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Karaman AK, Özgen KH, Korkmazer B, Hamid R, Kübra Yıldırım H, Kemerdere R, Çomunoğlu N, Tanrıöver N, Arslan S, Kızılkılıç O. Comparison of MRI findings of hypothalamic-optic chiasmatic gliomas and craniopharyngiomas. Acta Radiol 2024:2841851241241527. [PMID: 38613353 DOI: 10.1177/02841851241241527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2024]
Abstract
BACKGROUND Differential diagnosis of hypothalamic-optic chiasmatic gliomas (HOCGs) and craniopharyngiomas on magnetic resonance imaging (MRI) can be quite challenging. PURPOSE To compare the MRI features of HOCGs and cranipharyngiomas. MATERIAL AND METHODS Patients diagnosed with HOCG or craniopharyngioma in histopathological evaluation between 2012 and 2022 and who underwent preoperative contrast-enhanced brain MRI were included. Various MRI features were retrospectively evaluated for each lesion: T2-weighted imaging and fluid attenuation inversion recovery hyperintensity, calcification, cystic change, T1-weighted (T1W) imaging hyperintensity of the cystic component, hemorrhage, involvement of sellar, suprasellar or other adjacent structures, lobulated appearance, presence of hydrocephalus, and contrast enhancement pattern. Apparent diffusion coefficient (ADC) values were also evaluated and compared. RESULTS Among 38 patients included, 13 (34%) had HOCG and 25 (66%) had craniopharyngioma. Craniopharyngiomas had a significantly higher rate of cystic changes, calcification, and T1W imaging hyperintensity of the cystic component than HOCGs (P <0.05). Of HOCGs, 92% had chiasm involvement, 23% had optic nerve involvement, and 31% had brain stem involvement. On the other hand, chiasm involvement was observed in 8% of craniopharyngiomas, but none had optic nerve and/or brain stem involvement (P <0.05). While 62% (8/13) of HOCGs had diffuse homogeneous enhancement, 80% (20/25) of craniopharyngiomas had a diffuse heterogeneous enhancement pattern. Mean ADC values were significantly higher in craniopharyngiomas compared to HOCGs (2.1 vs. 1.6 ×10-3mm2/s, P <0.05). CONCLUSION Although some neuroimaging findings may overlap, features such as presence of cyst and calcification, brain stem and optic pathway involvement, different enhancement patterns, and ADC values may be helpful in the differential diagnosis of HOCGs and craniopharyngiomas.
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Affiliation(s)
- Ahmet Kursat Karaman
- Department of Radiology, Sureyyapasa Chest Diseases and Thoracic Surgery Training Hospital, Istanbul, Turkey
| | - Kerime Hatun Özgen
- Department of Radiology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Bora Korkmazer
- Division of Neuroradiology, Department of Radiology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Rauf Hamid
- Department of Radiology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | | | - Rahşan Kemerdere
- Department of Neurosurgery, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Nil Çomunoğlu
- Department of Pathology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Necmettin Tanrıöver
- Department of Neurosurgery, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Serdar Arslan
- Division of Neuroradiology, Department of Radiology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Osman Kızılkılıç
- Division of Neuroradiology, Department of Radiology, Istanbul University-Cerrahpasa, Istanbul, Turkey
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2
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Mbekeani JN, Abdel Fattah M, Ul Haq A, Al Shail E, Ahmed M. Pediatric pilomyxoid astrocytoma - ophthalmic and neuroradiologic manifestations. Eur J Ophthalmol 2021; 32:2604-2614. [PMID: 34841927 DOI: 10.1177/11206721211055620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Joyce N Mbekeani
- Department of Surgery (Ophthalmology), 24502Jacobi Medical Center, Bronx, NY, USA.,Department of Ophthalmology & Visual Sciences, 2006Albert Einstein College of Medicine, Bronx, NY, USA
| | - Maaly Abdel Fattah
- Department of Ophthalmology, 37852King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia.,Department of Ophthalmology, 63526Cairo University, Cairo, Egypt
| | - Anwar Ul Haq
- Department of Neurosurgery, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia
| | - Essam Al Shail
- Department of Neurosurgery, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia.,288867Al Faisal University, Riyadh, Saudi Arabia
| | - Manzoor Ahmed
- Department of Radiology, 37532Sheikh Khalifa Medical City, Abu Dhabi, UAE
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3
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Failure to Thrive Revealing a Pilomyxoid Astrocytoma: An Uncommon Case Report with Literature Review. Case Rep Pediatr 2021; 2021:6670585. [PMID: 34616579 PMCID: PMC8490053 DOI: 10.1155/2021/6670585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 07/13/2021] [Accepted: 08/11/2021] [Indexed: 12/04/2022] Open
Abstract
Pilomyxoid astrocytoma (PMA) is a freshly described figure of low-grade neoplasms encountered in early childhood. Nevertheless, its precise classification by the World Health Organization (WHO) is still debatable. Making an exact diagnosis relies on histological and immunohistochemical pathognomonic features with specific radiological findings. PMA behaves aggressively with a shorter progression-free survival, and its management is unfortunately still arguable. We describe a rare case of PMA involving the suprasellar region who displays symptoms consistent with diencephalic syndrome. The diagnosis was made by magnetic resonance imaging (MRI) focused on the hypothalamic-pituitary axis, and the patient underwent a subtotal tumor resection combined with chemotherapy. Diagnosis of brain tumors should be kept in mind in young children with generalized and severe unexplained loss of subcutaneous fat with failure to thrive after ruling out classical causes.
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4
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Bag AK, Chiang J, Patay Z. Radiohistogenomics of pediatric low-grade neuroepithelial tumors. Neuroradiology 2021; 63:1185-1213. [PMID: 33779771 PMCID: PMC8295117 DOI: 10.1007/s00234-021-02691-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 03/10/2021] [Indexed: 12/14/2022]
Abstract
PURPOSE In addition to histology, genetic alteration is now required to classify many central nervous system (CNS) tumors according to the most recent World Health Organization CNS tumor classification scheme. Although that is still not the case for classifying pediatric low-grade neuroepithelial tumors (PLGNTs), genetic and molecular features are increasingly being used for making treatment decisions. This approach has become a standard clinical practice in many specialized pediatric cancer centers and will likely be more widely practiced in the near future. This paradigm shift in the management of PLGNTs necessitates better understanding of how genetic alterations influence histology and imaging characteristics of individual PLGNT phenotypes. METHODS The complex association of genetic alterations with histology, clinical, and imaging of each phenotype of the extremely heterogeneous PLGNT family has been addressed in a holistic approach in this up-to-date review article. A new imaging stratification scheme has been proposed based on tumor morphology, location, histology, and genetics. Imaging characteristics of each PLGNT entity are also depicted in light of histology and genetics. CONCLUSION This article reviews the association of specific genetic alteration with location, histology, imaging, and prognosis of a specific tumor of the PLGNT family and how that information can be used for better imaging of these tumors.
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Affiliation(s)
- Asim K Bag
- Department of Diagnostic Imaging, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Mail Stop 220, Memphis, TN, 38105, USA.
| | - Jason Chiang
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Zoltan Patay
- Department of Diagnostic Imaging, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Mail Stop 220, Memphis, TN, 38105, USA
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5
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Fomchenko EI, Reeves BC, Sullivan W, Marks AM, Huttner A, Kahle KT, Erson‐Omay EZ. Dual activating FGFR1 mutations in pediatric pilomyxoid astrocytoma. Mol Genet Genomic Med 2021; 9:e1597. [PMID: 33448156 PMCID: PMC8077124 DOI: 10.1002/mgg3.1597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 11/30/2020] [Accepted: 12/15/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Pilomyxoid astrocytomas are an aggressive subtype of astrocytoma, not graded by WHO, frequently located in hypothalamic/chiasmatic region, affecting diencephalic structures, and characterized by shorter survival and high recurrence rates. Pilomyxoid astrocytoma management remains controversial, with pathologic tissue diagnosis and relief of mass effect being the main goals of surgery while avoiding treatment-related morbidity, including vision loss, panhypopituitarism, and hypothalamic dysfunction. Chemotherapy (typically vincristine and carboplatin) in all pediatric patients and radiation therapy in pediatric patients over 5 years of age are used for treatment. METHODS We report clinical presentation, surgical management, and whole exome sequencing results in a pediatric patient with the subtotally resected pilomyxoid astrocytoma. RESULTS We identified two somatic activating missense mutations affecting FGFR1, including FGFR1 p.K656E and FGFR1 p.V561M. While the former is a known hotspot mutation that is both activating and transforming, the latter has been described as a gatekeeper mutation imparting resistance to FGFR inhibitors. Interestingly, both mutations were present with similar variant allele frequency within the tumor. CONCLUSION Similar variant allele frequencies of FGFR1 p.K656E and FGFR1 p.V561M mutations in our patient's tumor suggest that these mutations may have occurred at similar time points. Use of FGFR inhibitors in addition to STAT3 or PI3K/mTOR inhibition may prove a useful strategy in targeting our patient's pilomyxoid astrocytoma.
