Kazi, SakibRaptis, StavrosAbbaspour, FarzadZeng, Wanzhen2022-09-202022-09-202022-09-15European Journal of Hybrid Imaging. 2022 Sep 15;6(1):18https://doi.org/10.1186/s41824-022-00137-2https://doi.org/10.20381/ruor-28287http://hdl.handle.net/10393/44074Abstract Foreign body-type giant cell reaction is typically a biological and immunological reaction to the presence of foreign bodies such as catheters, parasites or biomaterials with a collection of fused macrophages (giant cell). We reported an unusual case of [18F]FDG PET findings in diffuse large B cell lymphoma in the urinary bladder following incomplete resection and chemotherapy. As the restaging [18F]FDG PET showed intense [18F]FDG uptake in the urinary bladder at the resection site concerning for recurrence, the lesion was subsequently resected and histopathology showed extensive granulation tissue with foreign body-type giant cell reaction with no suspected foreign bodies or neoplasia.Journal Article2022-09-20enThe Author(s)