title: Focal xanthogranulomatous pyelonephritis with associated bone metaplasia.
abstract: Focal xanthogranulomatous pyelonephritis of the left lower pole was accidentally discovered in a 34-year-old woman at sonography. The patient had no history of stones and urinary tract infection and both conventional radiology and CT scan revealed radiated calcifications within a well-circumscribed mass. Surgical treatment consisted of enucleoresection of the lesion, and histopathology revealed a nucleus of bone metaplasia. To the best of our knowledge, metaplastic bone formation has never been documented before with xanthogranulomatous pyelonephritis.
authors.affiliation: Department of Urology, University of Udine, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Selli
authors.forename: P
authors.initials: P
authors.lastname: De Antoni
authors.forename: U
authors.initials: U
authors.lastname: Moro
authors.forename: A
authors.initials: A
authors.lastname: Crisci
authors.forename: R
authors.initials: R
authors.lastname: Bartoletti
authors.forename: C A
authors.initials: CA
authors.lastname: Scott
mesh_terms: D000328:Adult; D001842:Bone and Bones / Q000473:pathology*; D005260:Female; D006801:Humans; D008679:Metaplasia / Q000209:etiology; D011705:Pyelonephritis, Xanthogranulomatous / Q000150:complications*