title: Intraarticular fibroma of the posterior compartment in the knee. A case report.
abstract: Posterior knee discomfort and recurrent effusion of the left knee occurred in a 49-year-old man without a history of specific trauma. Magnetic Resonance Imaging (MRI) and an arthroscopic examination revealed a soft tissue mass arising from the posterolateral capsule. The microscopic diagnosis was a fibroma, which is a rare entity in this location. To the best of our knowledge, only four cases of fibroma in the knee have been reported. It was reported that more than 99% of fibromas arise from tendon sheaths or tendons. They sometimes present a diagnostic problem due to their relative rarity in this location and obscure histological features. Fibroma should be included in a differential diagnosis of a soft tissue tumor arising from the knee joint. However, an arthroscopic excision was curative in our case.
authors.affiliation: Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
authors.forename: Jin Hwan
authors.initials: JH
authors.lastname: Ahn
authors.forename: Yong Seuk
authors.initials: YS
authors.lastname: Lee
authors.forename: Dong Hoon
authors.initials: DH
authors.lastname: Lee
authors.forename: Hae Chan
authors.initials: HC
authors.lastname: Ha
mesh_terms: D001182:Arthroscopy; D005350:Fibroma / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007719:Knee Joint / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012983:Soft Tissue Neoplasms / Q000473:pathology* / Q000601:surgery