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Luo X, Zhang Z, Cheng C, Wang T, Fang D, Zuo C, Yuan G, Li R, Li X. SPECT Imaging with Tc-99m-Labeled HYNIC-FAPI-04 to Extend the Differential Time Window in Evaluating Tumor Fibrosis. Pharmaceuticals (Basel) 2023; 16:ph16030423. [PMID: 36986521 PMCID: PMC10051245 DOI: 10.3390/ph16030423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/02/2023] [Accepted: 03/06/2023] [Indexed: 03/16/2023] Open
Abstract
The so-far used Ga-68- or F-18-labelled tracers are of a relative short time window in differentiating tumor fibrosis. SPECT applicable imaging probe, 99mTc-HYNIC-FAPI-04, was synthesized and evaluated in tumor cells and animal models of FAP-positive glioma and FAP-negative hepatoma, and then compared with 18F-FDG or 68Ga-FAPI-04 PET/CT. The radio-labeling rate of 99mTc-HYNIC-FAPI-04 was greater than 90%, and the radiochemical purity was >99% after purification with sep-pak C18 column. In vitro cell uptake experiments of 99mTc-HYNIC-FAPI-04 showed good FAP binding specificity, and the cellular uptake significantly decreased when blocked by DOTA-FAPI-04, reflecting the similar targeting mechanism of HYNIC-FAPI-04 and DOTA-FAPI-04. SPECT/CT imaging showed that U87MG tumor was distinguishable and of a high uptake of 99mTc-HYNIC-FAPI-04 (2.67 ± 0.35 %ID/mL at 1.5 h post injection (h P.I.), while tumor signal of FAP-negative HUH-7 was as low as 0.34 ± 0.06 %ID/mL. At 5 h P.I., U87MG tumor was still distinguishable (1.81 ± 0.20 %ID/mL). In comparison, although U87MG tumor was of obvious 68Ga-FAPI-04 uptake and clearly visible at 1 h P.I., the tumorous radioactive signals were fuzzy at 1.5 h P.I. 99mTc-HYNIC-FAPI-04 specifically bound to FAP-positive tumors and qualified with the ability of evaluating tumor fibrosis over longer time windows.
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Affiliation(s)
- Xiu Luo
- Department of Nuclear Medicine, Shanghai Changhai Hospital, Shanghai 200433, China (X.L.)
| | - Zhe Zhang
- Department of Nuclear Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Chao Cheng
- Department of Nuclear Medicine, Shanghai Changhai Hospital, Shanghai 200433, China (X.L.)
| | - Tao Wang
- Department of Nuclear Medicine, Shanghai Changhai Hospital, Shanghai 200433, China (X.L.)
| | - Danzhou Fang
- Department of Nuclear Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Changjing Zuo
- Department of Nuclear Medicine, Shanghai Changhai Hospital, Shanghai 200433, China (X.L.)
| | - Gengbiao Yuan
- Department of Nuclear Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
- Correspondence: (G.Y.); (R.L.)
| | - Rou Li
- Department of Nuclear Medicine, Shanghai Changhai Hospital, Shanghai 200433, China (X.L.)
- Correspondence: (G.Y.); (R.L.)
| | - Xiao Li
- Department of Nuclear Medicine, Shanghai Changhai Hospital, Shanghai 200433, China (X.L.)
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Multi-modal 3D imaging of radionuclides using multiple hybrid Compton cameras. Sci Rep 2022; 12:2546. [PMID: 35169183 PMCID: PMC8847431 DOI: 10.1038/s41598-022-06401-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 01/28/2022] [Indexed: 12/25/2022] Open
Abstract
For radiological diagnosis and radionuclide therapy, X-ray and gamma-ray imaging technologies are essential. Single-photon emission tomography (SPECT) and positron emission tomography (PET) play essential roles in radiological diagnosis, such as the early detection of tumors. Radionuclide therapy is also rapidly developing with the use of these modalities. Nevertheless, a limited number of radioactive tracers are imaged owing to the limitations of the imaging devices. In a previous study, we developed a hybrid Compton camera that conducts simultaneous Compton and pinhole imaging within a single system. In this study, we developed a system that simultaneously realizes three modalities: Compton, pinhole, and PET imaging in 3D space using multiple hybrid Compton cameras. We achieved the simultaneous imaging of Cs-137 (Compton mode targeting 662 keV), Na-22 (PET mode targeting 511 keV), and Am-241 (pinhole mode targeting 60 keV) within the same field of view. In addition, the imaging of Ga-67 and In-111, which are used in various diagnostic scenarios, was conducted. We also verified that the 3D distribution of the At-211 tracer inside a mouse could be imaged using the pinhole mode.
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Qu H, Shi R, Li S, Che F, Wu J, Li H, Chen W, Zhang H, Li Z, Cui X. Dynamic radiomics: A new methodology to extract quantitative time-related features from tomographic images. APPL INTELL 2022. [DOI: 10.1007/s10489-021-03053-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Uenomachi M, Shimazoe K, Ogane K, Takahashi H. Simultaneous multi-nuclide imaging via double-photon coincidence method with parallel hole collimators. Sci Rep 2021; 11:13330. [PMID: 34172772 PMCID: PMC8233320 DOI: 10.1038/s41598-021-92583-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 06/11/2021] [Indexed: 02/07/2023] Open
Abstract
Multi-tracer imaging can provide useful information in the definitive diagnosis and research of medical, biological, and pharmaceutical sciences. Single-photon emission computed tomography (SPECT) is one of the nuclear medicine imaging modalities widely used for diagnosis or medical research and has a multi-tracer imaging capability. One of the drawbacks of multi-tracer imaging is crosstalk from other gamma rays, which affects the reconstructed image. Scattering correction methods, such as the dual- and triple-energy window methods, are used for conventional SPECT imaging to reduce the background caused by the crosstalk. This study proposes another crosstalk reduction method. Some nuclides emit two or more gamma rays through intermediate levels. Thus, detecting these gamma rays with the coincidence method allows us to distinguish a true gamma ray signal and a background signal. The nuclide position can be estimated at the intersection of two gamma rays using collimators. We demonstrate herein simultaneous 111In and 177Lu imaging via the double-photon coincidence method using GAGG detectors and parallel hole collimators. The double-photon coincidence method greatly reduces the background caused by other gamma rays and offers higher-quality images than does conventional imaging.
