86, p=0.004). Both correlations remained significant on multivariate analysis. CONCLUSION MRI features did not predict CDKN2A/B homozygous deletion, but provided additional positive and negative prognostic information which correlated more strongly with prognosis than CDKN2A/B status in our cohort.
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Affiliation(s)
- Arian Lasocki
- Department of Cancer Imaging, Peter MacCallum Cancer Centre, Grattan St, Melbourne, Melbourne, Victoria, 3000, Australia.
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, Australia.
- Department of Radiology, The University of Melbourne, Parkville, Victoria, Australia.
| | - Michael E Buckland
- Department of Neuropathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
- School of Medical Sciences, University of Sydney, Camperdown, NSW, Australia
| | - Tahlia Molinaro
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - Jing Xie
- Centre for Biostatistics and Clinical Trials, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - James R Whittle
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, Australia
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Personalised Oncology Division, Walter and Eliza Hall Institute, Parkville, Victoria, Australia
- Department of Medical Biology, The University of Melbourne, Parkville, Victoria, Australia
| | - Heng Wei
- Department of Neuropathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Frank Gaillard
- Department of Radiology, The University of Melbourne, Parkville, Victoria, Australia
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
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Tang JSN, Lai JKC, Bui J, Wang W, Simkin P, Gai D, Chan J, Pascoe DM, Heinze SB, Gaillard F, Lui E. Impact of Different Artificial Intelligence User Interfaces on Lung Nodule and Mass Detection on Chest Radiographs. Radiol Artif Intell 2023; 5:e220079. [PMID: 37293345 PMCID: PMC10245182 DOI: 10.1148/ryai.220079] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 02/07/2023] [Accepted: 03/02/2023] [Indexed: 06/10/2023]
Abstract
Purpose To explore the impact of different user interfaces (UIs) for artificial intelligence (AI) outputs on radiologist performance and user preference in detecting lung nodules and masses on chest radiographs. Materials and Methods A retrospective paired-reader study with a 4-week washout period was used to evaluate three different AI UIs compared with no AI output. Ten radiologists (eight radiology attending physicians and two trainees) evaluated 140 chest radiographs (81 with histologically confirmed nodules and 59 confirmed as normal with CT), with either no AI or one of three UI outputs: (a) text-only, (b) combined AI confidence score and text, or (c) combined text, AI confidence score, and image overlay. Areas under the receiver operating characteristic curve were calculated to compare radiologist diagnostic performance with each UI with their diagnostic performance without AI. Radiologists reported their UI preference. Results The area under the receiver operating characteristic curve improved when radiologists used the text-only output compared with no AI (0.87 vs 0.82; P < .001). There was no difference in performance for the combined text and AI confidence score output compared with no AI (0.77 vs 0.82; P = .46) and for the combined text, AI confidence score, and image overlay output compared with no AI (0.80 vs 0.82; P = .66). Eight of the 10 radiologists (80%) preferred the combined text, AI confidence score, and image overlay output over the other two interfaces. Conclusion Text-only UI output significantly improved radiologist performance compared with no AI in the detection of lung nodules and masses on chest radiographs, but user preference did not correspond with user performance.Keywords: Artificial Intelligence, Chest Radiograph, Conventional Radiography, Lung Nodule, Mass Detection© RSNA, 2023.
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Marris JE, Perfors A, Mitchell D, Wang W, McCusker MW, Lovell TJH, Gibson RN, Gaillard F, Howe PDL. Evaluating the effectiveness of different perceptual training methods in a difficult visual discrimination task with ultrasound images. Cogn Res Princ Implic 2023; 8:19. [PMID: 36940041 PMCID: PMC10027970 DOI: 10.1186/s41235-023-00467-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 01/16/2023] [Indexed: 03/21/2023] Open
Abstract
Recent work has shown that perceptual training can be used to improve the performance of novices in real-world visual classification tasks with medical images, but it is unclear which perceptual training methods are the most effective, especially for difficult medical image discrimination tasks. We investigated several different perceptual training methods with medically naïve participants in a difficult radiology task: identifying the degree of hepatic steatosis (fatty infiltration of the liver) in liver ultrasound images. In Experiment 1a (N = 90), participants completed four sessions of standard perceptual training, and participants in Experiment 1b (N = 71) completed four sessions of comparison training. There was a significant post-training improvement for both types of training, although performance was better when the trained task aligned with the task participants were tested on. In both experiments, performance initially improves rapidly, with learning becoming more gradual after the first training session. In Experiment 2 (N = 200), we explored the hypothesis that performance could be improved by combining perceptual training with explicit annotated feedback presented in a stepwise fashion. Although participants improved in all training conditions, performance was similar regardless of whether participants were given annotations, or underwent training in a stepwise fashion, both, or neither. Overall, we found that perceptual training can rapidly improve performance on a difficult radiology task, albeit not to a comparable level as expert performance, and that similar levels of performance were achieved across the perceptual training paradigms we compared.
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Affiliation(s)
- Jessica E Marris
- Melbourne School of Psychological Sciences, University of Melbourne, Parkville, Australia.
| | - Andrew Perfors
- Melbourne School of Psychological Sciences, University of Melbourne, Parkville, Australia
| | - David Mitchell
- Radiology, Sligo University Hospital, Sligo, Ireland
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Australia
| | - Wayland Wang
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Australia
| | - Mark W McCusker
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Australia
- Department of Radiology, University of Melbourne, Parkville, Australia
| | | | - Robert N Gibson
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Australia
- Department of Radiology, University of Melbourne, Parkville, Australia
| | - Frank Gaillard
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Australia
- Department of Radiology, University of Melbourne, Parkville, Australia
| | - Piers D L Howe
- Melbourne School of Psychological Sciences, University of Melbourne, Parkville, Australia
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Tadd K, Rego T, Gaillard F, Malpas CB, Walterfang M, Velakoulis D, Farrand S. Neuroimaging in the Acute Psychiatric Setting: Associations With Neuropsychiatric Risk Factors. J Neuropsychiatry Clin Neurosci 2022; 35:184-191. [PMID: 36128679 DOI: 10.1176/appi.neuropsych.21110269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE The appropriateness and clinical utility of neuroimaging in psychiatric populations has been long debated, and the ambiguity of guideline recommendations is well established. Most of the literature is focused on first-episode psychosis. The investigators aimed to review ordering practices and identify risk factors associated with neuroradiological MRI abnormalities and their clinical utility in a general psychiatric population. METHODS A retrospective file review was undertaken for 100 consecutive brain MRI scans for adult psychiatric inpatients who received scanning as part of their clinical care in an Australian hospital. RESULTS Brain MRI was abnormal in 79.0% of scans; in these cases, 72.2% of patients required further investigation or follow-up, with 17.7% requiring urgent referral within days to weeks, despite only 3.7% of admitted patients undergoing MRI during the study period. Psychiatrically relevant abnormalities were found in 32.0% of scans. Abnormalities were more likely to be found in the presence of cognitive impairment, older age, and longer duration of psychiatric disorder. Psychiatrically relevant abnormalities had further associations with older age at onset of the psychiatric disorder and a weak association with abnormal neurological examination. Multiple indications for imaging were present in 57.0% of patients; the most common indications were physical, neurological, and cognitive abnormalities. CONCLUSIONS Brain MRI is a useful part of psychiatric management in the presence of certain neuropsychiatric risk factors. The present findings suggest that treating teams can judiciously tailor radiological investigations while limiting excessive imaging. Future research in larger cohorts across multiple centers may contribute to shaping more consistent neuroimaging guidelines in psychiatry.