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Affiliation(s)
| | | | | | - Asher M. Marks
- Department of PediatricsHematology/OncologyYale School of MedicineNew HavenCTUSA
| | - Anita Huttner
- Department of PathologyYale School of MedicineNew HavenCTUSA
| | - Kristopher T. Kahle
- Department of NeurosurgeryYale School of MedicineNew HavenCTUSA
- Centers for Mendelian Genomics and Yale Program on NeurogeneticsYale School of MedicineNew HavenCTUSA
- Department Cellular & Molecular PhysiologyYale School of MedicineNew HavenCTUSA
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6
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Gader G, Belkahla G, Karmani N, Saadaoui K, Rkhami M, Kallel J, Zammel I, Badri M. Pediatric Cerebellar Pilomyxoid Astrocytoma: Clinical and Radiological Findings in Three Cases. Asian J Neurosurg 2020; 15:262-265. [PMID: 32656116 PMCID: PMC7335121 DOI: 10.4103/ajns.ajns_268_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 01/19/2020] [Indexed: 11/11/2022] Open
Abstract
Pilomyxoid astrocytomas (PMA) is a particular form of glial tumors distinct from pilocytic astrocytomas (PA). On the last 2016 WHO classification for CNS tumours, no definite grade assignment was proposed for these lesions. They may be more aggressive with a different clinical course compared to PA due to their greater propensity for local recurrence and cerebrospinal dissemination. Most cases arise from the hypothalamic region. Only few studies reported cerebellar localization of the lesion. We report 3 pediatric cases treated for pediatric PMA of the posterior fossa. Clinical, radiological, and prognostic features were reviewed. The age of our patients was between 1 and 9 years old. Signs of intracranial hypertension were found in all patients. One of them presented an increased head circumference and the 2 others had a cerebellar syndrome. Brain CT-scan and MRI displayed a large wellcircumscribed intra-axial solid and cystic posterior fossa tumor. Total surgical resection was performed for all tumors. After a 2 years follow up, no signs of recurrence were noticed. In the literature, PMA been reported with overwhelming majority in children aged between 2 months and 4 years. Despite of many pathological similarities with PAs, PMAs have some specific features in histology, leading to their identification as independent type of glioma. Radiological differential diagnosis between PMAs and Pas can be made using arterial spin labeling imaging, which shows low perfusion parameters in PAs. Clinical and radiological follow up are mandatory do to different natural history and higher rates of local recurrence of this tumor compared to PA. Prognosis is favorable when complete surgical exeresis is possible.
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Affiliation(s)
- Ghassen Gader
- Department of Neurosurgery, Trauma and Burns Center, Ben Arous, Tunisia
| | - Ghassen Belkahla
- Department of Neurosurgery, Trauma and Burns Center, Ben Arous, Tunisia
| | - Nadhir Karmani
- Department of Neurosurgery, National Institute of Neurology, Tunis, Tunisia
| | - Khalil Saadaoui
- Department of Neurosurgery, Universitary Hospital of Sahloul, Sousse, Tunisia
| | - Mouna Rkhami
- Department of Neurosurgery, Trauma and Burns Center, Ben Arous, Tunisia
| | - Jalel Kallel
- Department of Neurosurgery, National Institute of Neurology, Tunis, Tunisia
| | - Ihsèn Zammel
- Department of Neurosurgery, Trauma and Burns Center, Ben Arous, Tunisia
| | - Mohamed Badri
- Department of Neurosurgery, Trauma and Burns Center, Ben Arous, Tunisia
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7
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Ishi Y, Yamaguchi S, Hatanaka KC, Okamoto M, Motegi H, Kobayashi H, Terasaka S, Houkin K. Association of the FGFR1 mutation with spontaneous hemorrhage in low-grade gliomas in pediatric and young adult patients. J Neurosurg 2020; 134:733-741. [PMID: 32059187 DOI: 10.3171/2019.12.jns192155] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 12/02/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The authors aimed to investigate genetic alterations in low-grade gliomas (LGGs) in pediatric and young adult patients presenting with spontaneous hemorrhage. METHODS Patients younger than 30 years of age with a pathological diagnosis of World Health Organization (WHO) grade I or II glioma and who had undergone treatment at the authors' institution were retrospectively examined. BRAF V600E, FGFR1 N546/K656, IDH1 R132, IDH2 R172, and KIAA1549-BRAF (K-B) fusion genetic alterations were identified, and the presence of spontaneous tumoral hemorrhage was recorded. RESULTS Among 66 patients (39 with WHO grade I and 27 with grade II tumors), genetic analysis revealed K-B fusion in 18 (27.3%), BRAF V600E mutation in 14 (21.2%), IDH1/2 mutation in 8 (12.1%), and FGFR1 mutation in 4 (6.1%). Spontaneous hemorrhage was observed in 5 patients (7.6%); 4 of them had an FGFR1 mutation and 1 had K-B fusion. Univariate analysis revealed a statistically significant association of an FGFR1 mutation and a diencephalic location with spontaneous hemorrhage. Among 19 diencephalic cases including the optic pathway, hypothalamus, and thalamus, an FGFR1 mutation was significantly associated with spontaneous hemorrhage (p < 0.001). Four FGFR1 mutation cases illustrated the following results: 1) a 2-year-old female with pilomyxoid astrocytoma (PMA) harboring the FGFR1 K656E mutation presented with intraventricular hemorrhage (IVH); 2) a 6-year-old male with PMA harboring FGFR1 K656E and D652G mutations presented with intratumoral hemorrhage (ITH); 3) a 4-year-old female with diffuse astrocytoma harboring FGFR1 K656M and D652G mutations presented with IVH; and 4) a young adult patient with pilocytic astrocytoma with the FGFR1 N546K mutation presented with delayed ITH and IVH after 7 years of observation. CONCLUSIONS Although the mechanism remains unclear, the FGFR1 mutation is associated with spontaneous hemorrhage in pediatric and young adult LGG.
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Affiliation(s)
- Yukitomo Ishi
- 1Department of Neurosurgery, Hokkaido University School of Medicine, Kita-ku, Sapporo
| | - Shigeru Yamaguchi
- 1Department of Neurosurgery, Hokkaido University School of Medicine, Kita-ku, Sapporo
| | - Kanako C Hatanaka
- 2Department of Surgical Pathology, Hokkaido University Hospital, Kita-ku, Sapporo; and
| | - Michinari Okamoto
- 1Department of Neurosurgery, Hokkaido University School of Medicine, Kita-ku, Sapporo
| | - Hiroaki Motegi
- 1Department of Neurosurgery, Hokkaido University School of Medicine, Kita-ku, Sapporo
| | - Hiroyuki Kobayashi
- 1Department of Neurosurgery, Hokkaido University School of Medicine, Kita-ku, Sapporo.,3Department of Neurosurgery, Kashiwaba Neurosurgical Hospital, Toyohira-ku, Sapporo, Hokkaido, Japan
| | - Shunsuke Terasaka
- 1Department of Neurosurgery, Hokkaido University School of Medicine, Kita-ku, Sapporo.,3Department of Neurosurgery, Kashiwaba Neurosurgical Hospital, Toyohira-ku, Sapporo, Hokkaido, Japan
| | - Kiyohiro Houkin
- 1Department of Neurosurgery, Hokkaido University School of Medicine, Kita-ku, Sapporo.,3Department of Neurosurgery, Kashiwaba Neurosurgical Hospital, Toyohira-ku, Sapporo, Hokkaido, Japan
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8
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Ho CY, Supakul N, Patel PU, Seit V, Groswald M, Cardinal J, Lin C, Kralik SF. Differentiation of pilocytic and pilomyxoid astrocytomas using dynamic susceptibility contrast perfusion and diffusion weighted imaging. Neuroradiology 2019; 62:81-88. [PMID: 31676961 DOI: 10.1007/s00234-019-02310-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 10/15/2019] [Indexed: 11/27/2022]
Abstract
PURPOSE Pilocytic (PA) and pilomyxoid astrocytomas (PMA) are related low-grade tumors which occur predominantly in children. PMAs have a predilection for a supratentorial location in younger children with worse outcomes. However, the two have similar imaging characteristics. Quantitative MR sequences such as dynamic susceptibility contrast (DSC) perfusion and diffusion (DWI) were assessed for significant differences between the two tumor types and locations. METHODS A retrospective search for MRI with DSC and DWI on pathology-proven cases of PMA and PA in children was performed. Tumors were manually segmented on anatomic images registered to rCBV, K2, and ADC maps. Tumors were categorized as PA or PMA, with subclassification of supratentorial and infratentorial locations. Mean values were obtained for tumor groups and locations compared with Student's t test for significant differences with post hoc correction for multiple comparisons. ROC analysis for significant t test values was performed. Histogram evaluation was also performed. RESULTS A total of 49 patients met inclusion criteria. This included 30 patients with infratentorial PA, 8 with supratentorial PA, 6 with supratentorial PMA, and 5 with infratentorial PMA. Mean analysis showed significantly increased rCBV for infratentorial PMA (2.39 ± 1.1) vs PA (1.39 ± 0.16, p = 0.0006). ROC analysis for infratentorial PA vs PMA yielded AUC = 0.87 (p < 0.001). Histogram analysis also demonstrated a higher ADC peak location for PMA (1.8 ± 0.2) vs PA (1.56 ± 0.28). CONCLUSION PMA has a significantly higher rCBV than PA in the infratentorial space. DSC perfusion and diffusion MR imaging may be helpful to distinguish between the two tumor types in this location.