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Affiliation(s)
- Mizuki Uenomachi
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan.
| | - Kenji Shimazoe
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan.,JST, PRESTO, Saitama, 332-0012, Japan
| | - Kenichiro Ogane
- Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan.,Department of Nuclear Medicine, International University of Health and Welfare, 1-4-3, Minato-ku, Tokyo, Japan
| | - Hiroyuki Takahashi
- Institute of Engineering Innovation, School of Engineering, The University of Tokyo, 2-11-16, Yayoi, Bunkyo-ku, Tokyo, Japan
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Gulia A, Kurisunkal V, Puri A, Purandare N, Gupta S, Rangarajan Drm V. Is Skeletal Imaging Essential in the Staging Workup for Conventional Chondrosarcoma? Clin Orthop Relat Res 2020; 478:2480-2484. [PMID: 32567825 PMCID: PMC7594919 DOI: 10.1097/corr.0000000000001357] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 05/21/2020] [Indexed: 01/31/2023]
Abstract
BACKGROUND Staging of a bone sarcoma before initiating treatment helps orthopaedic oncologists determine the intent of treatment and predicting the prognosis. As per National Comprehensive Cancer Network (NCCN) and European Society for Medical Oncology (ESMO) guidelines, there are no exclusive recommendations for chondrosarcoma staging. They are staged similar to other bone sarcomas even though skeletal metastases are extremely rare in chondrosarcomas. QUESTIONS/PURPOSES We asked: (1) What proportion of patients with a chondrosarcoma present with detectable only skeletal metastasis? (2) What proportion of patients with chondrosarcoma present with skeletal metastasis with or without concurrent pulmonary metastases? METHODS Between January 2006 to December 2017, 480 patients with histology-proven chondrosarcomas of the extremity, including clavicle, scapula, spine, and pelvis, presented to our institute. Fifty-three patients were excluded due to incomplete details about their staging. The remaining 427 were retrospectively analyzed and included in this study. Their clinical, radiological, and histopathological details were retrieved from patient files and electronic medical records. Of the 427 patients included, 53 had Grade 1 chondrosarcoma, 330 had Grade 2 chondrosarcoma, and 41 had Grade 3 chondrosarcoma. Grade was not available in three patients. All patients were staged with a thoracic CT scan and bone scan or a whole body fluorodeoxyglucose positron-emission tomography/CT (FDG PET/CT). Patients with a suspected or documented metastasis were reviewed again by an experienced radiologist and a nuclear medicine expert for the purpose of this study. A total of 8% (35 of 427) of patients with chondrosarcoma had isolated lung metastases at the time of initial staging. These included 9% (31 of 330) of patients with Grade 2 chondrosarcomas and 10% (4 of 41) of patients with Grade 3 chondrosarcomas. No patient with a Grade 1 chondrosarcoma had detectable lung metastases. The primary study endpoint was the number of patients who had a diagnosis of skeletal or skeletal and lung metastases as identified by the staging modalities. RESULTS Three patients with Grade 2 chondrosarcoma had only skeletal metastasis. No patients with Grade 1 or Grade 3 chondrosarcoma had detectable bone metastases. Combined lung and bone metastases were seen in only two patients with Grade 2 chondrosarcoma. CONCLUSIONS Our study found that the incidence of bony metastasis in conventional chondrosarcomas is extremely low. Considering the present results, we believe skeletal scanning may be overused in current staging algorithms. We do not have survival outcomes to know if detecting these few patients with skeletal lesions at initial presentation would be important in the absence of symptoms, but our data suggest that omitting skeletal imaging from the staging work-up of conventional chondrosarcomas should be considered. It may be reserved for patients with documented pulmonary metastases. LEVEL OF EVIDENCE Level IV, diagnostic study.