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Affiliation(s)
- Katelyn Tadd
- Mental Health Program, NorthWestern Mental Health (Tadd, Rego, Farrand) and Eastern Health (Tadd), Melbourne, Victoria, Australia; Department of Psychiatry (Rego), Faculty of Medicine, Dentistry and Health Sciences (Gaillard), and Melbourne School of Psychological Sciences (Malpas), University of Melbourne; Department of Radiology (Gaillard), Clinical Outcomes Research Unit, Department of Medicine (Malpas), Department of Neurology (Malpas), and Department of Neuropsychiatry (Walterfang, Velakoulis, Farrand), Royal Melbourne Hospital; Melbourne Neuropsychiatry Center, University of Melbourne and NorthWestern Mental Health (Walterfang, Velakoulis); Florey Institute of Neuroscience and Mental Health, Melbourne (Walterfang)
| | - Thomas Rego
- Mental Health Program, NorthWestern Mental Health (Tadd, Rego, Farrand) and Eastern Health (Tadd), Melbourne, Victoria, Australia; Department of Psychiatry (Rego), Faculty of Medicine, Dentistry and Health Sciences (Gaillard), and Melbourne School of Psychological Sciences (Malpas), University of Melbourne; Department of Radiology (Gaillard), Clinical Outcomes Research Unit, Department of Medicine (Malpas), Department of Neurology (Malpas), and Department of Neuropsychiatry (Walterfang, Velakoulis, Farrand), Royal Melbourne Hospital; Melbourne Neuropsychiatry Center, University of Melbourne and NorthWestern Mental Health (Walterfang, Velakoulis); Florey Institute of Neuroscience and Mental Health, Melbourne (Walterfang)
| | - Frank Gaillard
- Mental Health Program, NorthWestern Mental Health (Tadd, Rego, Farrand) and Eastern Health (Tadd), Melbourne, Victoria, Australia; Department of Psychiatry (Rego), Faculty of Medicine, Dentistry and Health Sciences (Gaillard), and Melbourne School of Psychological Sciences (Malpas), University of Melbourne; Department of Radiology (Gaillard), Clinical Outcomes Research Unit, Department of Medicine (Malpas), Department of Neurology (Malpas), and Department of Neuropsychiatry (Walterfang, Velakoulis, Farrand), Royal Melbourne Hospital; Melbourne Neuropsychiatry Center, University of Melbourne and NorthWestern Mental Health (Walterfang, Velakoulis); Florey Institute of Neuroscience and Mental Health, Melbourne (Walterfang)
| | - Charles B Malpas
- Mental Health Program, NorthWestern Mental Health (Tadd, Rego, Farrand) and Eastern Health (Tadd), Melbourne, Victoria, Australia; Department of Psychiatry (Rego), Faculty of Medicine, Dentistry and Health Sciences (Gaillard), and Melbourne School of Psychological Sciences (Malpas), University of Melbourne; Department of Radiology (Gaillard), Clinical Outcomes Research Unit, Department of Medicine (Malpas), Department of Neurology (Malpas), and Department of Neuropsychiatry (Walterfang, Velakoulis, Farrand), Royal Melbourne Hospital; Melbourne Neuropsychiatry Center, University of Melbourne and NorthWestern Mental Health (Walterfang, Velakoulis); Florey Institute of Neuroscience and Mental Health, Melbourne (Walterfang)
| | - Mark Walterfang
- Mental Health Program, NorthWestern Mental Health (Tadd, Rego, Farrand) and Eastern Health (Tadd), Melbourne, Victoria, Australia; Department of Psychiatry (Rego), Faculty of Medicine, Dentistry and Health Sciences (Gaillard), and Melbourne School of Psychological Sciences (Malpas), University of Melbourne; Department of Radiology (Gaillard), Clinical Outcomes Research Unit, Department of Medicine (Malpas), Department of Neurology (Malpas), and Department of Neuropsychiatry (Walterfang, Velakoulis, Farrand), Royal Melbourne Hospital; Melbourne Neuropsychiatry Center, University of Melbourne and NorthWestern Mental Health (Walterfang, Velakoulis); Florey Institute of Neuroscience and Mental Health, Melbourne (Walterfang)
| | - Dennis Velakoulis
- Mental Health Program, NorthWestern Mental Health (Tadd, Rego, Farrand) and Eastern Health (Tadd), Melbourne, Victoria, Australia; Department of Psychiatry (Rego), Faculty of Medicine, Dentistry and Health Sciences (Gaillard), and Melbourne School of Psychological Sciences (Malpas), University of Melbourne; Department of Radiology (Gaillard), Clinical Outcomes Research Unit, Department of Medicine (Malpas), Department of Neurology (Malpas), and Department of Neuropsychiatry (Walterfang, Velakoulis, Farrand), Royal Melbourne Hospital; Melbourne Neuropsychiatry Center, University of Melbourne and NorthWestern Mental Health (Walterfang, Velakoulis); Florey Institute of Neuroscience and Mental Health, Melbourne (Walterfang)
| | - Sarah Farrand
- Mental Health Program, NorthWestern Mental Health (Tadd, Rego, Farrand) and Eastern Health (Tadd), Melbourne, Victoria, Australia; Department of Psychiatry (Rego), Faculty of Medicine, Dentistry and Health Sciences (Gaillard), and Melbourne School of Psychological Sciences (Malpas), University of Melbourne; Department of Radiology (Gaillard), Clinical Outcomes Research Unit, Department of Medicine (Malpas), Department of Neurology (Malpas), and Department of Neuropsychiatry (Walterfang, Velakoulis, Farrand), Royal Melbourne Hospital; Melbourne Neuropsychiatry Center, University of Melbourne and NorthWestern Mental Health (Walterfang, Velakoulis); Florey Institute of Neuroscience and Mental Health, Melbourne (Walterfang)
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Gaillard F, Ould Rabah M, Garcelon N, Touam M, Neuraz A, Legendre C, Anglicheau D, Prié D, Bienaime F. Impact de la fonction du greffon rénal sur la masse musculaire après transplantation. Nephrol Ther 2022. [DOI: 10.1016/j.nephro.2022.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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11
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Gaillard F, Bachelet D, Couchoud C, Laouenan C, Jourde Chiche N, Daugas E. Évolution de l’activité de la maladie et complications graves chez les patients lupiques débutant la dialyse. Nephrol Ther 2022. [DOI: 10.1016/j.nephro.2022.07.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Pastural M, Santin G, Savoye E, Kerbaul F, Gaillard F. Comparaison de la fonction du greffon rénal après un don du vivant et donneur décédé en fonction de l’âge du receveur et du donneur : une analyse observationnelle simulant un essai randomisé. Nephrol Ther 2022. [DOI: 10.1016/j.nephro.2022.07.273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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13
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D'Anna G, Ugga L, Cuocolo R, Chen MM, Shatzkes DR, Tali ET, Patel A, Kotsenas AL, Van Goethem J, Garg T, Hirsch JA, Martí-Bonmatí L, Gaillard F, Ranschaert E. Virtual conferences: results of an international survey on radiologist preferences and perspectives. Eur Radiol 2022; 32:8191-8199. [PMID: 35652937 PMCID: PMC9159931 DOI: 10.1007/s00330-022-08903-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 05/10/2022] [Accepted: 05/19/2022] [Indexed: 11/16/2022]
Abstract
Background We explored perceptions and preferences regarding the conversion of in-person to virtual conferences as necessitated by travel and in-person meeting restrictions. Methods A 16-question online survey to assess preferences regarding virtual conferences during the COVID-19 pandemic and future perspectives on this subject was disseminated internationally online between June and August 2020. Findings A total of 508 responses were received from 73 countries. The largest number of responses came from Italy and the USA. The majority of respondents had already attended a virtual conference (80%) and would like to attend future virtual meetings (97%). The ideal duration of such an event was 2–3 days (42%). The preferred time format was a 2–4-h session (43%). Most respondents also noted that they would like a significant fee reduction and the possibility to attend a conference partly in-person and partly online. Respondents indicated educational sessions as the most valuable sections of virtual meetings. The reported positive factor of the virtual meeting format is the ability to re-watch lectures on demand. On the other hand, the absence of networking and human contact was recognized as a significant loss. In the future, people expressed a preference to attend conferences in person for networking purposes, but only in safer conditions. Conclusions Respondents appreciated the opportunity to attend the main radiological congresses online and found it a good opportunity to stay updated without having to travel. However, in general, they would prefer these conferences to be structured differently. The lack of networking opportunities was the main reason for preferring an in-person meeting. Key Points • Respondents appreciated the opportunity to attend the main radiological meetings online, considering it a good opportunity to stay updated without having to travel. • In the future, it is likely for congresses to offer attendance options both in person and online, making them more accessible to a larger audience. • Respondents indicated that networking represents the most valuable advantage of in-person conferences compared to online ones. Supplementary Information The online version contains supplementary material available at 10.1007/s00330-022-08903-3.
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Affiliation(s)
| | - Lorenzo Ugga
- Department of Advanced Biomedical Sciences, University of Naples "Federico II", Naples, Italy
| | - Renato Cuocolo
- Department of Medicine, Surgery, and Dentistry, University of Salerno, Baronissi, Italy
| | - Melissa Mei Chen
- Department of Neuroradiology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - Deborah Rachelle Shatzkes
- Department of Radiology, Zucker School of Medicine at Hofstra/Northwell, Lenox Hill Hospital and The New York Head and Neck Institute, New York, NY, USA
| | - Emin Turgut Tali
- Department of Radiology, Gazi University School of Medicine, Ankara, Turkey
| | - Amy Patel
- Department of Radiology, Liberty Hospital, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
| | | | - Johan Van Goethem
- Department of Biomedical Sciences, Antwerp University Hospital, Antwerp, Belgium
- Department of Radiology, AZ Nikolaas, Sint-Niklaas, Belgium
| | - Tushar Garg
- Seth GS Medical College & KEM Hospital, Mumbai, India
| | - Joshua Adam Hirsch
- Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Luis Martí-Bonmatí
- Medical Imaging Department, La Fe University and Polytechnic Hospital, Valencia, Spain
| | - Frank Gaillard
- Faculty of Medicine, Dentistry, and Health Sciences at the University of Melbourne, Parkville, Australia
- Department of Radiology, The Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Erik Ranschaert
- Department of Radiology, Elisabeth-Tweesteden Hospital (ETZ), Tilburg, The Netherlands
- Ghent University, Ghent, Belgium
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14
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Lasocki A, Buckland ME, Drummond KJ, Wei H, Xie J, Christie M, Neal A, Gaillard F. Conventional MRI features can predict the molecular subtype of adult grade 2-3 intracranial diffuse gliomas. Neuroradiology 2022; 64:2295-2305. [PMID: 35606654 PMCID: PMC9643259 DOI: 10.1007/s00234-022-02975-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 05/04/2022] [Indexed: 12/02/2022]
Abstract
Purpose Molecular biomarkers are important for classifying intracranial gliomas, prompting research into correlating imaging with genotype (“radiogenomics”). A limitation of the existing radiogenomics literature is the paucity of studies specifically characterizing grade 2–3 gliomas into the three key molecular subtypes. Our study investigated the accuracy of multiple different conventional MRI features for genotype prediction. Methods Grade 2–3 gliomas diagnosed between 2007 and 2013 were identified. Two neuroradiologists independently assessed nine conventional MRI features. Features with better inter-observer agreement (κ ≥ 0.6) proceeded to consensus assessment. MRI features were correlated with genotype, classified as IDH-mutant and 1p/19q-codeleted (IDHmut/1p19qcodel), IDH-mutant and 1p/19q-intact (IDHmut/1p19qint), or IDH-wildtype (IDHwt). For IDHwt tumors, additional molecular markers of glioblastoma were noted. Results One hundred nineteen patients were included. T2-FLAIR mismatch (stratified as > 50%, 25–50%, or < 25%) was the most predictive feature across genotypes (p < 0.001). All 30 tumors with > 50% mismatch were IDHmut/1p19qint, and all seven with 25–50% mismatch. Well-defined margins correlated with IDHmut/1p19qint status on univariate analysis (p < 0.001), but this related to correlation with T2-FLAIR mismatch; there was no longer an association when considering only tumors with < 25% mismatch (p = 0.386). Enhancement (p = 0.001), necrosis (p = 0.002), and hemorrhage (p = 0.027) correlated with IDHwt status (especially “molecular glioblastoma”). Calcification correlated with IDHmut/1p19qcodel status (p = 0.003). A simple, step-wise algorithm incorporating these features, when present, correctly predicted genotype with a positive predictive value 91.8%. Conclusion T2-FLAIR mismatch strongly predicts IDHmut/1p19qint even with a lower threshold of ≥ 25% mismatch and outweighs other features. Secondary features include enhancement, necrosis and hemorrhage (predicting IDHwt, especially “molecular glioblastoma”), and calcification (predicting IDHmut/1p19qcodel).