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Affiliation(s)
- Chang Y Ho
- Department of Radiology and Imaging Sciences, MRI Department, Indiana University School of Medicine, 705 Riley Hospital Drive, Indianapolis, IN, 46202, USA.
| | - Nucharin Supakul
- Department of Radiology and Imaging Sciences, MRI Department, Indiana University School of Medicine, 705 Riley Hospital Drive, Indianapolis, IN, 46202, USA
| | - Parth U Patel
- Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Vetana Seit
- Department of Radiology and Imaging Sciences, MRI Department, Indiana University School of Medicine, 705 Riley Hospital Drive, Indianapolis, IN, 46202, USA
| | - Michael Groswald
- Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Jeremy Cardinal
- Department of Radiology and Imaging Sciences, MRI Department, Indiana University School of Medicine, 705 Riley Hospital Drive, Indianapolis, IN, 46202, USA
| | - Chen Lin
- Department of Radiology and Imaging Sciences, MRI Department, Indiana University School of Medicine, 705 Riley Hospital Drive, Indianapolis, IN, 46202, USA
| | - Stephen F Kralik
- Department of Radiology, Texas Children's Hospital, Houston, USA
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9
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Suzuki T, Akamatsu Y, Oshida S, Aso K, Osakabe M, Kashimura H. A Case of Cisternal Pilocytic Astrocytoma Diagnosed with the Balanced Steady-State Free Precession Sequence for Magnetic Resonance Imaging: A Rare Cause of Subarachnoid Hemorrhage. World Neurosurg X 2019; 1:100003. [PMID: 31251309 PMCID: PMC6580896 DOI: 10.1016/j.wnsx.2018.100003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 12/06/2018] [Indexed: 11/29/2022] Open
Abstract
Objectives In approximately 15% of cases of spontaneous subarachnoid hemorrhage (SAH), an obvious source of bleeding cannot be identified by angiography; these are considered cases of SAH of unknown etiology. A rare case of cisternal pilocytic astrocytoma (PA) presenting with SAH is reported. The usefulness of the balanced steady-state free precession (bSSFP) sequence for magnetic resonance imaging (MRI) to detect small cisternal lesions is discussed. Case Description The case of a 73-year-old woman who developed repeated SAHs owing to a cisternal PA is presented. She experienced sudden onset of headache and vomiting, and brain computed tomography showed diffuse SAH, whereas angiography demonstrated normal vasculature. Follow-up imaging, including T1-weighted, T2-weighted, T1-weighted contrast-enhanced, and diffusion-weighted MRI, did not show any parenchymal or cisternal lesions, although computed tomography and fluid-attenuated inversion recovery MRI showed SAH in the same region. In contrast, the bSSFP sequence, taken as a different sequence on the same day, showed mixed-intensity reticular lesions in the left basal cistern, while neither hematoma nor positive findings were identified with the other sequences. Based on the radiologic finding and the repeated history of SAH, the lesions were partially removed 2 weeks after onset. Histological examination showed a PA. Conclusions Despite being extremely rare, a small cisternal lesion should be considered as a cause of SAH of unknown etiology. The bSSFP sequence may be useful for detecting cisternal lesions that may be missed on the routine MRI sequences.
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Affiliation(s)
- Taro Suzuki
- Department of Neurosurgery, Iwate Prefectural Chubu Hospital, Kitakami, Iwate, Japan
| | - Yosuke Akamatsu
- Department of Neurosurgery, Iwate Prefectural Chubu Hospital, Kitakami, Iwate, Japan
| | - Sotaro Oshida
- Department of Neurosurgery, Iwate Prefectural Chubu Hospital, Kitakami, Iwate, Japan
| | - Kenta Aso
- Department of Neurosurgery, Iwate Prefectural Chubu Hospital, Kitakami, Iwate, Japan
| | - Mitsumasa Osakabe
- Department of Molecular Diagnostic Pathology, Iwate Medical University, Uchimaru, Morioka, Iwate, Japan
| | - Hiroshi Kashimura
- Department of Neurosurgery, Iwate Prefectural Chubu Hospital, Kitakami, Iwate, Japan
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10
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Primary spinal pilocytic astrocytoma: clinical study with long-term follow-up in 16 patients and a literature review. Neurosurg Rev 2019; 43:719-727. [PMID: 31098788 DOI: 10.1007/s10143-019-01109-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 04/09/2019] [Accepted: 04/25/2019] [Indexed: 02/05/2023]
Abstract
Primary pilocytic astrocytoma (PA) of the spine is extremely rare and most published case series only include only a few patients. We attempted to explore the clinical features, radiological findings, and treatment outcomes of patients with spinal PA. Sixteen spinal PA patients who were surgically treated in our hospital between April 2008 and June 2018 were included in this retrospective study. An integrative analysis was performed regarding spinal PA patients by extracting from published studies on PubMed. The 16 patients with spinal PA included eight male and eight female patients with a mean age of 29.1 years. Ten cases (62.5%) had masses located in the cervical segments, five (31.3%) had masses in the thoracic segments, and one (6.2%) had masses in the sacral canal. All the patients were treated surgically with 13 gross total resections (GTRs, 81.3%) and three subtotal resections (STRs). The mean follow-up period was 40.4 months. These tumors accounted for a recurrence rate of 37.5% (6 of 16 patients) and no death during the follow-up periods. The influencing factors of recurrence were mainly STR, gene mutation (NF-1 and H2-K27M), and the number of segments involved. The mean recurrence-free survival duration was 19 months. The imaging features of spinal PA are heterogeneous, and the definitive diagnosis requires pathological support. GTR is the standard therapy for spinal PAs, although patients with GTR are still likely to relapse. The regular spinal magnetic resonance imaging follow-ups are required regardless of the resection status. Reoperation is feasible for patients with recurrence.
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11
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Pediatric Tumor Neuroradiology. Clin Neuroradiol 2019. [DOI: 10.1007/978-3-319-68536-6_36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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Bisdas S, D’Arco F. Pediatric Tumor Neuroradiology. Clin Neuroradiol 2019. [DOI: 10.1007/978-3-319-61423-6_36-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Bisdas S, D’Arco F. Pediatric Tumor Neuroradiology. Clin Neuroradiol 2019. [DOI: 10.1007/978-3-319-61423-6_36-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Karthigeyan M, Singhal P, Salunke P, Vasishta RK. Adult Pilomyxoid Astrocytoma with Hemorrhage in an Atypical Location. Asian J Neurosurg 2019; 14:300-303. [PMID: 30937060 PMCID: PMC6417295 DOI: 10.4103/ajns.ajns_164_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Pilomyxoid astrocytomas (PMAs) are generally seen in young children and tend to occur in the hypothalamic-chiasmatic region. Their presence in other parts of the brain in the nonpediatric age group is uncommon. In addition, hemorrhage in such low-grade tumors is an occasional event. We describe a case of PMA that presented with spontaneous bleed in an atypical location (temporoparietal region) in an adult. A concise literature of the cases of PMA which were associated with bleed is also presented. Occasionally, low-grade tumors such as PMA may present with bleed. These benign looking neoplasms behave differently from the commonly occurring pilocytic astrocytomas (PAs) and should be considered as a differential. It is important to differentiate these from PA, as the management and prognosis differs.
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Affiliation(s)
- Madhivanan Karthigeyan
- Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Prankul Singhal
- Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Pravin Salunke
- Department of Neurosurgery, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Rakesh Kumar Vasishta
- Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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15
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Abstract
Pilocytic and pilomyxoid astrocytomas are some of the most common gliomas in children and young adults. These gliomas are indolent neoplasms with long overall survival probability. The genetic characteristics of these neoplasms are well known, and our deepened understanding of their associated molecular alterations has led to the development of novel treatment strategies and approaches. Currently, we can account for some of the unusual behavior, such as oncogene-induced senescence, associated spontaneous regression, anaplastic transformation, and cerebrospinal dissemination, of these gliomas. Nevertheless, enigmatic issues continue to surround these chronic tumors. Here, we review the classical and uncommon clinical pathological and genetic features of these indolent gliomas.
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Affiliation(s)
- Cristine Ding
- Division of Neuropathology, Department of Pathology, UCSF School of Medicine, California, USA,Department of Pathology, Tan Tock Seng Hospital, Novena, Singapore
| | - Tarik Tihan
- Division of Neuropathology, Department of Pathology, UCSF School of Medicine, California, USA
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16
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Affiliation(s)
- Aashim Bhatia
- Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, TN
| | - Sumit Pruthi
- Department of Radiology and Pediatrics, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, TN; Department of Pediatric Neuroradiology, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, TN; Department of Pediatric Radiology, Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, TN
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17
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He J, Li X, Zhu W, Li C, Gong J. Posterior fossa pilomyxoid astrocytoma with spontaneous hemorrhage in pediatric patients. Childs Nerv Syst 2018; 34:149-153. [PMID: 28741227 DOI: 10.1007/s00381-017-3549-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 07/17/2017] [Indexed: 11/25/2022]
Abstract
OBJECT The tumor described in this report was unique because of its involvement with a posterior fossa spontaneous hemorrhage in a pediatric patient; such a case has never been previously described in cases of pilomyxoid astrocytomas and also rarely found in those of pilocytic astrocytomas. METHODS This report studied a rare case of posterior fossa pilomyxoid astrocytoma (PMA) with critical and dangerous spontaneous hemorrhage. A 7-year-old girl appeared at the outpatient clinic with sudden headache and vomiting. RESULTS The patient underwent gross total tumor resection via suboccipital Medline approach, and no evidence of residual or recurrent tumor was found on magnetic resonance images at two follow-up examinations which were respectively conducted 1 and 5 months after resection. CONCLUSION In this report, the authors reviewed the literature and discussed the clinical features and treatment of pilomyxoid astrocytoma. It is important to distinguish this tumor variant from the more indolent pilocytic astrocytoma.
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Affiliation(s)
- Jintao He
- Department of Pediatric Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, China
| | - Xiang Li
- Department of Pediatric Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, China
| | - Wanchun Zhu
- Department of Pediatric Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, China
| | - Chunde Li
- Department of Pediatric Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, China
| | - Jian Gong
- Department of Pediatric Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100050, China.
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100050, China.