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Affiliation(s)
- Ashish Gulia
- A. Gulia, V. Kurisunkal, A. Puri, N. Purandare, S. Gupta, V. Rangarajan, Department of Surgical Oncology, Tata Memorial Hospital, HBNI, Mumbai, India
| | - Vineet Kurisunkal
- A. Gulia, V. Kurisunkal, A. Puri, N. Purandare, S. Gupta, V. Rangarajan, Department of Surgical Oncology, Tata Memorial Hospital, HBNI, Mumbai, India
| | - Ajay Puri
- A. Gulia, V. Kurisunkal, A. Puri, N. Purandare, S. Gupta, V. Rangarajan, Department of Surgical Oncology, Tata Memorial Hospital, HBNI, Mumbai, India
| | - Nilendu Purandare
- A. Gulia, V. Kurisunkal, A. Puri, N. Purandare, S. Gupta, V. Rangarajan, Department of Surgical Oncology, Tata Memorial Hospital, HBNI, Mumbai, India
| | - Srinath Gupta
- A. Gulia, V. Kurisunkal, A. Puri, N. Purandare, S. Gupta, V. Rangarajan, Department of Surgical Oncology, Tata Memorial Hospital, HBNI, Mumbai, India
| | - Venkatesh Rangarajan Drm
- A. Gulia, V. Kurisunkal, A. Puri, N. Purandare, S. Gupta, V. Rangarajan, Department of Surgical Oncology, Tata Memorial Hospital, HBNI, Mumbai, India
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Itkonen HM, Urbanucci A, Martin SES, Khan A, Mathelier A, Thiede B, Walker S, Mills IG. High OGT activity is essential for MYC-driven proliferation of prostate cancer cells. Am J Cancer Res 2019; 9:2183-2197. [PMID: 31149037 PMCID: PMC6531294 DOI: 10.7150/thno.30834] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 02/18/2019] [Indexed: 01/01/2023] Open
Abstract
O-GlcNAc transferase (OGT) is overexpressed in aggressive prostate cancer. OGT modifies intra-cellular proteins via single sugar conjugation (O-GlcNAcylation) to alter their activity. We recently discovered the first fast-acting OGT inhibitor OSMI-2. Here, we probe the stability and function of the chromatin O-GlcNAc and identify transcription factors that coordinate with OGT to promote proliferation of prostate cancer cells. Methods: Chromatin immunoprecipitation (ChIP) coupled to sequencing (seq), formaldehyde-assisted isolation of regulatory elements, RNA-seq and reverse-phase protein arrays (RPPA) were used to study the importance of OGT for chromatin structure and transcription. Mass spectrometry, western blot, RT-qPCR, cell cycle analysis and viability assays were used to establish the role of OGT for MYC-related processes. Prostate cancer patient data profiled for both mRNA and protein levels were used to validate findings. Results: We show for the first time that OGT inhibition leads to a rapid loss of O-GlcNAc chromatin mark. O-GlcNAc ChIP-seq regions overlap with super-enhancers (SE) and MYC binding sites. OGT inhibition leads to down-regulation of SE-dependent genes. We establish the first O-GlcNAc chromatin consensus motif, which we use as a bait for mass spectrometry. By combining the proteomic data from oligonucleotide enrichment with O-GlcNAc and MYC ChIP-mass spectrometry, we identify host cell factor 1 (HCF-1) as an interaction partner of MYC. Inhibition of OGT disrupts this interaction and compromises MYC's ability to confer androgen-independent proliferation to prostate cancer cells. We show that OGT is required for MYC-mediated stabilization of mitotic proteins, including Cyclin B1, and/or the increased translation of their coding transcripts. This implies that increased expression of mRNA is not always required to achieve increased protein expression and confer aggressive phenotype. Indeed, high expression of Cyclin B1 protein has strong predictive value in prostate cancer patients (p=0.000014) while mRNA does not. Conclusions: OGT promotes SE-dependent gene expression. OGT activity is required for the interaction between MYC and HCF-1 and expression of MYC-regulated mitotic proteins. These features render OGT essential for the androgen-independent, MYC-driven proliferation of prostate cancer cells. Androgen-independency is the major mechanism of prostate cancer progression, and our study identifies OGT as an essential mediator in this process.
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Bhatt AD, Schuler JC, Boakye M, Woo SY. Current and emerging concepts in non-invasive and minimally invasive management of spine metastasis. Cancer Treat Rev 2013; 39:142-52. [DOI: 10.1016/j.ctrv.2012.08.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 08/08/2012] [Accepted: 08/09/2012] [Indexed: 01/31/2023]
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Choi Y, Lee I, Kim SJ, Kim J, Choi KU, Lee J, Song J, Moon T. Analyses of short-term follow-up MRI and PET-CT for evaluation of residual tumour after inadequate primary resection of malignant soft-tissue tumours. Clin Radiol 2013; 68:117-24. [DOI: 10.1016/j.crad.2012.05.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 05/01/2012] [Accepted: 05/17/2012] [Indexed: 11/28/2022]
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9
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Douis H, James SL, Grimer RJ, Davies MA. Is bone scintigraphy necessary in the initial surgical staging of chondrosarcoma of bone? Skeletal Radiol 2012; 41:429-36. [PMID: 21892729 DOI: 10.1007/s00256-011-1252-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 08/01/2011] [Accepted: 08/05/2011] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To assess the value of whole-body bone scintigraphy in the initial surgical staging of chondrosarcoma of bone. METHODS A retrospective review was conducted of the bone scintigraphy reports of a large series of patients with peripheral or central chondrosarcoma of bone treated in a specialist orthopaedic oncology unit over a 13-year period. Abnormal findings were correlated against other imaging, histological grade and the impact on surgical staging. RESULTS A total of 195 chondrosarcomas were identified in 188 patients. In 120 (63.8%) patients the reports of bone scintigraphy noted increased activity at the site of one or more chondrosarcomas. In one patient the tumour was outside the field-of-view of the scan, and in the remaining 67 (35.6%) cases, there was increased activity at the site of the chondrosarcoma and further abnormal activity in other areas of the skeleton. Causes of these additional areas of activity included degenerative joint disease, Paget's disease and in one case a previously undiagnosed melanoma metastasis. No cases of skeletal metastases from the chondrosarcoma were found in this series. Multifocal chondrosarcomas were identified in three cases. In two it was considered that all the tumours would have been adequately revealed on the initial MR imaging staging studies. In only the third multifocal case was an unsuspected, further presumed low-grade, central chondrosarcoma identified in the opposite asymptomatic femur. Although this case revealed an unexpected finding the impact on surgical staging was limited as it was decided to employ a watch-and-wait policy for this tumour. CONCLUSION There is little role for the routine use of whole-body bone scintigraphy in the initial surgical staging in patients with chondrosarcoma of bone irrespective of the histological grade.