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Affiliation(s)
- Arian Lasocki
- Department of Cancer Imaging, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia
| | - Michael E Buckland
- Department of Neuropathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia.,School of Medical Sciences, University of Sydney, Camperdown, NSW, Australia
| | - Katharine J Drummond
- Department of Neurosurgery, The Royal Melbourne Hospital, Parkville, VIC, Australia.,Department of Surgery, The University of Melbourne, Parkville, VIC, Australia
| | - Heng Wei
- Department of Neuropathology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Jing Xie
- Centre for Biostatistics and Clinical Trials, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Michael Christie
- Department of Anatomical Pathology, The Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Andrew Neal
- Department of Neurology, The Royal Melbourne Hospital, Parkville, VIC, Australia.,Department of Neuroscience, Central Clinical School, Monash University, Clayton, VIC, Australia
| | - Frank Gaillard
- Department of Radiology, The Royal Melbourne Hospital, Parkville, VIC, Australia.,Department of Radiology, The University of Melbourne, Parkville, VIC, Australia
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15
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Holper S, Lewis V, Wesselingh R, Gaillard F, Collins SJ, Butzkueven H. Comprehensive clinical, radiological, pathological and biochemical analysis required to differentiate VV1 sporadic Creutzfeldt-Jakob disease from suspected variant CJD. BMJ Neurol Open 2022; 4:e000299. [PMID: 35519901 PMCID: PMC9020293 DOI: 10.1136/bmjno-2022-000299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2022] [Indexed: 11/03/2022] Open
Abstract
BackgroundA diagnosis of variant Creutzfeldt-Jakob disease (vCJD), the zoonotic prion disease related to transmission of bovine spongiform encephalopathy, can carry enormous public health ramifications. Until recently, all vCJD clinical cases were confined to patients displaying methionine homozygosity (MM) at codon 129 of the prion protein gene (PRNP). The recent diagnosis of vCJD in a patient heterozygous (MV) at codon 129 reignited concerns regarding a second wave of vCJD cases, with the possibility of phenotypic divergence from MM vCJD and greater overlap with sporadic CJD (sCJD) molecular subtypes.Method and resultsWe present a case of CJD with clinico-epidemiological and radiological characteristics creating initial concerns for vCJD. Thorough case evaluation, including data provided by genetic testing, autopsy and neuropathological histological analyses, provided a definitive diagnosis of the rare VV1 molecular subtype of sCJD.ConclusionDistinguishing vCJD from sCJD is of vital public health importance and potentially more problematic with the development of non-MM vCJD cases. The patient described herein demonstrates that in addition to the clinico-epidemiological profile, combined supplementary pathological, biochemical and critical radiological analysis may be necessary for confident discrimination of sCJD, especially rare sub-types, from vCJD.
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Affiliation(s)
- Sarah Holper
- Department of Neurosciences, The Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Victoria Lewis
- Australian National CJD Registry, The Florey Institute of Neuroscience and Mental Health, Parkville, Victoria, Australia
- Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia
| | - Robb Wesselingh
- Department of Neurosciences, Alfred Hospital, Melbourne, Victoria, Australia
- Monash University Central Clinical School, Melbourne, Victoria, Australia
| | - Frank Gaillard
- Faculty of Medicine Dentistry and Health Sciences, The University of Melbourne, Melbourne, Victoria, Australia
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Steven J Collins
- Australian National CJD Registry, The Florey Institute of Neuroscience and Mental Health, Parkville, Victoria, Australia
- Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Parkville, Victoria, Australia
| | - Helmut Butzkueven
- Department of Neurosciences, Alfred Hospital, Melbourne, Victoria, Australia
- Monash University Central Clinical School, Melbourne, Victoria, Australia
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16
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Lu S, Brusic A, Gaillard F. Arachnoid Membranes: Crawling Back into Radiologic Consciousness. AJNR Am J Neuroradiol 2022; 43:167-175. [PMID: 34711549 PMCID: PMC8985673 DOI: 10.3174/ajnr.a7309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 07/29/2021] [Indexed: 02/03/2023]
Abstract
The arachnoid membranes are projections of connective tissue in the subarachnoid space that connect the arachnoid mater to the pia mater. These are underappreciated and largely unrecognized by most neuroradiologists despite being found to be increasingly important in the pathogenesis, imaging, and treatment of communicating hydrocephalus. This review aims to provide neuroradiologists with an overview of the history, embryology, histology, anatomy, and normal imaging appearance of these membranes, as well as some examples of their clinical importance.
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Affiliation(s)
- S. Lu
- From the Department of Radiology (S.L., A.B., F.G.), Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - A. Brusic
- From the Department of Radiology (S.L., A.B., F.G.), Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - F. Gaillard
- From the Department of Radiology (S.L., A.B., F.G.), Royal Melbourne Hospital, Parkville, Victoria, Australia,Faculty of Medicine, Dentistry, and Health Sciences (F.G.), University of Melbourne, Parkville, Victoria, Australia
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17
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Tang JSN, Seah JCY, Zia A, Gajera J, Schlegel RN, Wong AJN, Gai D, Su S, Bose T, Kok ML, Jarema A, Harisis GN, Cheng CT, Kavnoudias H, Wang W, Stein A, Shih G, Gaillard F, Dixon A, Law M. CLiP, catheter and line position dataset. Sci Data 2021; 8:285. [PMID: 34711836 PMCID: PMC8553862 DOI: 10.1038/s41597-021-01066-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 09/14/2021] [Indexed: 11/09/2022] Open
Abstract
Correct catheter position is crucial to ensuring appropriate function of the catheter and avoid complications. This paper describes a dataset consisting of 50,612 image level and 17,999 manually labelled annotations from 30,083 chest radiographs from the publicly available NIH ChestXRay14 dataset with manually annotated and segmented endotracheal tubes (ETT), nasoenteric tubes (NET) and central venous catheters (CVCs).
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Affiliation(s)
- Jennifer S N Tang
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, Victoria, Australia.
| | - Jarrel C Y Seah
- Department of Radiology, Alfred Health, Melbourne, Victoria, Australia.