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18
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Bernal García LM, Cabezudo Artero JM, García Moreno R, Marcelo Zamorano MB, Mayoral Guisado C. Fluorescence guided resection with 5-aminolevulinic acid of a pilomyxoid astrocytoma of the third ventricle. Neurocirugia (Astur) 2017; 28:251-256. [PMID: 28495088 DOI: 10.1016/j.neucir.2017.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 03/21/2017] [Accepted: 03/22/2017] [Indexed: 10/19/2022]
Abstract
Fluorescence-guided resection with 5-aminolevulinic acid has been shown to be useful in the resection of certain brain tumors other than high grade gliomas, facilitating the intraoperative differentiation of neoplastic tissue. The technique enables the surgeon to ensure that no tumor fragments remain, thereby achieving higher rates of complete resection. Tihan first described pilomyxoid astrocytomas in 1999. They are currently classified as grade II astrocytoma according to the WHO classification system and, because of their tendency to recur and their dissemination through the cerebrospinal fluid pathways, they are considered to be more aggressive than pilocytic astrocytoma. As a result, management of these tumors must be more aggressive, always aiming for complete macroscopic resection whenever possible. In this article, we present a case of pilomyxoid astrocytoma of the third ventricle in which the use of fluorescence-guided resection with 5-ALA facilitated complete resection. Imaging tests performed after five years revealed no signs of recurrence and no adjuvant radiotherapy or chemotherapy was required. This article also comprises a review of the literature concerning the characteristics and management of this tumor, which was recently considered to be a different histopathological entity.
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Affiliation(s)
| | | | - Rafael García Moreno
- Department of Neurosurgery, University Hospital Infanta Cristina, Badajoz, Spain
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19
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Longo M, Adams Perez J, Oliveira F, Antunes A, Vedolin L, Duarte JA. Pilomyxoid astrocytoma of the corpus callosum presenting with primary haemorrhage in an adolescent. BJR Case Rep 2017; 3:20150020. [PMID: 30363302 PMCID: PMC6159255 DOI: 10.1259/bjrcr.20150020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 10/20/2016] [Accepted: 10/25/2016] [Indexed: 11/17/2022] Open
Abstract
A 17-year-old male patient with history of intraventricular haemorrhage in 2007 underwent a brain MRI scan in 2013 owing to headache. Brain MRI scan showed an expansive lesion adjacent to the left lateral ventricle infiltrating the anterior portion of the corpus callosum. After surgery, pathology confirmed a pilomyxoid astrocytoma (PMA), an aggressive subtype of astrocytoma that occurs predominantly in the hypothalamic-chiasmatic region. On imaging, PMA presents as a tumour isointense on T1, hyperintense on T2 that enhanced heterogeneously with contrast. The T2 signal is higher than pilocytic astrocytoma, which indicates the presence of myxoid matrix. These findings on MRI scan have a direct correlation with a specific pathological finding—monomorphic proliferation of piloid cells in a mucopolysaccharide-rich matrix. These characteristics associated with the absence of Rosenthal fibres or eosinophilic granules indicated the diagnosis of PMA. To our knowledge, this is the first case report of PMA affecting the corpus callosum in an adolescent.
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Affiliation(s)
| | | | | | | | | | - Juliana Avila Duarte
- Magnetic Resonance Unit, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
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20
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Gaudino S, Martucci M, Russo R, Visconti E, Gangemi E, D'Argento F, Verdolotti T, Lauriola L, Colosimo C. MR imaging of brain pilocytic astrocytoma: beyond the stereotype of benign astrocytoma. Childs Nerv Syst 2017; 33:35-54. [PMID: 27757570 DOI: 10.1007/s00381-016-3262-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 10/03/2016] [Indexed: 01/21/2023]
Abstract
BACKGROUND Pilocytic astrocytoma (PA) is the most common pediatric brain glioma and is considered the prototype of benign circumscribed astrocytoma. Despite its low malignancy, the CT and MRI features of brain PA may resemble those of much more aggressive brain tumors. Misdiagnosis of PA is particularly easy when it demonstrates MR morphological and non-morphological findings that are inconsistent with its non-aggressive nature and that overlap with the features of more aggressive brain tumors. METHOD Basing on the evidence that the variation in the histological, genetic, and metabolic "fingerprint" for brain PA is dependent on tumor location, and the hypothesis that tumor location is related to the broad spectrum of morphological and non-morphological MR imaging findings, the authors discuss the MR imaging appearance of brain PA using a location-based approach to underline the typical and less typical imaging features and the main differential diagnosis of brain PA. A brief summary of the main pathological and clinical features, the natural history, and the treatment of brain PA is also provided. RESULT A combination of morphological and non-morphological MR imaging features and a site-based approach to differential diagnosis are required for a pre-operative diagnosis. The new "cutting-edge" MR imaging sequences have the potential to impact the ease and confidence of pediatric brain tumor interpretation and offer a more efficient diagnostic work-up. CONCLUSIONS Although the typical imaging features of brain pilocytic astrocytoma make radiological diagnosis relatively easy, an atypical and more aggressive appearance can lead to misdiagnosis. Knowing the broad spectrum of imaging characteristics on conventional and advanced MR imaging is important for accurate pre-operative radiological diagnosis and correctly interpreting changes during follow-up.
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Affiliation(s)
- Simona Gaudino
- Institute of Radiology, Fondazione Policlinico Universitario Agostino Gemelli, Largo A. Gemelli, 1, 00168, Rome, Italy.
| | - Matia Martucci
- Institute of Radiology, Fondazione Policlinico Universitario Agostino Gemelli, Largo A. Gemelli, 1, 00168, Rome, Italy
| | - Rosellina Russo
- Institute of Radiology, Fondazione Policlinico Universitario Agostino Gemelli, Largo A. Gemelli, 1, 00168, Rome, Italy
| | - Emiliano Visconti
- Institute of Radiology, Fondazione Policlinico Universitario Agostino Gemelli, Largo A. Gemelli, 1, 00168, Rome, Italy
| | - Emma Gangemi
- Institute of Radiology, Fondazione Policlinico Universitario Agostino Gemelli, Largo A. Gemelli, 1, 00168, Rome, Italy
| | - Francesco D'Argento
- Institute of Radiology, Fondazione Policlinico Universitario Agostino Gemelli, Largo A. Gemelli, 1, 00168, Rome, Italy
| | - Tommaso Verdolotti
- Institute of Radiology, Fondazione Policlinico Universitario Agostino Gemelli, Largo A. Gemelli, 1, 00168, Rome, Italy
| | - Libero Lauriola
- Institute of Pathological Anatomy, Fondazione Policlinico Universitario Agostino Gemelli, Largo A. Gemelli, 1, 00168, Rome, Italy
| | - Cesare Colosimo
- Institute of Radiology, Fondazione Policlinico Universitario Agostino Gemelli, Largo A. Gemelli, 1, 00168, Rome, Italy
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21
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Suprasellar pilocytic astrocytoma in an adult with hemorrhage and leptomeningeal dissemination: case report and review of literature. Radiol Case Rep 2016; 11:411-418. [PMID: 27920871 PMCID: PMC5128392 DOI: 10.1016/j.radcr.2016.08.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 08/08/2016] [Accepted: 08/21/2016] [Indexed: 11/28/2022] Open
Abstract
Pilocytic astrocytoma (PA) is a low-grade tumor. It has an excellent prognosis after total resection. Leptomeningeal dissemination and hemorrhage are very rare to be associated with PA and lead to unfavorable prognosis. A 35-year-old man was diagnosed with a hemorrhagic suprasellar PA in 2006. Subsequent examination in 2007 revealed another large subdural hemorrhagic lesion in the sacral region, which proved to be PA by histopathologic assessment. Other leptomeningeal foci were discovered mainly at the craniocervical junction. The patient underwent subtotal resection and received chemotherapy with disease control for 7 years. Progression of the disseminated disease has recently occurred; however, the patient is still alive with stable disease after radiotherapy. The radiological features, management, and relevant literature are also presented. Our report heightens the awareness of PA in the adult population and the importance of close surveillance for the leptomeningeal spread, especially for sellar region tumors.
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22
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Alcalde López J, Sánchez Garduño J. Astrocitoma pilomixoide holomedular en una lactante. RADIOLOGIA 2016; 58:415-7. [DOI: 10.1016/j.rx.2016.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 02/17/2016] [Accepted: 02/25/2016] [Indexed: 10/21/2022]
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23
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Wang Z, Yan HM, Zhou XR, Liu JK, Chang JY, Wang YT. Spontaneous intratumoural and intraventricular haemorrhage associated with a pilomyxoid astrocytoma in the hypothalamic/chiasmatic region. J Clin Neurosci 2016; 33:217-220. [PMID: 27450285 DOI: 10.1016/j.jocn.2016.03.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 01/31/2016] [Accepted: 03/14/2016] [Indexed: 11/27/2022]
Abstract
Pilomyxoid astrocytoma (PMA) is a rare, low-grade glioma that is recognised as a variant of pilocytic astrocytoma. There have been few reports on this pathologic entity presenting with spontaneous haemorrhage. In this study, we report a rare case of PMA in the hypothalamic/chiasmatic region presenting with intratumoural and intraventricular haemorrhage. An external ventricular drain was urgently inserted. A ventriculo-peritoneal shunt (VP) was undergone 4weeks thereafter. The patient received fractionated Gamma Knife radiosurgery in another hospital 3weeks after the VP shunt. Three months later, subtotal resection of the tumour was performed in our hospital via a pterional approach. The pathological diagnosis was PMA. Postoperatively, no adjuvant therapy was given, and the neurologic deficits were improved. However, the presentation of endocrine deficits remained. Notably, PMAs in the hypothalamic/chiasmatic region presenting with massive intratumoural and intraventricular haemorrhage may result in a severe condition and long-term impairment of endocrine function. Long-term follow-up is required to monitor the recurrence of the tumour and endocrinopathy.