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Affiliation(s)
- Hassan Douis
- Department of Radiology, Royal Orthopaedic Hospital, Birmingham, B31 2AP, UK
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Bachner M, Loriot Y, Gross-Goupil M, Zucali PA, Horwich A, Germa-Lluch JR, Kollmannsberger C, Stoiber F, Fléchon A, Oechsle K, Gillessen S, Oldenburg J, Cohn-Cedermark G, Daugaard G, Morelli F, Sella A, Harland S, Kerst M, Gampe J, Dittrich C, Fizazi K, De Santis M. 2-¹⁸fluoro-deoxy-D-glucose positron emission tomography (FDG-PET) for postchemotherapy seminoma residual lesions: a retrospective validation of the SEMPET trial. Ann Oncol 2012; 23:59-64. [PMID: 21460378 DOI: 10.1093/annonc/mdr052] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND 2-¹⁸fluoro-deoxy-D-glucose positron emission tomography (FDG-PET) has been recommended in international guidelines in the evaluation of postchemotherapy seminoma residuals. Our trial was designed to validate these recommendations in a larger group of patients. PATIENTS AND METHODS FDG-PET studies in patients with metastatic seminoma and residual masses after platinum-containing chemotherapy were correlated with either the histology of the resected lesion(s) or the clinical outcome. RESULTS One hundred and seventy seven FDG-PET results were contributed. Of 127 eligible PET studies, 69% were true negative, 11% true positive, 6% false negative, and 15% false positive. We compared PET scans carried out before and after a cut-off level of 6 weeks after the end of the last chemotherapy cycle. PET sensitivity, specificity, negative predictive value (NPV), and positive predictive value were 50%, 77%, 91%, and 25%, respectively, before the cut-off and 82%, 90%, 95%, and 69% after the cut-off. PET accuracy significantly improved from 73% before to 88% after the cut-off (P=0.032). CONCLUSION Our study confirms the high specificity, sensitivity, and NPV of FDG-PET for evaluating postchemotherapy seminoma residuals. When carried out at an adequate time point, FDG-PET remains a valuable tool for clinical decision-making in this clinical setting and spares patients unnecessary therapy.
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Affiliation(s)
- M Bachner
- ACR-ITR VIEnna/CEADDP, LBI-ACR VIEnna, and KFJ-Spital, Vienna, Austria
| | - Y Loriot
- Institut Gustave Roussy, Villejuif, France
| | | | - P A Zucali
- Istituto Clinico Humanitas IRCCS, Rozzano (Milan), Italian Germ Cell Cancer Group
| | - A Horwich
- The Royal Marsden Hospital, London and Surrey, UK
| | | | | | - F Stoiber
- Krankenhaus der Barmherzigen Schwestern, Linz, Austria
| | | | - K Oechsle
- Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - S Gillessen
- Kantonsspital St. Gallen, St. Gallen, Switzerland
| | | | - G Cohn-Cedermark
- Department of Oncology-Pathology, Karolinska Institute and University Hospital, Stockholm, Sweden
| | - G Daugaard
- Department of Oncology, 5073 Rigshospitalet, Copenhagen, Denmark
| | - F Morelli
- Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - A Sella
- Assaf Harofeh Medical Center, Zerifin, Israel
| | - S Harland
- University College Hospital London, London, UK
| | - M Kerst
- The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - J Gampe
- Max Planck Institute for Demographic Research, Rostock, Germany
| | - C Dittrich
- ACR-ITR VIEnna/CEADDP, LBI-ACR VIEnna, and KFJ-Spital, Vienna, Austria
| | - K Fizazi
- Institut Gustave Roussy, Villejuif, France
| | - M De Santis
- ACR-ITR VIEnna/CEADDP, LBI-ACR VIEnna, and KFJ-Spital, Vienna, Austria.
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Nakahara T, Togawa T, Nagata M, Kikuchi K, Hatano K, Yui N, Kubo A. Comparison of barium swallow, CT and thallium-201 SPECT in evaluating responses of patients with esophageal squamous cell carcinoma to preoperative chemoradiotherapy. Ann Nucl Med 2008; 17:583-91. [PMID: 14651358 DOI: 10.1007/bf03006672] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The aims of this study were to compare the results of thallium-201 (Tl-201) SPECT, barium swallow and CT in the assessment of the effect of preoperative chemoradiotherapy. This study consisted of 28 patients with advanced esophageal squamous cell carcinoma (AESCC) who underwent the three imaging modalities before and after preoperative chemoradiotherapy. The results were quantified using the bidimensional method for barium swallow and contrast-enhanced CT and the tumor-to-lung ratio for SPECT. The percent decrease in these quantitative values after therapy was defined as %Dba, %Dct and %Dtl respectively. The histological effect of the chemoradiotherapy was determined from the resected surgical specimen of the esophagus: grade 0, 100% viable tumor cells; grade 1a, 99-67%; grade 1b, 66-34%; grade 2, 33-1%; grade 3, no viable cells. A statistically significant difference of %Dtl between the subgroups of each grade was evident (p = 0.0433), whereas no significant differences were evident for %Dba (p = 0.1778) or %Dct (p = 0.7377). However, the overlap of %Dtl between these groups was marked. Although thallium-201 SPECT cannot be used to evaluate the therapeutic effect with acceptable accuracy, SPECT may be of additional value to barium swallow and CT in assessing the response of AESCC to preoperative chemoradiotherapy.