| | - Adil Zia
- Department of Radiology, Alfred Health, Melbourne, Victoria, Australia
| | - Jay Gajera
- Alfred Health, Melbourne, Victoria, Australia
| | | | - Aaron J N Wong
- Department of Radiology, Monash Health, Melbourne, Victoria, Australia.,Barwon Imaging, Geelong, Victoria, Australia
| | - Dayu Gai
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Shu Su
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Tony Bose
- The Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | | | - Alex Jarema
- Department of Radiology, Alfred Health, Melbourne, Victoria, Australia
| | - George N Harisis
- Department of Radiology, Alfred Health, Melbourne, Victoria, Australia
| | | | - Helen Kavnoudias
- Department of Radiology, Alfred Health, Melbourne, Victoria, Australia.,Department of Surgery, Monash School of Medicine, Nursing and Health Sciences, Clayton, Victoria, Australia
| | - Wayland Wang
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | | | - George Shih
- Department of Radiology, Weill Cornell Medicine, New York, USA
| | - Frank Gaillard
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, Victoria, Australia.,Faculty of Medicine, Dentistry and Health Sciences at the University of Melbourne, Melbourne, Victoria, Australia
| | - Andrew Dixon
- Department of Radiology, Alfred Health, Melbourne, Victoria, Australia
| | - Meng Law
- Department of Radiology, Alfred Health, Melbourne, Victoria, Australia.,Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria, Australia.,Department of Neuroscience, Monash School of Medicine, Nursing and Health Sciences, Clayton, Victoria, Australia.,Departments of Neurological Surgery and Biomedical Engineering, University of Southern California, Los Angeles, USA
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18
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Gaillard F, Courbebaisse M, Couzi L, Dubourg L, Garrouste C, Hourmant M, Kamar N, Rostaing L, Mariat C, Delanaye P. Age-adapted percentiles for older candidates to living kidney donation. Nephrol Ther 2021. [DOI: 10.1016/j.nephro.2021.07.310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Barnett M, Bergsland N, Weinstock-Guttman B, Butzkueven H, Kalincik T, Desmond P, Gaillard F, van Pesch V, Ozakbas S, Rojas JI, Boz C, Altintas A, Wang C, Dwyer MG, Yang S, Jakimovski D, Kyle K, Ramasamy DP, Zivadinov R. Brain atrophy and lesion burden are associated with disability progression in a multiple sclerosis real-world dataset using only T2-FLAIR: The NeuroSTREAM MSBase study. Neuroimage Clin 2021; 32:102802. [PMID: 34469848 PMCID: PMC8408519 DOI: 10.1016/j.nicl.2021.102802] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 07/28/2021] [Accepted: 08/18/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Methodological challenges limit the use of brain atrophy and lesion burden measures in the follow-up of multiple sclerosis (MS) patients on clinical routine datasets. OBJECTIVE To determine the feasibility of T2-FLAIR-only measures of lateral ventricular volume (LVV) and salient central lesion volume (SCLV), as markers of disability progression (DP) in MS. METHODS A total of 3,228 MS patients from 9 MSBase centers in 5 countries were enrolled. Of those, 2,875 (218 with clinically isolated syndrome, 2,231 with relapsing-remitting and 426 with progressive disease subtype) fulfilled inclusion and exclusion criteria. Patients were scanned on either 1.5 T or 3 T MRI scanners, and 5,750 brain scans were collected at index and on average after 42.3 months at post-index. Demographic and clinical data were collected from the MSBase registry. LVV and SCLV were measured on clinical routine T2-FLAIR images. RESULTS Longitudinal LVV and SCLV analyses were successful in 96% of the scans. 57% of patients had scanner-related changes over the follow-up. After correcting for age, sex, disease duration, disability, disease-modifying therapy and LVV at index, and follow-up time, MS patients with DP (n = 671) had significantly greater absolute LVV change compared to stable (n = 1,501) or disability improved (DI, n = 248) MS patients (2.0 mL vs. 1.4 mL vs. 1.1 mL, respectively, ANCOVA p < 0.001, post-hoc pair-wise DP vs. Stable p = 0.003; and DP vs. DI, p = 0.002). Similar ANCOVA model was also significant for SCLV (p = 0.03). CONCLUSIONS LVV-based atrophy and SCLV-based lesion outcomes are feasible on clinically acquired T2-FLAIR scans in a multicenter fashion and are associated with DP over mid-term.
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Affiliation(s)
- Michael Barnett
- Sydney Neuroimaging Analysis Centre, Camperdown, Sydney, Australia; Brain and Mind Centre, University of Sydney, Sydney, Australia.
| | - Niels Bergsland
- Buffalo Neuroimaging Analysis Center, Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, NY, USA; IRCCS, Fondazione Don Carlo Gnocchi ONLUS, Italy
| | - Bianca Weinstock-Guttman
- Jacobs Comprehensive MS Treatment and Research Center, Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, NY, USA
| | | | - Tomas Kalincik
- CORe, Department of Medicine, The University of Melbourne, Melbourne, Australia; MS Centre, The Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia
| | - Patricia Desmond
- Department of Radiology, Royal Melbourne Hospital, The University of Melbourne, Melbourne, Australia
| | - Frank Gaillard
- Department of Radiology, Royal Melbourne Hospital, The University of Melbourne, Melbourne, Australia
| | | | | | | | - Cavit Boz
- KTU Medical Faculty Farabi Hospital, Trabzon, Turkey
| | - Ayse Altintas
- Koç University School of Medicine, Koç University Research Center for Translational Medicine (KUTTAM), İstanbul, Turkey
| | - Chenyu Wang
- Sydney Neuroimaging Analysis Centre, Camperdown, Sydney, Australia; Brain and Mind Centre, University of Sydney, Sydney, Australia
| | - Michael G Dwyer
- Buffalo Neuroimaging Analysis Center, Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, NY, USA; Center for Biomedical Imaging, Clinical Translational Science Institute, USA; University at Buffalo, NY, USA
| | - Suzie Yang
- Sydney Neuroimaging Analysis Centre, Camperdown, Sydney, Australia
| | - Dejan Jakimovski
- Buffalo Neuroimaging Analysis Center, Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, NY, USA
| | - Kain Kyle
- Sydney Neuroimaging Analysis Centre, Camperdown, Sydney, Australia; Brain and Mind Centre, University of Sydney, Sydney, Australia
| | - Deepa P Ramasamy
- Buffalo Neuroimaging Analysis Center, Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, NY, USA
| | - Robert Zivadinov
- Buffalo Neuroimaging Analysis Center, Department of Neurology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, NY, USA; Center for Biomedical Imaging, Clinical Translational Science Institute, USA; University at Buffalo, NY, USA
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Wibawa P, Matta G, Das S, Eratne D, Farrand S, Desmond P, Velakoulis D, Gaillard F. Bringing psychiatrists into the picture: Automated measurement of regional MRI brain volume in patients with suspected dementia. Aust N Z J Psychiatry 2021; 55:799-808. [PMID: 33726553 DOI: 10.1177/0004867421998444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The volumes of various brain regions can be rapidly quantified using automated magnetic resonance imaging tools. While these appear to be useful at face value, their formal clinical utility is not yet understood, particularly for non-neuroradiologists and in patients presenting with suspected dementia. This study investigated the utility of an automated normative morphometry tool on determinations of brain atrophy by psychiatrists and radiologists in a tertiary hospital. METHODS Consecutive magnetic resonance scans (n = 110) of patients referred with suspected neurodegenerative disorders were obtained retrospectively and rated by two neuroradiologists, two general radiologists and four psychiatrists over two sessions. First, conventional magnetic resonance sequences were shown. Then, morphometry colour-coded maps, which segmented T1-weighted magnetisation prepared rapid gradient echo images into brain regions and visualised these regions in colour according to their volumetric standard deviation from a normative population, were added to the second reading which occurred ⩾6 weeks later. Presence and laterality of atrophy in frontal, parietal and temporal lobes and hippocampal regions were measured using a digital checklist. The primary outcome of inter-rater agreement on atrophy was measured with Fleiss' Kappa (κ). We also evaluated the accuracy of the atrophy ratings for differentiating post hoc diagnosis of subjective cognitive impairment, mild cognitive impairment and dementia. RESULTS Agreement among all raters was fair in frontal lobe and moderate in other regions with conventional method (κ = 0.362-0.555). With morphometry, higher agreement was seen in all regions (κ = 0.551-0.654), reaching significant improvement in the frontal and temporal lobes. No significant improvement was seen within the various disciplines, except in frontal lobes rated by psychiatrists. Accuracy of atrophy ratings on determining post hoc diagnosis was significantly improved for distinguishing subjective cognitive impairment versus dementia. CONCLUSION In routine clinical assessment, automated normative morphometry complements the determination of regional atrophy and improves inter-rater agreement regardless of neuroradiology experience.
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Affiliation(s)
- Pierre Wibawa
- Neuropsychiatry Unit, The Royal Melbourne Hospital, Melbourne, VIC, Australia
- Melbourne Neuropsychiatry Centre, The University of Melbourne, Melbourne, VIC, Australia
| | - Gabrielle Matta
- Neuropsychiatry Unit, The Royal Melbourne Hospital, Melbourne, VIC, Australia
| | - Sourav Das
- College of Science and Engineering, James Cook University, Townsville, QLD, Australia
| | - Dhamidhu Eratne
- Neuropsychiatry Unit, The Royal Melbourne Hospital, Melbourne, VIC, Australia
- Melbourne Neuropsychiatry Centre, The University of Melbourne, Melbourne, VIC, Australia
| | - Sarah Farrand
- Department of Radiology and Medicine, The Royal Melbourne Hospital, The University of Melbourne, Melbourne, VIC, Australia
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, VIC, Australia
| | - Patricia Desmond
- Department of Radiology and Medicine, The Royal Melbourne Hospital, The University of Melbourne, Melbourne, VIC, Australia
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, VIC, Australia
| | - Dennis Velakoulis
- Neuropsychiatry Unit, The Royal Melbourne Hospital, Melbourne, VIC, Australia
- Melbourne Neuropsychiatry Centre, The University of Melbourne, Melbourne, VIC, Australia
| | - Frank Gaillard
- Department of Radiology and Medicine, The Royal Melbourne Hospital, The University of Melbourne, Melbourne, VIC, Australia
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, VIC, Australia
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Zhen NB, Gaillard F, Walterfang M, Mohd Zain NR, Yoon CK. Depression preceding Marchiafava-Bignami disease. Aust N Z J Psychiatry 2021; 55:224-225. [PMID: 32720512 DOI: 10.1177/0004867420945786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Ng Bee Zhen
- Department of Psychiatry & Mental Health, Tunku Abdul Rahman Institute of Neuroscience, Kuala Lumpur Hospital, Kuala Lumpur, Malaysia
| | - Frank Gaillard
- Department of Radiology, The Royal Melbourne Hospital, Parkville, VIC, Australia.,Department of Radiology, The University of Melbourne, Parkville, VIC, Australia
| | - Mark Walterfang
- Neuropsychiatry Unit, The Royal Melbourne Hospital, Parkville, VIC, Australia.,Melbourne Neuropsychiatry Centre, University of Melbourne and North Western Mental Health, Melbourne, Australia
| | - Norzaini Rose Mohd Zain
- Department of Radiology and Diagnostic Imaging, Kuala Lumpur Hospital, Kuala Lumpur, Malaysia
| | - Chee Kok Yoon
- Department of Psychiatry & Mental Health, Tunku Abdul Rahman Institute of Neuroscience, Kuala Lumpur Hospital, Kuala Lumpur, Malaysia
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22
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Corlette L, Reid A, Roberts-Thomson S, Christie M, Gaillard F. Solitary subependymal giant cell astrocytoma: Case report and review of the literature. J Clin Neurosci 2020; 82:26-28. [PMID: 33317733 DOI: 10.1016/j.jocn.2020.10.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 09/14/2020] [Accepted: 10/03/2020] [Indexed: 10/23/2022]
Abstract
Tuberous sclerosis complex (TSC) is a multisystem autosomal dominant hamartoma syndrome caused by mutations in TSC1 or TSC2 genes, leading to upregulation of cell growth signalling pathways. Subependymal giant cell astrocytomas (SEGAs) are seen almost exclusively in TSC patients. We report a 'solitary SEGA' in an adult patient, with confirmed deletion of the entire TSC2 gene on tumour tissue DNA, in the absence of detectable constitutional mutation or clinical manifestations of TSC. These rare cases may be secondary to somatic mosaicism and provide an opportunity to explore the genetic basis of the syndrome and its related tumours.