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Affiliation(s)
- Zhe Wang
- Department of Neurosurgery, Wei Fang People's Hospital, 151 Guangwen Street, Weifang 261041, China
| | - Hong-Mei Yan
- Department of Neurosurgery, Wei Fang People's Hospital, 151 Guangwen Street, Weifang 261041, China.
| | - Xiu-Rong Zhou
- Department of Neurosurgery, Wei Fang People's Hospital, 151 Guangwen Street, Weifang 261041, China
| | - Jin-Kai Liu
- Department of Neurosurgery, Wei Fang People's Hospital, 151 Guangwen Street, Weifang 261041, China
| | - Jian-Yong Chang
- Department of Neurosurgery, Wei Fang People's Hospital, 151 Guangwen Street, Weifang 261041, China
| | - Yu-Ting Wang
- Department of Neurosurgery, Wei Fang People's Hospital, 151 Guangwen Street, Weifang 261041, China
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24
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Abstract
BACKGROUND The term pilomyxoid astrocytoma (PMA) was added to the World Health Organization Classification of Tumours of the central nervous system in 2007. Pilomyxoid tumors are grade II tumors, considered to be variants of pilocytic astrocytomas. We attempted to determine if positron emission tomography (PET), proliferative index (PI), and BRAF V600E mutation help better define PMAs. OBSERVATIONS We report 5 patients' clinical and neuroimaging findings, pathology (PI), and outcome. Four of the 5 patients had PET scans. Three patients showed [18F]fluoro-deoxyglucose hypermetabolism. The PI was elevated in all 5 cases and the BRAF V600E mutation was found in 3 of the 3 patients tested. CONCLUSION Our data suggest that PMAs are hypermetabolic on PET, have elevated PIs and BRAF V600E mutations, and behave aggressively.
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25
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Chen AS, Paldor I, Tsui AE, Yuen TI. Pilomyxoid astrocytoma in the adult cerebellum. J Clin Neurosci 2016; 27:170-3. [PMID: 26777083 DOI: 10.1016/j.jocn.2015.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Accepted: 11/21/2015] [Indexed: 10/22/2022]
Abstract
Pilomyxoid astrocytoma (PMA) is a recently recognised World Health Organization (WHO) Grade II tumour that was previously characterised as a subtype of the WHO Grade I pilocytic astrocytoma (PA). PMA has a histological appearance distinct from PA and a poorer prognosis due to its greater propensity for local recurrence and cerebrospinal dissemination. Although originally considered a paediatric tumour involving mainly the hypothalamic and chiasmatic region, reports of the lesion occurring in the adult population and other areas of the neuroaxis are emerging. We review the literature on PMA within the adult population and present the first case of PMA in the cerebellum of an adult female.
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Affiliation(s)
- Annie S Chen
- Department of Neurosurgery, Royal Melbourne Hospital, 300 Grattan Street, Parkville, VIC 3050, Australia
| | - Iddo Paldor
- Department of Neurosurgery, Royal Melbourne Hospital, 300 Grattan Street, Parkville, VIC 3050, Australia
| | - Alpha E Tsui
- Department of Anatomical Pathology, Royal Melbourne Hospital, VIC, Australia
| | - Tanya I Yuen
- Department of Neurosurgery, Royal Melbourne Hospital, 300 Grattan Street, Parkville, VIC 3050, Australia; Department of Surgery, Royal Melbourne Hospital, University of Melbourne, VIC, Australia.
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26
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Kim S, Kang M, Choi S, Kim DC. Pilomyxoid Astrocytoma Occurring in the Third Ventricle. J Clin Imaging Sci 2015; 5:41. [PMID: 26312139 PMCID: PMC4541165 DOI: 10.4103/2156-7514.161853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 07/09/2015] [Indexed: 11/04/2022] Open
Abstract
Pilomyxoid astrocytoma (PMA) is a rare central nervous system tumor that has been included in the 2007 World Health Organization Classification of Tumors of the Central Nervous System. Due to its more aggressive behavior, PMA is classified as Grade II neoplasm by the World Health Organization. PMA predominantly affects the hypothalamic/chiasmatic region and occurs in children (mean age of occurrence = 10 months). We report a case of a 24-year-old man who presented with headache, nausea, and vomiting. Brain CT and MRI revealed a mass occupying only the third ventricle. We performed partial resection. Histological findings, including monophasic growth with a myxoid background, and absence of Rosenthal fibers or eosinophilic granular bodies, as well as the strong positivity for glial fibrillary acidic protein were consistent with PMA.
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Affiliation(s)
- Sanghyeon Kim
- Department of Radiology, Dong-A University Medical Center, Seo-gu, Busan, Korea
| | - Myongjin Kang
- Department of Radiology, Dong-A University Medical Center, Seo-gu, Busan, Korea
| | - Sunseob Choi
- Department of Radiology, Dong-A University Medical Center, Seo-gu, Busan, Korea
| | - Dae Cheol Kim
- Department of Pathology, Dong-A University Medical Center, Seo-gu, Busan, Korea
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27
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Tjahjadi M, Arifin MZ, Sobana M, Avianti A, Caropeboka MS, Eka PA, Agustina H. Cystic pilomyxoid astrocytoma on suprasellar region in 7-year-old girl: Treatment and strategy. Asian J Neurosurg 2015; 10:154-7. [PMID: 25972955 PMCID: PMC4421961 DOI: 10.4103/1793-5482.154989] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Pilomyxoid astrocytoma (PMA) is a recently described entity with similar features to pilocytic astrocytoma but with a rare occurrence. As a new diagnosis, no treatment guideline of PMA has been established; but generally, as for any low-grade gliomas, radical resection is performed if the location is favorable. In this report, we wished to share our experience treating the PMA. The authors presented a case of a 7-year-old girl with bitemporal hemianopia. From the history, the patient had a 4-month history of headache, following with nausea and projectile vomiting 1 week before hospital admission. Past history of seizure, weakness of left extremities, and decreased consciousness were reported. Computed tomography (CT) scanning showed acute obstructive hydrocephalus and an isohypodense mass at suprasellar region with the cystic component. We performed ventriculo-peritoneal-shunt to reduce the acute hydrocephalus, followed by craniotomy tumor removal 2 weeks later. The patient underwent radiotherapy and medical rehabilitation. Diagnosis of PMA was made on the basis of pathologic anatomy result, which showed a myxoid background with pseudorosette. Postoperative CT showed a residual tumor at right parasellar area without hydrocephalus. After the surgery, the treatment was followed with radiotherapy for 20 times within 2 months. Postradiation CT performed 1-year later showed a significant reduction of the tumor mass. There were no new postoperative deficits. The patient had improvement of the visual field and motor strength. The authors reported a case of a 7-year-old girl with PMA. Surgical resection combined with radiotherapy was performed to control the growth of PMA. More observation and further studies are required to refine the treatment methods.
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Affiliation(s)
- Mardjono Tjahjadi
- Department of Neurosurgery, Medical Faculty of Padjadjaran University, Hasan Sadikin Hospital, Bandung, Indonesia
| | - M Zafrullah Arifin
- Department of Neurosurgery, Medical Faculty of Padjadjaran University, Hasan Sadikin Hospital, Bandung, Indonesia
| | - Mirna Sobana
- Department of Neurosurgery, Medical Faculty of Padjadjaran University, Hasan Sadikin Hospital, Bandung, Indonesia
| | - Astri Avianti
- Department of Neurosurgery, Medical Faculty of Padjadjaran University, Hasan Sadikin Hospital, Bandung, Indonesia
| | - M Sinatrya Caropeboka
- Department of Neurosurgery, Medical Faculty of Padjadjaran University, Hasan Sadikin Hospital, Bandung, Indonesia
| | - Priandana Adya Eka
- Department of Neurosurgery, Medical Faculty of Padjadjaran University, Hasan Sadikin Hospital, Bandung, Indonesia
| | - Hasrayati Agustina
- Department of Pathology Anatomy, Medical Faculty of Padjadjaran University, Hasan Sadikin Hospital, Bandung, Indonesia
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28
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A rare case of multicystic disseminated astrocytoma with pilomyxoid characteristics in a 4-year-old child. Childs Nerv Syst 2015; 31:625-9. [PMID: 25348811 DOI: 10.1007/s00381-014-2566-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 09/23/2014] [Indexed: 10/24/2022]
Abstract
Pilomyxoid astrocytomas are a more aggressive variant of pilocytic astrocytoma. Over the last 14 years, there has been increasing evidence to suggest that these tumours are distinct pathological entities to pilocytic astrocytomas. Radiological features of these tumours are slowly emerging in the neuroradiological literature. We report a unique radiological appearance of a multicystic, disseminated astrocytoma with pilomyxoid characteristics presenting in a 4-year-old boy and highlight the importance of considering this diagnosis with similar imaging.
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29
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Magnetic resonance imaging of sellar and juxtasellar abnormalities in the paediatric population: an imaging review. Insights Imaging 2015; 6:241-60. [PMID: 25794595 PMCID: PMC4376809 DOI: 10.1007/s13244-015-0401-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 02/11/2015] [Accepted: 02/17/2015] [Indexed: 12/18/2022] Open
Abstract
The sellar and juxtasellar regions in the paediatric population are complex both anatomically and pathologically, with magnetic resonance imaging (MRI) being the "gold standard" imaging modality due to the high contrast of detail. Assessment requires a detailed understanding of the anatomy, embryology, pathophysiology and normal signal characteristics of the pituitary gland and surrounding structures in order to appropriately characterise abnormalities. This article aims to provide an overview of the imaging characteristics of developmental/congenital and acquired disease processes which affect the sellar and juxtasellar region in the paediatric population. Main Messages • The sellar region is anatomically complex and covers a wide pathology spectrum. • MRI is the key imaging modality to assess sellar and juxtasellar pathology. • Numerous developmental anomalies may not be discovered until adulthood. • Knowledge of pathology alerts and guides the clinician towards appropriate management.
