title: [False positive (18)F-FDG PET/CT uptake by fat necrosis during chemotherapy for malignant lymphoma].
abstract: A 44-year-old man with advanced follicular lymphoma received 8 cycles of chemotherapy, which resulted in the complete disappearance of the original disease. However, a new abdominal mass with positive (18)F-FDG PET/CT uptake appeared after 5 cycles and this was maintained until 3 weeks after the completion of 8 cycles. Open biopsy showed a benign mass with fat necrosis. Although PET/CT is useful in evaluating residual lymphoma after chemotherapy, various benign conditions such as a result of post-chemotherapy inflammation, even in new locations without prior disease, should be noted as causes of false positive uptake.
authors: Department of Hematology, Ome Municipal General Hospital.
authors: Hiroki
authors: H
authors: Akiyama
authors: Yoshihiro
authors: Y
authors: Umezawa
authors: Yosuke
authors: Y
authors: Nakamura
authors: Takashi
authors: T
authors: Kumagai
mesh_terms: D000328:Adult; D005189:False Positive Reactions; D005218:Fat Necrosis / Q000378:metabolism; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008223:Lymphoma / Q000000981:diagnostic imaging*; D008297:Male; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D014057:Tomography, X-Ray Computed / Q000379:methods
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18