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Affiliation(s)
- Tadaki Nakahara
- Division of Nuclear Medicine, Chiba Cancer Center Hospital, Japan.
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O'Sullivan F. Locally constrained mixture representation of dynamic imaging data from PET and MR studies. Biostatistics 2005; 7:318-38. [PMID: 16361274 DOI: 10.1093/biostatistics/kxj010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Dynamic positron emission tomography (PET) studies provide measurements of the kinetics of radiotracers in living tissue. This is a powerful technology which can play a major role in the study of biological processes, potentially leading to better understanding and treatment of disease. Dynamic PET data relate to complex spatiotemporal processes and its analysis poses significant challenges. In previous work, mixture models that expressed voxel-level PET time course data as a convex linear combination of a finite number of dominant time course characteristics (called sub-TACs) were introduced. This paper extends that mixture model formulation to allow for a weighted combination of scaled sub-TACs and also considers the imposition of local constraints in the number of sub-TACs that can be active at any one voxel. An adaptive 3D scaled segmentation algorithm is developed for model initialization. Increases in the weighted residual sums of squares is used to guide the choice of the number of segments and the number of sub-TACs in the final mixture model. The methodology is applied to five data sets from representative PET imaging studies. The methods are also applicable to other contexts in which dynamic image data are acquired. To illustrate this, data from an echo-planar magnetic resonance (MR) study of cerebral hemodynamics are considered. Our analysis shows little indication of departure from a locally constrained mixture model representation with at most two active components at any voxel. Thus, the primary sources of spatiotemporal variation in representative dynamic PET and MR imaging studies would appear to be accessible to a substantially simplified representation in terms of the generalized locally constrained mixture model introduced.
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Vaylet F, Bonardel G, Salles Y, Bonnichon A, Gontier E, Margery J, Mantzarides M, Guigay J, Foehrenbach H. La tomographie par émission de positons au 18Fluoro-deoxy-glucose (18FDG-TEP) et le bilan initial du cancer bronchique. Rev Mal Respir 2005. [DOI: 10.1016/s0761-8425(05)85771-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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De Santis M, Pont J. The role of positron emission tomography in germ cell cancer. World J Urol 2004; 22:41-6. [PMID: 15024601 DOI: 10.1007/s00345-004-0403-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2004] [Accepted: 02/14/2004] [Indexed: 11/25/2022] Open
Abstract
Positron emission tomography (PET) is a non-invasive tool for imaging regional metabolic processes, which adds another dimension to current anatomy-derived imaging techniques, i.e. metabolic imaging. To date, 2-(18)fluoro-2-deoxy-D-glucose (FDG) has been the only tracer used for imaging germ cell tumors (GCT), which can be distinguished from normal tissue by their different glucose utilization. However, FDG PET has several limitations: (1) inflammatory and granulomatous tissues also show extensive FDG uptake, (2) lesions <1 cm in size can often not be detected, and (3) mature teratoma is indistinguishable from normal and necrotic tissue. Studies assessing the clinical role of FDG PET in GCT suggest that the technique has a place as a standard tool in evaluating post chemotherapy seminoma residuals. Whether it also improves the assessment of the risks carried by clinical stage I non-seminoma patients and the early prediction of response to salvage chemotherapy is still under investigation, or at least needs to be confirmed by further trials. In relapsing patients with a mismatch between tumor markers and imaging data, FDG PET appears to be useful whenever salvage surgery is considered, although systematic trials are not yet available.
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Affiliation(s)
- Maria De Santis
- Department of Medical Oncology, Kaiser Franz Josef Spital der Stadt Wien, Kundratstrasse 3, 1100 Wien, Austria
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15
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De Santis M, Becherer A, Bokemeyer C, Stoiber F, Oechsle K, Sellner F, Lang A, Kletter K, Dohmen BM, Dittrich C, Pont J. 2-18fluoro-deoxy-D-glucose Positron Emission Tomography Is a Reliable Predictor for Viable Tumor in Postchemotherapy Seminoma: An Update of the Prospective Multicentric SEMPET Trial. J Clin Oncol 2004; 22:1034-9. [PMID: 15020605 DOI: 10.1200/jco.2004.07.188] [Citation(s) in RCA: 250] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Purpose To define the clinical value of 2-18fluoro-deoxy-D-glucose positron emission tomography (FDG PET) as a predictor for viable residual tumor in postchemotherapy seminoma residuals in a prospective multicentric trial. Patients and Methods FDG PET studies in patients with metastatic pure seminoma who had radiographically defined postchemotherapy residual masses were correlated with either the histology of the resected lesion or the clinical outcome documented by computer tomography (CT), tumor markers, and/or physical examination during follow-up. The size of the residual lesions on CT, either > 3 cm or ≤ 3 cm, was correlated with the presence or absence of viable residual tumor. Results Fifty-six FDG PET scans of 51 patients were assessable. All 19 cases with residual lesions > 3 cm and 35 (95%) of 37 with residual lesions ≤ 3 cm were correctly predicted by FDG PET. The specificity, sensitivity, positive predictive value, and negative predictive value of FDG PET were 100% (95% CI, 92% to 100%), 80% (95% CI, 44% to 95%), 100%, and 96%, respectively, versus 74% (95% CI, 58% to 85%), 70% (95% CI, 34% to 90%), 37%, and 92%, respectively, for CT discrimination of the residual tumor by size (> 3 cm/≤ 3 cm). Conclusion This investigation confirms that FDG PET is the best predictor of viable residual tumor in postchemotherapy seminoma residuals and should be used as a standard tool for clinical decision making in this patient group.
