title: Huge pelvic mass secondary to wear debris causing ureteral obstruction.
abstract: We report an unusual granulomatous reaction of wear debris that produced a huge pelvic mass causing ureteral obstruction. A 72-year-old woman, who received a cemented total hip arthroplasty 30 years ago, was referred to the department of gynecology for examination of a pelvic mass. A computed tomography scan revealed a huge homogenous mass, measuring approximately 20 x 16 x 12 cm, including extensive osteolysis of the left pelvis around the acetabular component. Intravenous pyelogram revealed complete obstruction of the left ureter resulting in hydronephrosis of the left kidney. Histological examination from the biopsy specimen detected polyethylene wear debris in the mass.
authors.affiliation: Center of Arthroplasty, Kyowakai Hospital, Osaka, Japan.
authors.forename: Takehito
authors.initials: T
authors.lastname: Hananouchi
authors.forename: Masanobu
authors.initials: M
authors.lastname: Saito
authors.forename: Nobuo
authors.initials: N
authors.lastname: Nakamura
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Kazuo
authors.initials: K
authors.lastname: Yonenobu
mesh_terms: D000328:Adult; D005260:Female; D005547:Foreign Bodies / Q000150:complications*; D006622:Hip Prosthesis; D006801:Humans; D020959:Polyethylene; D011475:Prosthesis Failure; D014517:Ureteral Obstruction / Q000209:etiology*
chemical_list: D020959:Polyethylene