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Affiliation(s)
- Lucy Corlette
- Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia.
| | - Amy Reid
- Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia
| | | | - Michael Christie
- Department of Anatomical Pathology, Royal Melbourne Hospital, Melbourne, Australia
| | - Frank Gaillard
- Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia; Faculty of Medicine, Dentistry, and Health Sciences at the University of Melbourne, Parkville, Australia
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23
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Morokoff A, Jones J, Nguyen H, Ma C, Lasocki A, Gaillard F, Bennett I, Luwor R, Stylli S, Paradiso L, Koldej R, Paldor I, Molania R, Speed TP, Webb A, Infusini G, Li J, Malpas C, Kalincik T, Drummond K, Siegal T, Kaye AH. Correction to: Serum microRNA is a biomarker for post-operative monitoring in glioma. J Neurooncol 2020; 149:401. [PMID: 33026635 DOI: 10.1007/s11060-020-03630-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
For the reference citation '[57]' in the second paragraph of the Results section of the original article there was no corresponding entry in the References section. It should have referred to the below mentioned article by Ebrahimkhani et al. (2018).
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Affiliation(s)
- Andrew Morokoff
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia. .,Department of Neurosurgery, Royal Melbourne Hospital, Parkville, VIC, Australia. .,Department of Surgery, University of Melbourne, Royal Melbourne Hospital Parkville, VIC, 3050, Australia.
| | - Jordan Jones
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia.,Department of Neurosurgery, Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Hong Nguyen
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia
| | - Chenkai Ma
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia
| | - Arian Lasocki
- Department of Radiology, University of Melbourne, Parkville, VIC, Australia
| | - Frank Gaillard
- Department of Radiology, University of Melbourne, Parkville, VIC, Australia
| | - Iwan Bennett
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia
| | - Rod Luwor
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia
| | - Stanley Stylli
- Department of Neurosurgery, Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Lucia Paradiso
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia
| | - Rachel Koldej
- Department of Medicine, University of Melbourne, Parkville, VIC, Australia
| | - Iddo Paldor
- Department of Neurosurgery, Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Ramyar Molania
- Walter and Eliza Hall Institute, Parkville, VIC, Australia
| | | | - Andrew Webb
- Walter and Eliza Hall Institute, Parkville, VIC, Australia
| | | | - Jason Li
- Peter MacCallum Cancer Centre, Parkville, VIC, Australia
| | - Charles Malpas
- Clinical Outcomes Research Unit, Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Tomas Kalincik
- Clinical Outcomes Research Unit, Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Katharine Drummond
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia.,Department of Neurosurgery, Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Tali Siegal
- Neuro-Oncology, Davidoff Institute of Oncology, Rabin Medical Center, Petach Tikva, Israel
| | - Andrew H Kaye
- Department of Surgery, University of Melbourne, Parkville, VIC, Australia.,Department of Neurosurgery, Hadassah Hebrew University, Jerusalem, Israel
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25
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Abstract
Radiology signs have long been described in ways that communicate the imagery around us to enhance our cognitive perception. Here, we describe the use and limitations of 10 such signs in neuroradiology, divided into three groups. The first are signs that are reliable for a specific diagnosis, such as the Medusa head sign indicating a developmental venous anomaly, or a racing car sign in agenesis of corpus callosum. The second group of signs helps us to diagnose rare conditions, such as the onion skin sign in Balo's concentric sclerosis. The third group is of unreliable signs that may lead clinicians astray. For example, the absence of a swallow-tail sign in Parkinson's disease or the presence of a hummingbird sign and Mickey Mouse sign in progressive supranuclear palsy. The appropriate use of these signs in clinical practice is essential.
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Affiliation(s)
- Inna Page
- Radiology Department, The Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Frank Gaillard
- Radiology Department, The Royal Melbourne Hospital, Melbourne, Victoria, Australia .,Faculty of Medicine, Dentistry, and Health Sciences, The University of Melbourne, Melbourne, Victoria, Australia
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26
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Gai D, Christie M, Gaillard F. Adult diffuse leptomeningeal glioneuronal tumour with limited leptomeningeal involvement, lack of 1p deletion and BRAF V600E mutation. J Clin Neurosci 2020; 79:215-218. [PMID: 33070899 DOI: 10.1016/j.jocn.2020.07.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 06/26/2020] [Accepted: 07/19/2020] [Indexed: 11/16/2022]
Abstract
Diffuse leptomeningeal glioneuronal tumours (DLGNT) are rare primary CNS tumours, traditionally characterised by leptomeningeal growth and usually affecting children. A recent large study defined DLGNT on a molecular basis, of which all demonstrated 1p deletions. The vast majority also demonstrated MAPK/ERK pathway activations, however BRAF V600E mutation has not been previously documented in adult cases. In this case report, we describe an unusual cerebral DLGNT, with limited leptomeningeal spread, intact 1p status and a BRAF V600E mutation.
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Affiliation(s)
- Dayu Gai
- Department of Radiology, Royal Melbourne Hospital, Parkville, VIC, Australia.
| | - Michael Christie
- Department of Pathology, Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Frank Gaillard
- Department of Radiology, Royal Melbourne Hospital, Parkville, VIC, Australia; Faculty of Medicine, Dentistry, and Health Sciences at the University of Melbourne, Parkville, Australia
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27
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Phakey S, Rego T, Gaillard F, Panetta J, Evans A, De Jong G, Walterfang M. OCD symptoms in succinic semialdehyde dehydrogenase (SSADH) deficiency: a case report. BMC Psychiatry 2020; 20:395. [PMID: 32758201 PMCID: PMC7409703 DOI: 10.1186/s12888-020-02794-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 07/21/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Succinic semialdehyde dehydrogenase (SSADH) deficiency is a rare neurometabolic disorder resulting in a heterogeneous clinical phenotype. Adolescent and adult patients with SSADH deficiency may present with OCD symptoms. There is minimal literature regarding the pathological basis of OCD symptoms and their management amongst SSADH deficiency patients. CASE PRESENTATION A 26-year-old woman with SSADH deficiency experienced obsessional slowness and hesitancy in her activities of daily living, with motor rituals and stereotypies of her hands and face. Neuroimaging revealed T2 hyperintensities of the globi pallidi bilaterally. Commencement of the serotonergic escitalopram moderately improved her OCD symptoms. The addition of the dopaminergic pramipexole hydrochloride yielded further improvement, following unsuccessful trial of other adjuncts: risperidone, methylphenidate and mirtazapine. CONCLUSIONS Pallidal pathology may explain the manifestation of OCD symptoms amongst individuals with SSADH deficiency. Serotonergic and concomitant dopaminergic therapy may be a viable treatment regimen for SSADH deficiency patients presenting with OCD symptoms.
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Affiliation(s)
- Sachin Phakey
- grid.416153.40000 0004 0624 1200Neuropsychiatry Unit, Royal Melbourne Hospital, Grattan St, Parkville, VIC 3050 Australia ,grid.1008.90000 0001 2179 088XFaculty of Medicine, Dentistry and Health Sciences at The University of Melbourne, Grattan St, Parkville, VIC 3010 Australia
| | - Thomas Rego
- grid.416153.40000 0004 0624 1200Neuropsychiatry Unit, Royal Melbourne Hospital, Grattan St, Parkville, VIC 3050 Australia ,grid.1008.90000 0001 2179 088XDepartment of Psychiatry, University of Melbourne, Parkville, VIC 3010 Australia
| | - Frank Gaillard
- grid.1008.90000 0001 2179 088XFaculty of Medicine, Dentistry and Health Sciences at The University of Melbourne, Grattan St, Parkville, VIC 3010 Australia ,grid.416153.40000 0004 0624 1200Department of Radiology, Royal Melbourne Hospital, Grattan St, Parkville, VIC 3050 Australia
| | - Julie Panetta
- grid.416153.40000 0004 0624 1200Metabolic Diseases Unit, Royal Melbourne Hospital, Grattan St, Parkville, VIC 3050 Australia
| | - Andrew Evans
- grid.416153.40000 0004 0624 1200Department of Neurology, Royal Melbourne Hospital, Grattan St, Parkville, VIC 3050 Australia
| | - Gerard De Jong
- grid.416153.40000 0004 0624 1200Metabolic Diseases Unit, Royal Melbourne Hospital, Grattan St, Parkville, VIC 3050 Australia
| | - Mark Walterfang
- Neuropsychiatry Unit, Royal Melbourne Hospital, Grattan St, Parkville, VIC, 3050, Australia. .,Department of Psychiatry, University of Melbourne, Parkville, VIC, 3010, Australia. .,Melbourne Neuropsychiatry Centre, University of Melbourne, Parkville, VIC, 3010, Australia.
