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CASE REPORT
Year : 2020  |  Volume : 19  |  Issue : 1  |  Page : 72-77

Head-to-head comparison of [18F]-fluorodeoxyglucose and [18F]-fluorocholine positron emission tomography/computed tomography in three patients with rare gestational trophoblastic neoplasms: A case series


1 Department of Radiology, Division of Nuclear Medicine; NANOTEC-Mahidol University Center of Excellence in Nanotechnology for Cancer Diagnosis and Treatment, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
2 Department of Radiology, Division of Nuclear Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
3 Department of Neurosurgery, Oncology, OBGYN, Biomedical Engineering, School of Medicine, College of Engineering, and Karmanos Cancer Institute, Wayne State University, Detroit, Michigan, USA

Correspondence Address:
Dr. Tanyaluck Thientunyakit
Department of Radiology, Division of Nuclear Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok 10700
Thailand
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DOI: 10.4103/wjnm.WJNM_91_18

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We report the efficacy of dual positron emission tomography/computed tomography (PET/CT) imaging with [18F]-2'-fluoro-2'-deoxy-D-glucose ([18F]-FDG) and [18F]-fluorocholine ([18F]-FCH) in patients with gestational trophoblastic neoplasia (GTN) for primary diagnosis and staging of this rare pregnancy-related disorder. Whole-body PET/CT with [18F]-FDG and [18F]-FCH was performed in three patients with GTN in 2 consecutive days. Each detectable lesion was characterized by visual and quantitative analyses. As compared to CT alone, PET/CT with [18F]-FDG and [18F]-FCH PET/CT revealed more hypermetabolic metastatic lesions in the body, but not in the brain. The standard uptake value of [18F]-FDG was generally higher than [18F]-FCH in all detectable tumor lesions. In conclusion, both [18F]-FDG and [18F]-FCH PET/CT can be used for diagnosis and staging for GTN, based on their sensitivity for small extracerebral metastatic lesions. Additional studies are warranted to determine whether the PET/CT imaging with [18F]-FDG and [18F]-FCH can serve as a biomarker of GTN aggressiveness, for prediction of treatment response.


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