title: Pigmented villonodular synovitis of the hip presenting as a buttock mass treated by total hip arthroplasty.
abstract: Pigmented villonodular synovitis (PVNS) of the hip is a relatively uncommon benign but locally aggressive disease that should be considered in younger patients presenting with monoarticular joint symptoms. Pigmented villonodular synovitis begins in and usually remains confined within a synovium-lined joint, but rarely, it may extend beyond the joint capsule and present as a soft tissue mass. The authors report a previously unrecognized presentation of PVNS of the hip in a 36-year-old man, who presented with a buttock mass arising from the right hip joint. The patient was treated by synovectomy and total hip arthroplasty.
authors.affiliation: Center for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun-Gun, Jeonnam, Republic of Korea.
authors.forename: Kyung Soon
authors.initials: KS
authors.lastname: Park
authors.forename: Sanket R
authors.initials: SR
authors.lastname: Diwanji
authors.forename: Hyun Kee
authors.initials: HK
authors.lastname: Yang
authors.forename: Taek Rim
authors.initials: TR
authors.lastname: Yoon
authors.forename: Jong Keun
authors.initials: JK
authors.lastname: Seon
mesh_terms: D000328:Adult; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D002081:Buttocks; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D008297:Male; D011859:Radiography; D055502:Secondary Prevention; D000074402:Synovectomy; D013586:Synovitis, Pigmented Villonodular / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*