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30
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High accuracy of arterial spin labeling perfusion imaging in differentiation of pilomyxoid from pilocytic astrocytoma. Neuroradiology 2015; 57:527-33. [PMID: 25666232 DOI: 10.1007/s00234-015-1497-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 01/26/2015] [Indexed: 12/28/2022]
Abstract
INTRODUCTION Pilomyxoid astrocytoma (PMA) is a relatively new tumor entity which has been added to the 2007 WHO Classification of tumors of the central nervous system. The goal of this study is to utilize arterial spin labeling (ASL) perfusion imaging to differentiate PMA from pilocytic astrocytoma (PA). METHODS Pulsed ASL and conventional MRI sequences of patients with PMA and PA in the past 5 years were retrospectively evaluated. Patients with history of radiation or treatment with anti-angiogenic drugs were excluded. RESULTS A total of 24 patients (9 PMA, 15 PA) were included. There were statistically significant differences between PMA and PA in mean tumor/gray matter (GM) cerebral blood flow (CBF) ratios (1.3 vs 0.4, p < 0.001) and maximum tumor/GM CBF ratio (2.3 vs 1, p < 0.001). Area under the receiver operating characteristic (ROC) curves for differentiation of PMA from PA was 0.91 using mean tumor CBF, 0.95 using mean tumor/GM CBF ratios, and 0.89 using maximum tumor/GM CBF. Using a threshold value of 0.91, the mean tumor/GM CBF ratio was able to diagnose PMA with 77 % sensitivity, 100 % specificity, and a threshold value of 0.7, provided 88 % sensitivity and 86 % specificity. There was no statistically significant difference between the two tumors in enhancement pattern (p = 0.33), internal architecture (p = 0.15), or apparent diffusion coefficient (ADC) values (p = 0.07). CONCLUSION ASL imaging has high accuracy in differentiating PMA from PA. The result of this study may have important applications in prognostication and treatment planning especially in patients with less accessible tumors such as hypothalamic-chiasmatic gliomas.
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31
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Alkonyi B, Nowak J, Gnekow AK, Pietsch T, Warmuth-Metz M. Differential imaging characteristics and dissemination potential of pilomyxoid astrocytomas versus pilocytic astrocytomas. Neuroradiology 2015; 57:625-38. [PMID: 25666233 DOI: 10.1007/s00234-015-1498-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 01/26/2015] [Indexed: 12/25/2022]
Abstract
INTRODUCTION Pilomyxoid astrocytoma (PMA) is a rare WHO grade II tumor occurring most often in young children. PMA is associated with worse outcome as compared to the pathologically related pilocytic astrocytoma (PA). The radiological differentiation of PMAs from PAs is challenging. Furthermore, it is not completely clarified whether PMA is associated with a higher rate of cerebrospinal fluid (CSF) dissemination in the youngest pediatric population as compared to PA. The aim of our study was firstly to compare imaging features of these tumors and, secondly, to evaluate the occurrence of CSF dissemination. METHODS The study population included 15 children with PMA and 32 children with PA. The initial MRI and CT scans from the time of the diagnosis were retrospectively analyzed according to standardized criteria and the findings compared between the two tumor types. Furthermore, we also compared the occurrence of imaging evidences of CSF dissemination. RESULTS PMAs showed less frequently cystic components (p = 0.03) and never had large tumor cysts. Gadolinium enhancement of PMAs was more frequently homogeneous (p = 0.006). PMAs appeared to show more often intratumoral hemorrhages (p = 0.047). Within the subgroup of children <6 years of age, the PMA histology tended to have a larger effect on the occurrence of CSF dissemination than the age (p = 0.05 vs. 0.12). CONCLUSION Some imaging features like enhancement pattern or presence of cysts or hemorrhage may help differentiating these low-grade gliomas. Our results confirm previous scarce data suggesting a higher rate of CSF dissemination in PMAs, even in the youngest patient population.
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Affiliation(s)
- Bálint Alkonyi
- Department of Neuroradiology, Universitätsklinikum Würzburg, Josef-Schneider-Strasse 11, 97080, Würzburg, Germany,
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32
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Chourmouzi D, Papadopoulou E, Konstantinidis M, Syrris V, Kouskouras K, Haritanti A, Karkavelas G, Drevelegas A. Manifestations of pilocytic astrocytoma: a pictorial review. Insights Imaging 2014; 5:387-402. [PMID: 24789122 PMCID: PMC4035491 DOI: 10.1007/s13244-014-0328-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 03/26/2014] [Accepted: 03/27/2014] [Indexed: 10/25/2022] Open
Abstract
BACKGROUND Pilocytic astrocytoma can be challenging to diagnose. METHODS Its clinical presentations can differ, directly related to its size and location, and are relatively unreliable. Similarly, imaging findings also vary with the location of the pilocytic astrocytoma. RESULTS This review provides an overview of the different imaging findings regarding pilocytic astrocytomas using both conventional and advanced magnetic resonance imaging sequences according to tumour location; the findings are strongly related to the tumour's tendency to infiltrate surrounding structures, being able to carry out gross total resection, and finally the prognosis. CONCLUSIONS Knowledge of these imaging manifestations of pilocytic astrocytoma may be helpful to arrive at an accurate diagnosis. TEACHING POINTS • To recognise the various imaging findings of pilocytic astrocytoma on both conventional and advanced magnetic resonance imaging sequences. • To identify the characteristic imaging findings according to tumour location. • To discuss the relevant differential diagnoses of pilocytic astrocytoma in each tumour location.
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Affiliation(s)
- Danai Chourmouzi
- Department of Radiology, Interbalcan Medical Centre, Thessaloniki, Greece,
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Significance of radical resection for pilomyxoid astrocytoma of the cerebellum: a case report and review of the literature. Childs Nerv Syst 2013; 29:1375-9. [PMID: 23503634 DOI: 10.1007/s00381-013-2082-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 03/06/2013] [Indexed: 10/27/2022]
Abstract
BACKGROUND Pilomyxoid astrocytoma (PMA) was recently classified as a variant of pilocytic astrocytoma (PA) with significantly more aggressive clinical features than those of PA. Like PAs, PMAs frequently arise in the chiasmatic/hypothalamic regions. The cerebellum is also a common site of occurrence for PAs but not for PMAs. CASE DESCRIPTION We present the case of a 31-month-old boy with cerebellar PMA that showed rapid regrowth during the 3 months following the first subtotal resection. Gross total resection was achieved in the second surgery, followed by radiation to the tumor bed. RESULTS During follow-up over the next 12 years, there has been no evidence of recurrence on magnetic resonance imaging. CONCLUSIONS Although the prognosis of cerebellar PMAs remains unknown because of the paucity of cases, the relevant literature reports a more favorable outcome for cerebellar PMAs than for PMAs occurring at other locations. The results of this case study and a review of the relevant literature advocate radical resection, sometimes involving multiple surgeries, for cerebellar PMAs because gross total or near total resection is more feasible in the cerebellum than in other locations.
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Chonan M, Kanamori M, Kumabe T, Saito R, Watanabe M, Tominaga T. Pilomyxoid astrocytoma of the cerebellum with Williams syndrome: a case report. Childs Nerv Syst 2013; 29:1211-4. [PMID: 23604363 DOI: 10.1007/s00381-013-2107-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 04/05/2013] [Indexed: 12/11/2022]
Abstract
CASE REPORT A 3-year-old boy with Williams syndrome associated with supravalvular aortic stenosis was admitted to our hospital with disturbance of consciousness and a 2-month history of truncal ataxia. T1-weighted magnetic resonance imaging with contrast medium showed a heterogeneously enhanced tumor in the right cerebellum with severe hydrocephalus. The patient underwent tumor resection via suboccipital craniotomy. At the end of resection of the tumor, sudden cardiac arrest occurred after ST segment elevation. Despite immediate cardiopulmonary resuscitation, the patient died. Histological examination of the cerebellar tumor revealed that the tumor consisted of monomorphous bipolar spindle cells on a background of myxoid matrix, and angiocentric arrangement without Rosenthal fibers or eosinophilic granular body. The final diagnosis was pilomyxoid astrocytoma. CONCLUSION This case of Williams syndrome with cerebellar pilomyxoid astrocytoma suggests the importance of investigation of the development of brain tumors and occurrence of intraoperative cardiac arrest associated with Williams syndrome.
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Affiliation(s)
- Masashi Chonan
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan
| | - Masayuki Kanamori
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan
| | - Toshihiro Kumabe
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
| | - Ryuta Saito
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan
| | - Mika Watanabe
- Department of Pathology, Tohoku University Hospital, Sendai, Japan
| | - Teiji Tominaga
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan
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Bhargava D, Sinha P, Chumas P, Al-Tamimi Y, Shivane A, Chakrabarty A, Surash S, Novegno F, Crimmins D, Tyagi AK. Occurrence and distribution of pilomyxoid astrocytoma. Br J Neurosurg 2013; 27:413-8. [DOI: 10.3109/02688697.2012.752430] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Abstract
OBJECTIVE To quantify and compare T2 signal and apparent diffusion coefficient (ADC) in pilocytic and pilomyxoid astrocytoma (PA and PMA) and correlate results with myxoid content. METHODS Echo-planar diffusion weighted images (DWI) and standard magnetic resonance imaging (MRI) findings were reviewed retrospectively in patients with PA (n=34) and PMA (n=8). Regions of interest (ROIs) were drawn on ADC maps within tumor parts with lowest ADC values. Apparent diffusion coefficient values in tumor were normalized to those in cerebrospinal fluid (ADC/CSF). The ratio of T2 signal intensity in solid tumor parts to CSF (T2/CSF) was registered. Myxoid matrix was histologically quantified retrospectively in 8 PMAs and 17 PAs and correlated with imaging findings. RESULTS Mean ADC/CSF for PA and PMA was 0.53±0.10 and 0.69±0.10 (p<0.01). Mean T2/CSF for PA and PMA was 0.78±0.19 and 0.93±0.09 (p<0.01). Mean proportion of myxoid tumor matrix in PA was 50% (range, 10-100%) and 93% (range, 90-100%) in PMA (p=0.004). Eight patients (32%; all PA) had less than 50% myxoid content and 17 (68%; 8 PA; 9 PMA) had more. There was positive correlation of ADC/CSF, T2/CSF and ADC (r2=0.61, 0.65 and 0.60 respectively) and significant difference between the groups with more and less than 50% myxoid content (p=0.01 for ADC/CSF and T2/CSF and p=0.02 for ADC). CONCLUSIONS General imaging features of PA and PMA are non-specific, ADC values and T2 signal intensity are generally higher in the latter, reflecting the proportion of myxoid matrix in these tumors.