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Affiliation(s)
- Maria De Santis
- Department of Medical Oncology, Kaiser Franz Josef Spital, Kundratstrasse 3, A-1100 Wien, Austria
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16
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Nakahara T, Fujii H, Hashimoto J, Yabe H, Morioka H, Kubo A. Thallium-201 single-photon emission computed tomography in the detection of retroperitoneal schwannoma. Br J Radiol 2004; 77:57-9. [PMID: 14988140 DOI: 10.1259/bjr/83483923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
We describe a patient with retroperitoneal schwannoma whose tumour was detectable by 201Tl single-photon emission computed tomography (SPECT). Physiologic uptake in the alimentary tract did not hamper the interpretation on SPECT images. Uptake by the tumour extending along the spinal nerve root was well recognised in axial and coronal images. Our results suggest that 201Tl SPECT may be useful in the detection of retroperitoneal schwannomas.
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Affiliation(s)
- T Nakahara
- Department of Radiology, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
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17
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Fleming RM, Dooley WC. Breast enhanced scintigraphy testing distinguishes between normal, inflammatory breast changes, and breast cancer: a prospective analysis and comparison with mammography. Integr Cancer Ther 2002; 1:238-45. [PMID: 14667282 DOI: 10.1177/153473540200100303] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The detection of breast cancer has primarily focused on anatomic findings, whereas assessment of physiologic information using nuclear imaging has been used for the detection of heart disease. Using this approach, the authors developed a method (breast enhanced scintigraphy test [BEST]) for differentiation of breast tissue by enhancing the delivery of isotope. To determine if this technique could distinguish between normal (Nl), inflammatory changes of the breast (ICB), and breast cancer (CA), 100 women were prospectively studied using BEST imaging, and results were compared with mammography and pathology findings using either biopsy or ductoscopy approaches. Mammography demonstrated a sensitivity and specificity of 69% and 84%, respectively. Using BEST imaging, maximal count activity (MCA) was able to distinguish between Nl, ICB, and CA. The results of 2-tailed t test analysis demonstrated statistically significant differences between Nl and ICB MCA (P </=.001); ICB and CA MCA(P </=.001); and N1 and CA MCA(P </=.001). Using MCA results obtained via BEST imaging, breast tissue was able to be differentiated, whereas mammography was able to detect breast cancer in only 69% of cases and incorrectly identified cancer in 16% of cases.
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18
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Shvarts O, Han KR, Seltzer M, Pantuck AJ, Belldegrun AS. Positron emission tomography in urologic oncology. Cancer Control 2002; 9:335-42. [PMID: 12228759 DOI: 10.1177/107327480200900408] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Positron emission tomography (PET) is an emerging imaging modality that is being investigated for use in urologic oncology. PET scanning using the radioactive glucose analog FDG has proven to be a highly accurate imaging test for diagnosing and staging a variety of non-urologic cancer types. This review was performed to determine the role of PET imaging in genitourinary malignancies. METHODS A review of the literature focusing on PET and urologic oncology was performed. The role of PET imaging was reviewed in prostate, bladder, renal, and testicular cancer. RESULTS In testicular cancer, PET has a higher diagnostic accuracy than computed tomography (CT) for both staging and re-staging and should be the test of choice for the assessment of a CT-visualized residual mass following chemotherapy. In prostate, renal, and bladder cancer, the current role of PET is still being defined, but it has a high positive predictive value and can be used for problem solving in patients with indeterminate findings on conventional imaging. Its role in the diagnosis and staging of prostate cancer is hampered by the generally low glycolytic rate of most prostate tumors and their metastases. It has shown promise for staging and re-staging patients with advanced-stage disease and aggressive tumors suspected by a high tumor grade and high prostate-specific antigen velocity. PET has also demonstrated success when applied to renal cell carcinoma in classifying indeterminate renal masses as well as residual renal fossa masses following nephrectomy, gauging response to therapy, and staging and re-staging patients with a known diagnosis of renal cell carcinoma. CONCLUSIONS PET imaging has demonstrated great potential in certain applications, but further investigations are necessary to determine its eventual place as an imaging modality in genitourinary malignancies.
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Affiliation(s)
- Oleg Shvarts
- Department of Urology, University of California Los Angeles School of Medicine, Los Angeles, Calif 90095, USA
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19
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Knutson KL, Almand B, Mankoff DA, Schiffman K, Disis ML. Adoptive T-cell therapy for the treatment of solid tumours. Expert Opin Biol Ther 2002; 2:55-66. [PMID: 11772340 DOI: 10.1517/14712598.2.1.55] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Solid tumours can be eradicated by infusion of large amounts of tumour-specific T-cells in animal models. The successes seen in preclinical models, however, have not been adequately translated to human disease due, in part, to the inability to expand tumour antigen-specific T-cells ex vivo. Polyclonality and retention of antigen-specificity are two important properties of infused T-cells that are necessary for successful eradication of tumours. Investigators are beginning to evaluate the impact of attempting to reconstitute full T-cell immunity representing both major T-cell subsets, cytolytic T-cells and T-helper (Th) cells. One of the more important and often overlooked steps of successful adoptive T-cell therapy is the ex vivo expansion conditions, which can dramatically alter the phenotype of the T-cell. A number of cytokines and other soluble activation factors that have been characterised over the last decade are now available to supplement in vitro antigen presentation and IL-2. Newer molecular techniques have been developed and are aimed at genetically altering the characteristics of T-cells including their antigen-specificity and growth in vivo. In addition, advanced imaging techniques, such as positron emission tomography (PET), are being implemented in order to better define the in vivo function of ex vivo expanded tumour-specific T-cells.
