title: Abnormal 18F-FDG uptakes in the prostate due to two different conditions of urine reflux: a mimicker of prostate cancer.
abstract: A 69-year-old man with lung cancer underwent 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT for staging. FDG PET/CT showed high uptakes in the prostate gland with calcification, and magnetic resonance imaging was recommended to check the prostatic malignancy. T2-weighted images revealed midline cystic lesion at the base to midgland level and cystic lesion in right apical peripheral zone. We suspected urine reflux conditions. Voiding cystourethrography demonstrated those cystic lesions were communicating with the urethra. Therefore these lesions were diagnosed as the prostatic utricle cyst and the dilated prostatic duct in peripheral zone. We conclude that the urine reflux condition should be recognized as a prostate benign lesion with FDG accumulation.
authors.affiliation: Department of Radiology, Dokkyo Medical University, 880 Kita-Kobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293 Japan.
authors.forename: Kensuke
authors.initials: K
authors.lastname: Inamura
authors.affiliation: Department of Radiology, Dokkyo Medical University, 880 Kita-Kobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293 Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Kaji
authors.affiliation: PET Center, Dokkyo Medical University Hospital, 880 Kita-Kobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293 Japan.
authors.forename: Setsu
authors.initials: S
authors.lastname: Sakamoto
authors.affiliation: Department of Urology, Dokkyo Medical University, 880 Kita-Kobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293 Japan.
authors.forename: Akinori
authors.initials: A
authors.lastname: Masuda
authors.affiliation: Department of Urology, Dokkyo Medical University, 880 Kita-Kobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293 Japan.
authors.forename: Takao
authors.initials: T
authors.lastname: Kamai
keywords: FDG-PET/CT; Prostate cancer; Prostatic utricle cyst; Urine reflux into the prostate
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