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Nakamura OK, Pinho MDC, Odone Filho V, Rosemberg S. Intermediate pilomyxoid astrocytoma and diencephalic syndrome: imaging findings. EINSTEIN-SAO PAULO 2012; 10:236-8. [DOI: 10.1590/s1679-45082012000200020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 08/08/2012] [Indexed: 11/22/2022] Open
Abstract
Pilomyxoid astrocytoma, an entity described as a histological variant of pilocytic astrocytoma, is a rare primary tumor of the central nervous system. It is usually located in the hypothalamic-chiasmatic area, affecting children with a mean age of 10 months. It has a high rate of recurrence and cerebrospinal fluid dissemination, which may be present throughout the neuroaxis. Due to its topography, it may present developmental delay in childhood and diencephalic syndrome, characterized by extreme weight loss, lack of fat accumulation, hyperactivity, euphoria and alertness. Magnetic resonance imaging has an important role in its diagnosis, staging and follow-up of pilomyxoid astrocytoma. However, for a definitive diagnosis, anatomopathology is particularly important to differentiate it from pilocytic astrocytoma. Some cases, as in this present one, have simultaneous histological features of pilocytic and pilomyxoid astrocytomas, constituting a group called intermediate pilomyxoid astrocytoma. Surgery is the best treatment option and it usually requires adjuvant therapy.
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Affiliation(s)
- Olavo Kyosen Nakamura
- Department of Diagnostic Imaging, Hospital Israelita Albert Einstein, São Paulo, SP, Brazil
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Lemm D, de Oliveira FH, Bernays RL, Kockro RA, Kollias S, Fischer I, Rushing EJ. Rare suprasellar glioblastoma: report of two cases and review of the literature. Brain Tumor Pathol 2012; 29:216-20. [PMID: 22350669 DOI: 10.1007/s10014-012-0086-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 01/31/2012] [Indexed: 11/27/2022]
Abstract
BACKGROUND AND IMPORTANCE The suprasellar and hypothalamic/chiasmatic regions can harbor a broad range of pathologic conditions, both neoplastic and nonneoplastic; however, malignant gliomas are extremely rare in those regions. CLINICAL PRESENTATIONS Patient 1 was a 70 year-old man with weight loss and rapidly progressive visual impairment. A mass centered in the hypothalamus was detected on magnetic resonance (MR) imaging. The second patient, a 45 year-old woman, complained of visual symptoms and headaches. MR imaging revealed a combined intra- and suprasellar mass. In both instances, the preoperative differential diagnosis favored craniopharyngioma. Histological examination confirmed the diagnosis of glioblastoma. CONCLUSION We report two rare adult cases of hypothalamic/chiasmatic glioblastoma. The authors review the literature, highlighting the importance of considering this rare entity in the differential diagnosis of suprasellar and hypothalamic lesions.
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Affiliation(s)
- Doreen Lemm
- Institute of Neuropathology, University Hospital Zurich, Schmelzbergstrasse 12, 8091 Zurich, Switzerland.
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40
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Edwards JR, Kulwin CG, Martin SE, Wilson S, Ho CY, Fulkerson DH. Temporal and optic pathway pilomyxoid astrocytoma mimicking dural-based lesion: case report and review of the literature. Pediatr Neurosurg 2012; 48:253-7. [PMID: 23548417 DOI: 10.1159/000345634] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Accepted: 11/01/2012] [Indexed: 11/19/2022]
Abstract
Pilomyxoid astrocytomas (PMAs) are low-grade tumors that share many common traits with pilocytic astrocytomas. However, PMAs have a more worrisome clinical course, with a higher recurrence rate, lower survival rate, and higher risk of leptomeningeal spread compared to pilocytic tumors. These tumors tend to occur in younger children and are typically located in the area of the optic chiasm or hypothalamus. There are few studies examining the radiographic appearance of these lesions. In this case report, the authors present an unusual radiographic appearance of a PMA in an 11-year-old child. Preoperative images suggested a dural-based, homogenously enhancing lesion coupled with an enlarged optic nerve. Surgery revealed an intraparenchymal lesion of the right temporal lobe. There was hyperintensity on T2 MRI sequences, suggesting infiltration of the tumor along the optic tracts.
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Affiliation(s)
- John R Edwards
- Division of Pediatric Neurosurgery, Department of Neurosurgery, Indiana University School of Medicine, Indianapolis, IN 46202-5200, USA
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41
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Ge PF, Wang HF, Qu LM, Chen B, Fu S, Luo Y. Pilomyxoid astrocytoma in cerebellum. Chin J Cancer Res 2011; 23:242-4. [PMID: 23467810 DOI: 10.1007/s11670-011-0242-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Accepted: 05/12/2011] [Indexed: 11/30/2022] Open
Abstract
Pilomyxoid astrocytoma is a new identified variant type of pilocytic astrocytoma, and typically locates in the hypothalamic and chiasmatic region. Herein, we reported a nine-year-old boy with pilomyxoid astrocytoma in the cerebellum. MRI scanning showed a tumor involved the cerebellar vermis, tonsil, the forth ventricle and brainstem. It was homogeneous isointensity on T1WI, relative hyper-intensity on T2WI, hyper-intensity on fluid attenuated inversion recovery (FLAIR) images, and uniform enhancement on contrast T1WI. The tumor was sub-totally removed and was proved histologically to be pilomyxoid astrocytoma. Follow-up at the 5th month, MRI showed the residual tumor enlarged at the brainstem. The patient survived 10 months after the operation, and finally died of respiration failure resulting from brainstem dysfunction.
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Affiliation(s)
- Peng-Fei Ge
- Department of Neurosurgery, the First Affiliated Bethune Hospital, Jilin University, Changchun 130021, China
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42
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Osborn AG, Salzman KL, Thurnher MM, Rees JH, Castillo M. The new World Health Organization Classification of Central Nervous System Tumors: what can the neuroradiologist really say? AJNR Am J Neuroradiol 2011; 33:795-802. [PMID: 21835942 DOI: 10.3174/ajnr.a2583] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The WHO Classification of Tumors of the Central Nervous System has become the worldwide standard for classifying and grading brain neoplasms. The most recent edition (WHO 2007) introduced a number of significant changes that include both additions and redefinitions or clarifications of existing entities. Eight new neoplasms and 4 new variants were introduced. This article reviews these entities, summarizing both their histology and imaging appearance. Now with more than 3 years of clinical experience following publication of the newest revision, we also ask, "What can the neuroradiologist really say?" Are there imaging findings that could suggest the preoperative diagnosis of a new tumor entity or variant?
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Affiliation(s)
- A G Osborn
- University of Utah School of Medicine, Salt Lake City, UT 84132, USA.
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Forbes JA, Mobley BC, O’Lynnger TM, Cooper CM, Ghiassi M, Hanif R, Pearson MM. Pediatric cerebellar pilomyxoid-spectrum astrocytomas. J Neurosurg Pediatr 2011; 8:90-6. [PMID: 21721894 PMCID: PMC3779306 DOI: 10.3171/2011.4.peds1115] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
OBJECT Pediatric cerebellar astrocytomas with pilomyxoid features include classic pilomyxoid astrocytomas (PMAs) and intermediate pilomyxoid tumors (IPTs). Since the original description of PMA in 1999, most reports in the literature have described PMAs arising from the hypothalamic/chiasmatic region. To the authors' knowledge, PMAs arising from the posterior fossa have not been discussed in the neurosurgical literature. Intermediate pilomyxoid tumors, or tumors with pathological features of both pilocytic astrocytoma (PA) and PMA, have only recently been described. In this article, the authors present 2 cases that fall within the spectrum of pediatric cerebellar PMA-including a classic PMA and an intermediate pilomyxoid tumor. The authors compare the radiological presentation, surgical results, and postoperative course to findings in a cohort of 15 patients with cerebellar PAs. METHODS Between 2003 and 2010, 2 patients with pilomyxoid-spectrum astrocytomas underwent treatment at Vanderbilt Children's Hospital. One was a 22-month-old girl who presented with progressive gait disturbance and falls. The other was a 4-year-old girl who presented with ataxia and generalized weakness. In a retrospective review of pediatric cerebellar neoplasms resected by the senior author during this period, these tumors comprised 4% of cerebellar neoplasms and approximately 10% of cerebellar glial neoplasms. RESULTS Both patients were treated with midline suboccipital craniotomy for resection. In both cases, tumor invasion anteriorly into the brainstem prevented gross-total resection. the patient in Case 1 was placed on chemotherapy following pathological diagnosis and later developed definitive evidence of leptomeningeal dissemination (LD) 3 years after the operation. The patient in Case 2 was placed on chemotherapy after exhibiting progressive evidence of local recurrence (findings were negative for LD) 12 months following resection. CONCLUSIONS Pediatric patients with cerebellar pilomyxoid-spectrum astrocytomas appear to suffer higher rates of local recurrence and LD than pediatric patients with cerebellar PAs.