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Affiliation(s)
- Keith L Knutson
- Division of Oncology, University of Washington, 1959 NE Pacific Street, HSB BB1321, Box 356527, Seattle, WA 98195-6527, USA.
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20
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Kukrej N, Cook GJ, Pattison JM. Positron-emission tomography used to diagnose tuberculosis in a renal transplant patient. Am J Transplant 2002; 2:105-7. [PMID: 12095049 DOI: 10.1034/j.1600-6143.2002.020117.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We describe the case of a 22-year-old Portuguese renal transplant patient whose post-transplant course was complicated by prolonged delayed graft function and pyrexia of unknown origin. Conventional imaging techniques were not definitive, but positron-emission tomography (PET) scanning identified abnormalities in the lung and mediastinum that led to a diagnostic biopsy demonstrating mycobacterial infection.
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Affiliation(s)
- Neville Kukrej
- Department of Renal Medicine, Guy's Hospital, London, UK.
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21
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Melanocitosis dérmicas atípicas y patología sistémica asociada. ACTAS DERMO-SIFILIOGRAFICAS 2002. [DOI: 10.1016/s0001-7310(02)76630-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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22
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Wang PH, Chao HT, Liu RS, Cho YH, Ng HT, Yuan CC. Diagnosis and localization of testosterone-producing ovarian tumors: imaging or biochemical evaluation. Gynecol Oncol 2001; 83:596-8. [PMID: 11733978 DOI: 10.1006/gyno.2001.6412] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVE In the testosterone-secreting ovarian tumor (TSOT), the role of whole-body positron emission tomography (WBPET) with (fluorine-18)-2-deoxyglucose scanning (FDG) and/or [(11)C]acetate is unclear, although it presents a rationale that these functional tumors would be more active and have increased use of glucose and oxygen consumption than normal tissues. CASE A 52-year-old woman had a history of steroid cell tumors of the right ovary (IIA) and she received staging surgery including total hysterectomy, salpingo-oophorectomy, and lymph node sampling. Reelevated serum levels of T (5.24 ng/ml) were noted 52 months later. The patient received serial preoperative examinations including WBPET with FDG and acetate, ultrasound, computerized tomography (CT), and magnetic resonance imaging (MRI) to evaluate her recurrence. A suspicious mass on the liver was found on ultrasound, CT, and MRI. The ultrasound-guided biopsy was performed three times, and each of them failed to provide any pathological confirmation. Functional imaging studies showed an abnormal uptake in WBPET using [(11)C]acetate but were negative using FDG. Because of the size of the tumor, the patient's hesitatancy toward an operation, and good previous response to gonadotropin-releasing hormone (GnRH) agonist treatment, the patient received a six-cycle GnRH agonist treatment. Serum T levels returned to normal limits after administration of the first dose of GnRH agonist. At follow-up, serum hormone levels were all within the normal ranges consistent with menopause, but the size of the metastatic tumor was constant. The tumor was then completely excised pathologically proven to be a metastatic TSOT. CONCLUSIONS Recurrent TSOT might be successfully detected using WBPET with [(11)C]acetate. In addition, GnRH agonist could be tried in patients with TSOT if initial responses were excellent and surgical intervention could not be performed.
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Affiliation(s)
- P H Wang
- Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan.
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Vaylet F, de Dreuille O, L'her P, Maszelin P, Guigay J, Foehrenbach H, Grassin F, Margery J, Gaillard JF. [Interest in 18-FDG positron emission tomography in radiotherapy planning: example of lung cancer radiotherapy]. Cancer Radiother 2001; 5:685-90. [PMID: 11715319 DOI: 10.1016/s1278-3218(01)00127-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
18 FDG positon emission tomography provides metabolic images and allows better local and metastatic staging than radiologic methods. A best cartography of node involvement and a best delineation of the tumor zone should allow an optimal radiotherapy. Lung cancer is a good example of the interest of this new method.
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Affiliation(s)
- F Vaylet
- Service des maladies respiratoires, hôpital d'instruction des armées Percy, 101, avenue Henri-Barbusse, 92141 Clamart, France.
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24
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De Santis M, Bokemeyer C, Becherer A, Stoiber F, Oechsle K, Kletter K, Dohmen BM, Dittrich C, Pont J. Predictive impact of 2-18fluoro-2-deoxy-D-glucose positron emission tomography for residual postchemotherapy masses in patients with bulky seminoma. J Clin Oncol 2001; 19:3740-4. [PMID: 11533096 DOI: 10.1200/jco.2001.19.17.3740] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE To establish the predictive potential of 2-18fluoro-2-deoxy-D-glucose positron emission tomography (FDG PET) for detecting viable tumor tissue in residual postchemotherapy masses of seminoma patients. PATIENTS AND METHODS In this prospective multicenter trial, results of FDG PET studies in seminoma patients with postchemotherapy masses > or = 1 cm were correlated with either the histology of the resected lesion or the clinical outcome on follow-up without resection. Negative PET scans of residual lesions that were devoid of viable tumor tissue on resection or disappeared, shrunk, or remained stable in size for at least 2 years were rated as true-negative (TN). Positive scans without histologic or clinical evidence of tumor tissue were classified as false-positive. In patients with histologically positive or progressive lesions, positive PET scans were defined as true-positive (TP) and negative scans, false-negative (FN). RESULTS Thirty-seven PET scans of 33 patients were assessable at a median follow-up time of 23 months (range, 2 to 46 months). Histologic data were available from nine patients who had undergone resection. Twenty-eight patients were followed-up clinically and radiologically. Twenty-eight scans were TN, eight were TP, and one was FN. All 14 residual lesions more than 3 cm and 22 (96%) of the 23 < or = 3 cm were correctly predicted by FDG PET. The specificity (100%; 95% confidence interval [CI], 87.7% to 100%), sensitivity (89%; 95% CI, 51.7% to 99.7%), positive predictive value (100%), and the negative predictive value (97%) of FDG PET were superior to data obtained by assessing residual tumor size (< or = or > 3 cm). CONCLUSION FDG PET is a clinically useful predictor of viable tumor in postchemotherapy residuals of pure seminoma, especially those greater than 3 cm.
