title: Xanthoma of the bladder.
abstract: We report a case of xanthoma of the bladder incidentally discovered during transurethral ureteral lithotripsy for a right ureteral stone and histopathologically diagnosed by cold cup biopsy. Xanthoma, a disorder of the lipid metabolism without tumorous or inflammatory changes, is rare in the bladder with only 7 cases reported previously. Interestingly, 5 of these 7 cases were reported in the Japanese literature, as were cases of xanthogranulomatous cystitis. We have no explanation for this occurrence. Xanthoma, caused by macrophages with the ability to phagocytose, is a benign lesion. It is necessary to continue careful followup by cystoscopy to determine if xanthoma increases or decreases in size.
authors.affiliation: Department of Urology, Minoh City Hospital, Osaka, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nishimura
authors.forename: M
authors.initials: M
authors.lastname: Nozawa
authors.forename: T
authors.initials: T
authors.lastname: Hara
authors.forename: T
authors.initials: T
authors.lastname: Oka
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D001745:Urinary Bladder Diseases / Q000175:diagnosis; D014973:Xanthomatosis / Q000175:diagnosis