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Page I, Gaillard F. Erratum to “Is a trident or a bident? Appearance of a primitive trigeminal artery on sagittal views – Question and Is a trident or a bident? Appearance of a primitive trigeminal artery on sagittal views – Answer” [J. Clin. Neurosci. 75C (2020) 204–205 and 240–241]. J Clin Neurosci 2020. [DOI: 10.1016/j.jocn.2020.07.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Page I, Gaillard F. Is a trident or a bident? Appearance of a primitive trigeminal artery on sagittal views. J Clin Neurosci 2020. [DOI: 10.1016/j.jocn.2020.02.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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30
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Wong M, Brennan D, Gaillard F. Unusual enhancement patterns from inadvertent arterial contrast injection during CT angiography. J Clin Neurosci 2020; 78:406-408. [PMID: 32360165 DOI: 10.1016/j.jocn.2020.04.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 04/16/2020] [Indexed: 11/29/2022]
Abstract
Investigation of cerebrovascular incidents typically involve non-contrast intracranial computed tomography (CT) and CT angiography (CTA) of the arch of aorta to vertex with or without CT perfusion. Though rare, inadvertent direct arterial contrast injection is a potentially serious complication which can alter contrast distribution and timing resulting in non-diagnostic intracranial studies. If unnoticed, they can be misinterpreted as pathology leading to further unnecessary investigations, increasing patient radiation dose and delaying appropriate management. To date, there have been two documented case reports describing arterial contrast injection in cerebral CTA or CT perfusion. We describe two further cases of arterial contrast administration. Furthermore, by describing various contrast enhancement patterns in normal and variant anatomy - such as bovine aortic arch, vertebral artery dominance, posterior inferior cerebellar artery (PICA) continuation of vertebral artery and fetal posterior communicating artery (PCOM) - we hope to improve clinician recognition of inadvertent arterial contrast injection in a timely fashion.
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Affiliation(s)
- Monica Wong
- Radiology Department, Royal Melbourne Hospital, Parkville, Melbourne, Victoria, Australia
| | - Daniel Brennan
- Radiology Department, Royal Melbourne Hospital, Parkville, Melbourne, Victoria, Australia
| | - Frank Gaillard
- Radiology Department, Royal Melbourne Hospital, Parkville, Melbourne, Victoria, Australia; Faculty of Medicine, Dentistry, and Health Sciences at the University of Melbourne, Parkville, Melbourne, Victoria, Australia.
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31
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McArdle DJT, Gaillard F. Pernicious azotaemia? A case series of subacute combined degeneration of the cord secondary to nitrous oxide abuse. J Clin Neurosci 2020; 72:277-280. [PMID: 31937498 DOI: 10.1016/j.jocn.2019.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 10/05/2019] [Accepted: 11/09/2019] [Indexed: 11/20/2022]
Abstract
Nitrous oxide abuse is a rare cause of vitamin B12 deficiency and consequent subacute combined degeneration of the spinal cord. Worldwide and Australian statistics indicate that recreational use of nitrous oxide is increasing. We report four cases of females aged 18-24 years presenting with clinical symptoms of subacute combined degeneration of the spinal cord. MRI during admission demonstrated the classic findings of T2 hyperintensity, predominantly within the dorsal columns of the spinal cord, with variable involvement of the lateral corticospinal tracts. These cases highlight the ready availability of nitrous oxide and the fact that heavy prolonged recreational use is occurring in the community. It is important that clinicians in emergency and community settings are alerted to this unusual cause of subacute combined degeneration of the spinal cord because early aggressive vitamin B12 replacement together with behavioural change can reverse this disabling neurological syndrome.
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Affiliation(s)
- David John Tobias McArdle
- Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia; Faculty of Medicine, Dentistry, and Health Sciences at the University of Melbourne, Parkville, Australia.
| | - Frank Gaillard
- Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia; Faculty of Medicine, Dentistry, and Health Sciences at the University of Melbourne, Parkville, Australia
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32
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Su S, McArdle D, Gaillard F. Post-shunting corpus callosal signal change and review of the literature. J Clin Neurosci 2019; 72:466-468. [PMID: 31874812 DOI: 10.1016/j.jocn.2019.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 12/01/2019] [Indexed: 10/25/2022]
Abstract
MRI signal changes in the corpus callosum can be seen in 8.3% of patients following shunt insertion for obstructive hydrocephalus. Several causes have been hypothesised, including mechanical compression, decompression associated oedema and ischaemia, and overshunting. We present a case of a patient with a pineal tumour of intermediate differentiation (WHO grade III), which had caused long-term obstructive hydrocephalus due to compression of the tectal plate and cerebral aqueduct. Following insertion of a shunt, prominent changes in the corpus callosum became evident on CT and MRI characterised by oedema and swelling, particularly affecting the dorsal surface of the corpus callosum. This pattern of signal change, although dramatic, should not be mistaken for other pathologies.
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Affiliation(s)
- Shu Su
- Department of Radiology, The Royal Melbourne Hospital, Parkville, VIC, Australia.
| | - David McArdle
- Department of Radiology, The Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Frank Gaillard
- Department of Radiology, The Royal Melbourne Hospital, Parkville, VIC, Australia; Faculty of Medicine, Dentistry, and Health Sciences at the University of Melbourne, Parkville, Australia
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Dahan A, Pereira R, Malpas CB, Kalincik T, Gaillard F. PACS Integration of Semiautomated Imaging Software Improves Day-to-Day MS Disease Activity Detection. AJNR Am J Neuroradiol 2019; 40:1624-1629. [PMID: 31515214 DOI: 10.3174/ajnr.a6195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 07/19/2019] [Indexed: 01/06/2023]
Abstract
BACKGROUND AND PURPOSE The standard for evaluating interval radiologic activity in MS, side-by-side MR imaging comparison, is restricted by its time-consuming nature and limited sensitivity. VisTarsier, a semiautomated software for comparing volumetric FLAIR sequences, has shown better disease-activity detection than conventional comparison in retrospective studies. Our objective was to determine whether implementing this software in day-to-day practice would show similar efficacy. MATERIALS AND METHODS VisTarsier created an additional coregistered image series for reporting a color-coded disease-activity change map for every new MS MR imaging brain study that contained volumetric FLAIR sequences. All other MS studies, including those generated during software-maintenance periods, were interpreted with side-by-side comparison only. The number of new lesions reported with software assistance was compared with those observed with traditional assessment in a generalized linear mixed model. Questionnaires were sent to participating radiologists to evaluate the perceived day-to-day impact of the software. RESULTS Nine hundred six study pairs from 538 patients during 2 years were included. The semiautomated software was used in 841 study pairs, while the remaining 65 used conventional comparison only. Twenty percent of software-aided studies reported having new lesions versus 9% with standard comparison only. The use of this software was associated with an odds ratio of 4.15 for detection of new or enlarging lesions (P = .040), and 86.9% of respondents from the survey found that the software saved at least 2-5 minutes per scan report. CONCLUSIONS VisTarsier can be implemented in real-world clinical settings with good acceptance and preservation of accuracy demonstrated in a retrospective environment.
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Affiliation(s)
- A Dahan
- From the Department of Radiology (A.D.), Austin Hospital, Heidelberg, Australia
| | - R Pereira
- Departments of Radiology (R.P., F.G.)
- Department of Radiology (R.P.), University of Queensland, Brisbane, Queensland, Australia
| | - C B Malpas
- Neurology (T.K., C.M.), Royal Melbourne Hospital, Parkville, Victoria, Australia
- Clinical Outcomes Research Unit (CORe) (C.M., T.K.)
| | - T Kalincik
- Neurology (T.K., C.M.), Royal Melbourne Hospital, Parkville, Victoria, Australia
- Clinical Outcomes Research Unit (CORe) (C.M., T.K.)
| | - F Gaillard
- Departments of Radiology (R.P., F.G.)
- Departments of Medicine and Radiology (F.G.), University of Melbourne, Melbourne, Australia
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Gaillard F, Jacquemont L, Roberts V, Macher M, Hourmant M, Legendre C. Caractéristiques et risque d’insuffisance rénale terminale des donneurs vivants de rein entre 2007 et 2017. Nephrol Ther 2019. [DOI: 10.1016/j.nephro.2019.07.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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35
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Azriel A, Towner JE, Gaillard F, Box G, Rogers T, Morokoff A. Solitary intraventricular Hodgkin lymphoma post-transplant lymphoproliferative disease (HL-PTLD): Case report. J Clin Neurosci 2019; 69:269-272. [PMID: 31451379 DOI: 10.1016/j.jocn.2019.08.053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 08/06/2019] [Indexed: 11/16/2022]
Abstract
Lymphomas affecting the central nervous system (CNS), both primarily and secondarily, are uncommon malignancies. Immunosuppressed states, including iatrogenic immunosuppression following organ transplantation, are the most significant risk factors for developing primary CNS lymphoma (PCNSL). Post-transplant lymphoproliferative disease (PTLD) is a well described complication following bone marrow or solid organ transplantation. PTLD is usually a systemic disease with occasional CNS involvement. The incidence of CNS involvement in PTLD is low, and the majority of these cases tend to be PCNSL. Hodgkin lymphoma PTLD (HL-PTLD) constitutes only a very small percentage of PTLD. We report a rare case of a primary intraventricular CNS classical HL-PTLD in a male patient, 18 years following renal transplantation. The location allowed for safe neurosurgical intervention which resolved the symptom of elevated intracranial pressure and allowed for induction of a Rituximab-based chemotherapy regimen. Both the ventricular location of the PTLD and Hodgkin Lymphoma PTLD are themselves individually quite rare and have not previously been reported together. The unique location allowed safe neurosurgical intervention which quickly resolved the symptom of elevated intracranial pressure and allowed for induction of a Rituximab-based chemotherapy regimen.