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Affiliation(s)
- M De Santis
- Department of Medical Oncology and Luwdig Boltzmann Institute for Applied Cancer Research, Kaiser Franz Josef Spital, Wien, Austria
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25
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Krohn KA, Mankoff DA, Eary JF. Imaging Cellular Proliferation as a Measure of Response to Therapy. J Clin Pharmacol 2001. [DOI: 10.1177/0091270001417014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
| | | | - Janet F. Eary
- Division of Nuclear Medicine, University of Washington, Seattle
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Abstract
PURPOSE Testicular tumors do not occur frequently. Primary treatment is surgical, and radiotherapy and chemotherapy can play important roles in cases of metastatic disease. Bone scintigraphy is used largely for early detection of skeletal metastases from several tumors, and conventional radiographic studies are less sensitive than the nuclear technique for such a purpose. The aim of this study was to identify the role of bone scintigraphy in cases of testicular tumors, regardless of the grade. MATERIALS AND METHODS The authors examined 28 patients (8 to 52 years old) with proved testicular tumors using Tc-99m MDP (750 MBq; 20 mCi) injected intravenously. Whole-body images were obtained 2 hours later, at 500,000 counts per image. Radiographic studies were obtained to investigate abnormal areas noted on scintigraphy. RESULTS The results of bone scintigraphy were abnormal in seven cases, consisting of variable but diffuse uptake in the iliac bone on the same side as the affected testicle. MDP uptake was substantial in five of these patients (four seminomas, one nonseminoma; only two radiographic studies were abnormal), and the two other patients had moderate uptake of the radiopharmaceutical (two seminomas; radiographic studies were normal). Metastases were confirmed by biopsy in three cases. DISCUSSION Early metastases from seminomas can occur through the lymphatic drainage toward the iliac lymph node chain. This could explain these findings. The scintigraphic aspects of the affected iliac bones seem characteristic. CONCLUSIONS Early detection of metastases is very important to ensure the efficacy of radiotherapy and chemotherapy. Bone scintigraphy may play an important role in such cases and seems to be more sensitive than conventional radiography. Testicular tumor metastases should be considered when iliac involvement is observed. Paget's disease should be included in a differential diagnosis.
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Affiliation(s)
- F J Braga
- Department of Physics and Biophysics, the Bio-Science Institute, UNESP, Botucatu, Brazil.
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Abstract
Biomarkers are routinely applied in the management of chronic diseases to reduce morbidity and mortality through early diagnosis, as well as to assess the necessity for, and responsiveness to, applied interventions. Biomarkers yield mechanistic insights into layers of biologic organization from molecule to organelle, to cell, and finally to cellular organization and tissue. A step-wise approach to the development of tissue-based biomarkers is presented. These biomarkers may serve as molecular targets for scientific inquiry and intervention, as well as approvable endpoints for clinical trials.
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Affiliation(s)
- E Hawk
- DCP/GI and Other Cancer Research Group, National Cancer Institute, EPN, Suite 201, 6130 Executive Boulevard, Bethesda, MD 20892-7322, USA.
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Mankoff DA, Dehdashti F, Shields AF. Characterizing tumors using metabolic imaging: PET imaging of cellular proliferation and steroid receptors. Neoplasia 2000; 2:71-88. [PMID: 10933070 PMCID: PMC1531868 DOI: 10.1038/sj.neo.7900075] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Treatment decisions in oncology are increasingly guided by information on the biologic characteristics of tumors. Currently, patient-specific information on tumor biology is obtained from the analysis of biopsy material. Positron emission tomography (PET) provides quantitative estimates of regional biochemistry and receptor status and can overcome the sampling error and difficulty in performing serial studies inherent with biopsy. Imaging using the glucose metabolism tracer, 2 -deoxy-2- fluoro-D-glucose (FDG), has demonstrated PET's ability to guide therapy in clinical oncology. In this review, we highlight PET approaches to imaging two other aspects of tumor biology: cellular proliferation and tumor steroid receptors. We review the biochemical and biologic processes underlying the imaging, positron-emitting radiopharmaceuticals that have been developed, quantitative image-analysis considerations, and clinical studies to date. This provides a basis for evaluating future developments in these promising applications of PET metabolic imaging.
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Affiliation(s)
- D A Mankoff
- Department of Radiology, University of Washington, Seattle, USA
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Abstract
Nuclear medicine provides the surgeon with important diagnostic and functional information on specific organs and with therapy for a limited set of diseases. Clinical applications of nuclear medicine are beginning to guide surgeons to specific locations, notably to sentinel lymph nodes in patients with cancer. The role of radionuclide diagnosis in oncology has been covered earlier in this Lancet series, so here is a surgeon's perspective on sentinel node and other oncological applications and on the surgical value of nuclear medicine in non-malignant diseases.
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Affiliation(s)
- D Krag
- Department of Surgery, University of Vermont, Burlington 05405-0068, USA.
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