title: Urachal actinomycosis mimicking a urachal tumor.
abstract: A 26-year-old man presented with lower abdominal discomfort and a palpable mass in the right lower quadrant. An abdominal computed tomography (CT) scan revealed an abdominal wall mass that extended from the dome of the bladder. Fluorine-18 fluorodeoxyglucose (FDG) positron-emission tomography/CT (PET/CT) showed hypermetabolic wall thickening around the bladder dome area that extended to the abdominal wall and hypermetabolic mesenteric infiltration. Differential diagnosis included a urachal tumor with invasion into adjacent organs and chronic inflammatory disease. Partial cystectomy with abdominal wall mass excision was performed, and the final pathologic report was consistent with urachal actinomycosis.
authors.affiliation: Department of Urology, College of Medicine, Hanyang University, Seoul, Korea.
authors.forename: Kyoung Taek
authors.initials: KT
authors.lastname: Lim
authors.forename: Seung Jin
authors.initials: SJ
authors.lastname: Moon
authors.forename: Joon Seok
authors.initials: JS
authors.lastname: Kwon
authors.forename: Young Woo
authors.initials: YW
authors.lastname: Son
authors.forename: Hong Yong
authors.initials: HY
authors.lastname: Choi
authors.forename: Yun Young
authors.initials: YY
authors.lastname: Choi
authors.forename: Ju Yeon
authors.initials: JY
authors.lastname: Pyo
authors.forename: Yong Wook
authors.initials: YW
authors.lastname: Park
authors.forename: Hong Sang
authors.initials: HS
authors.lastname: Moon