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Affiliation(s)
- Amit Azriel
- Department of Neurosurgery, The Royal Melbourne Hospital, Victoria, Australia; Department of Surgery, The University of Melbourne, Victoria, Australia.
| | - James E Towner
- Department of Neurosurgery, The Royal Melbourne Hospital, Victoria, Australia; Department of Neurosurgery, University of Rochester Medical Center, Rochester, NY, USA
| | - Frank Gaillard
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Victoria, Australia; Faculty of Medicine, Dentistry, and Health Sciences, The University of Melbourne, Australia
| | - Georgia Box
- Department of Radiology, The Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - TeWhiti Rogers
- Department of Pathology, The Royal Melbourne Hospital, Victoria, Australia
| | - Andrew Morokoff
- Department of Neurosurgery, The Royal Melbourne Hospital, Victoria, Australia; Department of Surgery, The University of Melbourne, Victoria, Australia
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Abstract
OBJECTIVE Based on the experiences of neuroimaging psychiatry registrars, we describe several reflections on improving the understanding and integration of magnetic resonance imaging in clinical psychiatry. CONCLUSION Better integration of magnetic resonance imaging into clinical psychiatry can be highly productive when our investments are focused on understanding the gaps in clinical knowledge and the systemic barriers involving the patient and relevant clinicians.
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Affiliation(s)
- Pierre Wibawa
- Neuroimaging Fellow & Psychiatry Registrar, Neuropsychiatry Unit, Royal Melbourne Hospital, Melbourne, VIC, and; Honorary Clinical Fellow, Department of Psychiatry, University of Melbourne, VIC, Australia
| | - Thomas Rego
- Neuroimaging Fellow & Psychiatry Registrar, Neuropsychiatry Unit, Royal Melbourne Hospital, Parkville, VIC, and; Honorary Clinical Fellow, Department of Psychiatry, University of Melbourne, VIC, Australia
| | - Dennis Velakoulis
- Consultant Neuropsychiatrist, Neuropsychiatry Unit, Royal Melbourne Hospital, Parkville, VIC, and; Professor, Melbourne Neuropsychiatry Centre, University of Melbourne, VIC, Australia
| | - Frank Gaillard
- Consultant Neuroradiologist, Department of Radiology, Royal Melbourne Hospital, Parkville, VIC, and; Associate Professor, Faculty of Medicine, Dentistry & Health Sciences, University of Melbourne, VIC, Australia
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Cavoué T, Caravaca A, Kalaitzidou I, Gaillard F, Rieu M, Viricelle J, Vernoux P. Ethylene epoxidation on Ag/YSZ electrochemical catalysts: Understanding of oxygen electrode reactions. Electrochem commun 2019. [DOI: 10.1016/j.elecom.2019.106495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Lasocki A, Gaillard F. Non-Contrast-Enhancing Tumor: A New Frontier in Glioblastoma Research. AJNR Am J Neuroradiol 2019; 40:758-765. [PMID: 30948373 DOI: 10.3174/ajnr.a6025] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 02/05/2019] [Indexed: 11/07/2022]
Abstract
There is a growing understanding of the prognostic importance of non-contrast-enhancing tumor in glioblastoma, and recent attempts at more aggressive management of this component using neurosurgical resection and radiosurgery have been shown to prolong survival. Optimizing these therapeutic strategies requires an understanding of the features that can distinguish non-contrast-enhancing tumor from other processes, in particular vasogenic edema; however, the limited and heterogeneous manner in which it has been defined in the literature limits clinical translation. This review covers pertinent literature on our growing understanding of non-contrast-enhancing tumor and focuses on key conventional MR imaging features for improving its delineation. Such features include subtle differences in the degree of FLAIR hyperintensity, gray matter involvement, and focal mass effect. Improved delineation of tumor from edema will facilitate more aggressive management of this component and potentially realize associated survival benefits.
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Affiliation(s)
- A Lasocki
- From the Department of Cancer Imaging (A.L.), Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia .,Sir Peter MacCallum Departments of Oncology (A.L.)
| | - F Gaillard
- Radiology (F.G.), University of Melbourne, Parkville, Victoria, Australia.,Department of Radiology (F.G.), Royal Melbourne Hospital, Parkville, Victoria, Australia
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Su S, Yang N, Gaillard F. Invisible cortex sign: A highly accurate feature to localize the inferolateral central sulcus. J Med Imaging Radiat Oncol 2019; 63:439-445. [PMID: 30874376 DOI: 10.1111/1754-9485.12875] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 02/17/2019] [Indexed: 12/13/2022]
Abstract
INTRODUCTION The central sulcus is a key landmark on MRI of the brain, but its inferolateral portion is difficult to identify if unable to trace the sulcus superoinferiorly. The authors observed that the cortex abutting the central sulcus appears isointense to the adjacent white matter on DWI, we named this the 'invisible cortex sign' and our study evaluates whether it could be used to identify the inferolateral central sulcus. METHODS Observational study of 108 consecutive 'normal' MRI studies performed from May 2016 to January 2017. A single axial DWI image - obtained in the anterior commissure-posterior commissure plane - was selected from each scan just above the subcentral gyrus such that it included the most inferolateral portion of the central sulcus. These single images were given to 10 readers (neuroradiologists, a neuroradiology fellow and radiology trainees) who marked the central sulcus based on the presence of the 'invisible cortex sign'. Their accuracy in identifying the central sulcus was compared with that of the principal investigators, who used tri-planar T1 volumetric MRI sequences. RESULTS One hundred and eight consecutive patients (55 female, 53 male) were selected, ranging from 18 to 81 years old (mean = 40.5, σ = 18.2). The central sulcus was correctly identified in 95.5% of cases (σ = 3.7%; range 89.4-99.1%). CONCLUSION The 'invisible cortex sign' is a highly accurate method of identifying the inferolateral central sulcus on a single axial DWI slice without relying on the more superior aspects of the sulcus.
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Affiliation(s)
- Shu Su
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Natalie Yang
- Department of Radiology, The Austin Hospital, Melbourne, Victoria, Australia
| | - Frank Gaillard
- Department of Radiology, The Royal Melbourne Hospital, Melbourne, Victoria, Australia.,Department of Radiology, The University of Melbourne, Melbourne, Victoria, Australia
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Seah JCY, Tang JSN, Kitchen A, Gaillard F, Dixon AF. Chest Radiographs in Congestive Heart Failure: Visualizing Neural Network Learning. Radiology 2019; 290:514-522. [DOI: 10.1148/radiol.2018180887] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jarrel C. Y. Seah
- From the Department of Radiology, Alfred Hospital, 55 Commercial Rd, Melbourne, Victoria 3004, Australia (J.C.Y.S., A.F.D.); Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia (J.S.N.T., F.G.); Melbourne, Australia (A.K.); and Department of Radiology, Melbourne University, Melbourne, Australia (F.G.)
| | - Jennifer S. N. Tang
- From the Department of Radiology, Alfred Hospital, 55 Commercial Rd, Melbourne, Victoria 3004, Australia (J.C.Y.S., A.F.D.); Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia (J.S.N.T., F.G.); Melbourne, Australia (A.K.); and Department of Radiology, Melbourne University, Melbourne, Australia (F.G.)
| | - Andy Kitchen
- From the Department of Radiology, Alfred Hospital, 55 Commercial Rd, Melbourne, Victoria 3004, Australia (J.C.Y.S., A.F.D.); Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia (J.S.N.T., F.G.); Melbourne, Australia (A.K.); and Department of Radiology, Melbourne University, Melbourne, Australia (F.G.)
| | - Frank Gaillard
- From the Department of Radiology, Alfred Hospital, 55 Commercial Rd, Melbourne, Victoria 3004, Australia (J.C.Y.S., A.F.D.); Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia (J.S.N.T., F.G.); Melbourne, Australia (A.K.); and Department of Radiology, Melbourne University, Melbourne, Australia (F.G.)
| | - Andrew F. Dixon
- From the Department of Radiology, Alfred Hospital, 55 Commercial Rd, Melbourne, Victoria 3004, Australia (J.C.Y.S., A.F.D.); Department of Radiology, Royal Melbourne Hospital, Melbourne, Australia (J.S.N.T., F.G.); Melbourne, Australia (A.K.); and Department of Radiology, Melbourne University, Melbourne, Australia (F.G.)
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Ravindran K, Sim K, Gaillard F. Magnetic resonance characterization of the 'dot sign' in colloid cysts of the third ventricle. J Clin Neurosci 2018; 62:133-137. [PMID: 30497855 DOI: 10.1016/j.jocn.2018.11.042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 11/10/2018] [Indexed: 10/27/2022]
Abstract
PURPOSE To determine the incidence of the 'dot sign' in patients with colloid cysts of the third ventricle and to characterise its MRI appearances. MATERIALS AND METHODS Single institution retrospective analysis between January 2007 and October 2016 of all patients with either an imaging or imaging and histology-confirmed diagnosis of colloid cysts of the 3rd ventricle was undertaken. For all cases, MRI signal intensities of the cyst fluid component were graded by two independent radiologists relative to brain parenchyma. Presence of a dot, and if present, its size and relative position within the cyst were recorded. Signal intensities of the dot were then similarly assessed. RESULTS 37 cases of colloid cyst were identified. Of these 37.8% (n = 14) demonstrated the dot sign. The majority (11 of 14) were observed inferiorly within the cyst; two cases were anteroinferior, and one other was posterior. All identified intracystic nodules displayed low signal intensity with respect to cyst fluid on T2 weighted sequences, and only two nodules were hypointense to fluid on T1-weighted imaging, with the remainder either iso- or hyperintense. CONCLUSIONS An intracystic low T2 'dot' is a common MRI feature of colloid cysts of the third ventricle, and to our knowledge not previously systematically described. Presence of such a dot should not only not dissuade from a diagnosis of colloid cyst being made, but should in fact be used to strengthen the imaging diagnosis.