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Affiliation(s)
- Jonathan A. Forbes
- Department of Neurosurgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Bret C. Mobley
- Department of Pathology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Thomas M. O’Lynnger
- Department of Neurosurgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Calvin M. Cooper
- Vanderbilt School of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Mahan Ghiassi
- Department of Neurosurgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Rimal Hanif
- Vanderbilt School of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Matthew M. Pearson
- Department of Neurosurgery, Vanderbilt University Medical Center, Nashville, Tennessee
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Johnson KA, Ackerman LL, Douglas-Akinwande AC, Hattab EM. A foramen of Monro tumor. Neuropathology 2011; 31:658-61. [PMID: 21615520 DOI: 10.1111/j.1440-1789.2011.01229.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Karen A Johnson
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA
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Abstract
Pilomyxoid astrocytomas (PMAs) are low-grade (WHO Grade II) tumors for which the imaging features are similar to pilocytic astrocytomas (PAs), but for which histological features and the clinical course differ. They are classified as a variant of PA. They have only been recently recognized, and they behave more aggressively than PAs. Most cases occur in the hypothalamic-chiasmatic area, although they may be located in any part of the neuraxis. Posterior fossa PMAs are very rare. The authors report a case of a 2-year-old girl with cerebellar PMA.
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Schroeder JW, Vezina LG. Pediatric sellar and suprasellar lesions. Pediatr Radiol 2011; 41:287-98; quiz 404-5. [PMID: 21267556 DOI: 10.1007/s00247-010-1968-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 12/06/2010] [Accepted: 12/15/2010] [Indexed: 11/28/2022]
Abstract
Masses arising in the sella turcica and the suprasellar region are common in children. The type and frequency of the various lesions encountered in childhood differ from the adult presentation. This article reviews the embryology of the pituitary gland and its normal appearance in childhood as well as the imaging and clinical findings of the common and some of the uncommon lesions arising in the sella turcica, the pituitary stalk, the suprasellar cistern and the lower third ventricle in the pediatric population.
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Affiliation(s)
- Jason W Schroeder
- Department of Diagnostic Imaging and Radiology, Children's National Medical Center, 111 Michigan Ave. NW, Washington, DC 20010, USA
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Kim SH, Kang SS, Jung TY, Jung S. Juvenile pilomyxoid astrocytoma in the opticohypothalamus. J Korean Neurosurg Soc 2011; 48:445-7. [PMID: 21286484 DOI: 10.3340/jkns.2010.48.5.445] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 01/20/2010] [Accepted: 11/22/2010] [Indexed: 11/27/2022] Open
Abstract
Pilomyxoid astrocytoma (PMA) is a newly recognized variant of a pilocytic astrocytoma. This report describes a case of a pilomyxoid astrocytoma that occurred in the opticohypothalamus. The patient was a 18-year-old girl who complained decreased visual acuity and visual field over a period of two years. Magnetic resonance imaging (MRI) showed an irregular lobulated tumor with heterogeneous enhancement at the suprasellar region involving the hypothalamus. The mass was partially removed via the subfrontal approach. Its pathology was confirmed to be PMA. Adjuvant chemotherapy with cisplatin and vincristine was started following tumor resection. After four cycles, the mass showed a partial response to the chemotherapy. Although long-term outcome is yet to be determined, the administration of combined cisplatin and vincristine treatment seems to be an effective regimen for a pilomyxoid astrocytoma.
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Affiliation(s)
- Sung-Hyun Kim
- Department of Neurosurgery, Chonnam National University Hwasun Hospital and Medical School, Hwasun, Korea
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Pilomyxoid astrocytoma of the cervical spinal cord in a child with rapid progression into glioblastoma: case report and literature review. Childs Nerv Syst 2011; 27:313-21. [PMID: 20461521 DOI: 10.1007/s00381-010-1171-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2010] [Accepted: 04/29/2010] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Pilomyxoid astrocytoma (PMA) is a recently described glial tumor with similarities to pilocytic astrocytomas, yet with distinct histopathological characteristics and a more aggressive behavior. It occurs predominantly in the hypothalamic/chiasmatic region. Only four patients with spinal cord PMA have been reported in the pediatric population. The 2007 WHO Working Group recognized PMA as a new variant and recommended an assignment to WHO grade II. OBJECTIVE The purpose of this paper was to report a rare location, address the aggressive behavior and rapid progression, and based on the specific patient, to review the literature and discuss current treatment strategies. CASE PRESENTATION A 12-year-old girl presented with motor and sensory deficits of the left side as well as gait disturbance. Imaging revealed an intramedullary tumor extending from C2 to C7. The patient improved impressively after surgical resection. Histopathological findings were consistent with PMA. Three months later, the patient presented with rapid neurological deterioration. Histopathology after the second operation was consistent with glioblastoma. The outcome was fatal 12 months after initial diagnosis, despite adjuvant therapy. CONCLUSIONS This is the fifth pediatric spinal cord PMA in literature. Furthermore, it is the only documented patient with rapid recurrence and progression within 3 months into a glioblastoma. The question of a sampling error affecting initial pathology is raised. Based on contemporary literature data, we discuss the further treatment options, as there are no guidelines yet. Efforts towards registries should be encouraged, as the documentation of PMA might lead to more evidence based treatment strategies.
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Forbes JA, Chambless LB, Smith JG, Wushensky CA, Lebow RL, Alvarez J, Pearson MM. Use of T2 signal intensity of cerebellar neoplasms in pediatric patients to guide preoperative staging of the neuraxis. J Neurosurg Pediatr 2011; 7:165-74. [PMID: 21284463 PMCID: PMC3777739 DOI: 10.3171/2010.11.peds10312] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT The question of whether to obtain routine or selective preoperative imaging of the neuraxis in pediatric patients with cerebellar neoplasms remains a controversial topic. Staging of the neuraxis is generally considered beneficial in patients with neoplasms associated with an elevated risk of leptomeningeal dissemination (LD). When these studies are obtained preoperatively, there is a decrease in the number of false-positive images related to debris in the immediate postoperative period. Additionally, knowledge of the extent of spread has the potential to affect the risk/benefit analysis of aggressive resection. Although the majority of pediatric neurosurgeons surveyed choose to obtain selective preoperative imaging of the neuraxis in cases of cerebellar neoplasms "with findings suggestive of high-grade pathology," an evidence-based protocol in the literature is lacking. The goal of this study was to assess radiological characteristics of tumors with an elevated risk of LD and identify a method to help guide preoperative imaging of the neuraxis. METHODS The authors first reviewed the literature to gain an appreciation of the risk of LD of pediatric cerebellar neoplasms based on underlying histopathology and/or grade. Available evidence indicates preoperative imaging of the neuraxis in patients with Grade I tumors to be of questionable utility. In contrast, evidence suggested that preoperative imaging of the neuraxis in patients with Grades II-IV neoplasms was clinically warranted. The authors then evaluated an extensive base of neuroradiological literature to identify possible MR imaging and/or CT findings with the potential to differentiate Grade I from higher-grade neoplasms in pediatric patients. They analyzed the preoperative radiological findings in 50 pediatric patients who had undergone craniotomy for resection of cerebellar neoplasms at Vanderbilt Children's Hospital since 2003 with reference to 7 chosen radiological criteria. Logistic regression models were fit using radiological features to determine the best predictors of Grades II-IV tumors. Receiver operating characteristic methods were used to identify diagnostic properties of the best predictors. RESULTS The relative T2 signal intensity (RT2SI), an indirect measure of the water content of the solid component of the tumor, was best able to identify neoplasms with an elevated risk of LD. An RT2SI value of 0.71 was selected by the authors as the best operating point on the curve. Of the 31 neoplasms retrospectively designated as hypointense T2-weighted lesions (RT2SI ≤ 0.71), 30 (97%) were Grade II or higher. All medulloblastomas, ependymomas, and high-grade (Grades III and IV) neoplasms were hypointense T2-weighted lesions. Of the 19 T2-weighted hyperintense neoplasms (RT2SI > 0.71), 16 (84%) were Grade I and 3 were Grade II. CONCLUSIONS Measurement of the RT2SI can help predict Grade II-IV tumors at an elevated risk of leptomeningeal spread and guide staging of the neuraxis. Pediatric patients with cerebellar neoplasms found to have an RT2SI of less than or equal to 0.71 are recommended for neuraxis imaging prior to surgery.
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Affiliation(s)
- Jonathan A Forbes
- Department of Neurosurgery, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.
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Lee IH, Kim JH, Suh YL, Eo H, Shin HJ, Yoo SY, Lee KS. Imaging characteristics of pilomyxoid astrocytomas in comparison with pilocytic astrocytomas. Eur J Radiol 2010; 79:311-6. [PMID: 20619565 DOI: 10.1016/j.ejrad.2010.06.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 06/03/2010] [Accepted: 06/09/2010] [Indexed: 11/25/2022]
Abstract
PURPOSE Pilomyxoid astrocytoma (PMA) is a recently described astrocytic tumor that has been previously diagnosed as pilocytic astrocytoma (PA). The purpose of this study was to describe the imaging features of PMAs in comparison with PAs. MATERIALS AND METHODS We retrospectively reviewed CT/MR images and medical records of 10 patients with PMA and 38 patients with PA. The mean ages of patients with PMA and PA were 10 and 15 years, respectively. Imaging features including location, composition, enhancement pattern, presence of calcification, hemorrhage, and leptomeningeal dissemination were compared in patients with two tumor types. RESULTS Six PMAs (60%) occurred at the suprasellar area and the cerebellum was the most common (45%) site of PA. Solid component was dominant in eight PMAs (80%) and in 19 PAs (50%). All of the PMAs containing solid mass (n=8) included non-enhancing portion while 12/37 (32%) PAs included non-enhancing solid portion (p<0.05). Leptomeningeal dissemination was noted in five PMAs (50%) and one PA (3%) (p<0.05). Other imaging findings were not significantly different. CONCLUSION A younger age, more frequent occurrence at the suprasellar area, mainly solid mass containing non-enhancing portion, and more frequent leptomeningeal dissemination are helpful differential features of PMAs as compared to PAs.
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Affiliation(s)
- In Ho Lee
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Gangnam-Gu, Seoul 135-710, Republic of Korea.
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