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Affiliation(s)
- Krishnan Ravindran
- Department of Radiology, The Royal Melbourne Hospital, Parkville, VIC, Australia.
| | - Kenneth Sim
- Department of Radiology, The Royal Melbourne Hospital, Parkville, VIC, Australia
| | - Frank Gaillard
- Department of Radiology, The Royal Melbourne Hospital, Parkville, VIC, Australia; Department of Radiology, The University of Melbourne, Parkville, VIC, Australia
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Adams M, Chen W, Holcdorf D, McCusker MW, Howe PD, Gaillard F. Computer vs human: Deep learning versus perceptual training for the detection of neck of femur fractures. J Med Imaging Radiat Oncol 2018; 63:27-32. [PMID: 30407743 DOI: 10.1111/1754-9485.12828] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 10/07/2018] [Indexed: 12/11/2022]
Abstract
INTRODUCTION To evaluate the accuracy of deep convolutional neural networks (DCNNs) for detecting neck of femur (NoF) fractures on radiographs, in comparison with perceptual training in medically-naïve individuals. METHODS This study extends a previous study that conducted perceptual training in medically-naïve individuals for the detection of NoF fractures on a variety of dataset sizes. The same anteroposterior hip radiograph dataset was used to train two DCNNs (AlexNet and GoogLeNet) to detect NoF fractures. For direct comparison with perceptual training results, deep learning was completed across a variety of dataset sizes (200, 320 and 640 images) with images split into training (80%) and validation (20%). An additional 160 images were used as the final test set. Multiple pre-processing and augmentation techniques were utilised. RESULTS AlexNet and GoogLeNet DCNNs NoF fracture detection accuracy increased with larger training dataset sizes and mildly with augmentation. Accuracy increased from 81.9% and 88.1% to 89.4% and 94.4% for AlexNet and GoogLeNet respectively. Similarly, the test accuracy for the perceptual training in top-performing medically-naïve individuals increased from 87.6% to 90.5% when trained on 640 images compared with 200 images. CONCLUSIONS Single detection tasks in radiology are commonly used in DCNN research with their results often used to make broader claims about machine learning being able to perform as well as subspecialty radiologists. This study suggests that as impressive as recognising fractures is for a DCNN, similar learning can be achieved by top-performing medically-naïve humans with less than 1 hour of perceptual training.
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Affiliation(s)
- Matthew Adams
- Radiology Department, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Weijia Chen
- School of Psychological Sciences, University of Melbourne, Melbourne, Victoria, Australia
| | - David Holcdorf
- Radiology Department, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Mark W McCusker
- Radiology Department, Royal Melbourne Hospital, Melbourne, Victoria, Australia.,Radiology Department, University of Melbourne, Melbourne, Victoria, Australia
| | - Piers Dl Howe
- School of Psychological Sciences, University of Melbourne, Melbourne, Victoria, Australia
| | - Frank Gaillard
- Radiology Department, Royal Melbourne Hospital, Melbourne, Victoria, Australia.,Radiology Department, University of Melbourne, Melbourne, Victoria, Australia
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Gaillard F, Courbebaisse M, Kamar N, Couzi L, Gatault P, Dubourg L, Moulin B, Legendre C, Delanaye P, Mariat C. Impact de l’âge sur le niveau de DFG mesuré acceptable pour le don vivant de rein. Nephrol Ther 2018. [DOI: 10.1016/j.nephro.2018.07.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gaillard F, Gribouval O, Courbebaisse M, Fournier C, Antignac C, Legendre C, Servais A. Comparaison de la fonction rénale à 1 an entre les donneurs vivants de rein caucasiens et d’origine africaine présentant un génotype APOL1 à faible risque d’insuffisance rénale terminale. Nephrol Ther 2018. [DOI: 10.1016/j.nephro.2018.07.403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gaillard F, Courbebaisse M, Kamar N, Rostaing L, Girerd S, Flamant M, Moulin B, Legendre C, Delanaye P, Mariat C. Impact de la technique d’évaluation du DFG sur l’éligibilité au don des donneurs vivants de rein. Nephrol Ther 2018. [DOI: 10.1016/j.nephro.2018.07.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gaillard F, samson E, Rauscent H, Bonan I. Investigations of the effects of mirror therapy in children with unilateral cerebral palsy. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.1311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gaillard F, Samson E, Rauscent H, Bonan I. Investigations of the effects of mirror therapy in children with unilateral cerebral palsy. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Murphy A, Skalski M, Gaillard F. The utilisation of convolutional neural networks in detecting pulmonary nodules: a review. Br J Radiol 2018; 91:20180028. [PMID: 29869919 DOI: 10.1259/bjr.20180028] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Lung cancer is one of the leading causes of cancer-related fatality in the world. Patients display few or even no signs or symptoms in the early stages, resulting in up to 75% of patients diagnosed in the later stages of the disease. Consequently, there has been a call for lung cancer screening amongst at-risk populations. The early detection of malignant pulmonary nodules in CT is one of the suggested methods proposed to diagnose early-stage lung cancer; however, the reported sensitivity of radiologists' ability to accurately detect pulmonary nodules ranges widely from 30 to 97%. 2012 saw Alex Krizhevsky present a paper titled "ImageNet Classification with Deep Convolutional Networks" in which a multilayered convolutional computational model known as a convolutional neural network (CNN) was confirmed competent in identifying and classifying 1.2 million images to a previously unseen level of accuracy. Since then, CNNs have gained attention as a potential tool in aiding radiologists' detection of pulmonary nodules in CT imaging. This review found the use of CNN is a viable strategy to increase the overall sensitivity of pulmonary nodule detection. Small, non-validated data sets, computational constraints, and incomparable studies are currently limited factors of the existing research.
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Affiliation(s)
- Andrew Murphy
- 1 Discipline of Medical Radiation Sciences, Faculty of Health Sciences, The University of Sydney , Sydney, NSW , Australia.,2 Department of Medical Imaging, Princess Alexandra Hospital , Brisbane, QLD , Australia
| | - Matthew Skalski
- 3 Department of Radiology, Southern California University of Health Sciences , Whittier, CA , USA
| | - Frank Gaillard
- 4 Department of Radiology, University of Melbourne , Parkville, VIC , Australia.,5 Department of Radiology, The Royal Melbourne Hospital , Parkville, VIC , Australia
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Magréault S, Grondin C, Gaillard F, Soichot M, Lamoureux C, Nefau T, Bourgogne E. Intérêts de la cartographie des substances psychoactives consommées en milieu festif : retour sur la collecte de l’été 2016 en Poitou-Charentes. Toxicologie Analytique et Clinique 2018. [DOI: 10.1016/j.toxac.2018.04.095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Abstract
BACKGROUND AND PURPOSE The 2016 revision of the World Health Organization Classification of Tumors of the Central Nervous System mandates codeletion of chromosomes 1p and 19q for the diagnosis of oligodendroglioma. We studied whether conventional MR imaging features could predict 1p/19q status. MATERIALS AND METHODS Patients with previous 1p/19q testing were identified through pathology department records, typically performed on the basis of an oligodendroglial component on routine histology; 69 patients met the inclusion criteria. Preoperative imaging of patients with grade II or III gliomas was retrospectively assessed by 2 neuroradiologists, blinded to the 1p/19q status. Thirteen MR imaging features were first assessed in a small initial cohort (n = 10), after which the criteria were narrowed for the remaining patients as a validation cohort. RESULTS There was 85% agreement between radiologists for the overall prediction of 1p/19q status in the validation cohort, with an accuracy of 84%. The presence of >50% T2-FLAIR mismatch and calcification was found to be the most useful for predicting 1p/19q status. The >50% T2-FLAIR mismatch variable was demonstrated in 14 tumors and had 100% specificity for identifying a noncodeleted tumor (P = .001), with 97% interobserver correlation. Calcification was visualized in 7 tumors, 6 of which were 1p/19q codeleted (specificity, 97%; P = .006), with 100% interobserver correlation. CONCLUSIONS The presence of >50% T2-FLAIR mismatch is highly predictive of a noncodeleted tumor, while calcifications suggest a 1p/19q codeleted tumor. If formal 1p/19q testing is not possible, a combined MR imaging-histologic assessment may improve the diagnostic accuracy over histology alone.
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Affiliation(s)
- A Lasocki
- From the Department of Cancer Imaging (A.L.), Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Department of Radiology (A.L., F.G.)
- Monash Imaging (A.L.), Monash Health, Clayton, Victoria, Australia
| | | | - A Gorelik
- Melbourne EpiCentre (A.G.)
- Departments of Medicine (A.G.)
| | - M Gonzales
- Department of Anatomical Pathology (M.G.), The Royal Melbourne Hospital, Parkville, Victoria, Australia
- Pathology (M.G.), The University of Melbourne, Parkville, Victoria, Australia
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