title: Intra-articular fibroma of tendon sheath in a knee joint associated with iliotibial band friction syndrome.
abstract: Iliotibial band (ITB) friction syndrome is a common overuse injury typically seen in the active athlete population. A nodular lesion on the inner side of the ITB as an etiology or an accompanying lesion from friction syndrome has been rarely reported. A 45-year-old male presented with recurrent pain and a movable nodule at the lateral joint area, diagnosed as ITB friction syndrome. The nodule was confirmed as a rare intra-articular fibroma of the tendon sheath (FTS) on the basis of histopathologic findings. We describe the MRI findings, arthroscopic and pathologic features, in this case of intra-articular FTS presenting with ITB friction syndrome.
authors.affiliation: Department of Radiology, Dong-A University Medical Center, Busan 602-715, Korea.
authors.forename: Dong-Ho
authors.initials: DH
authors.lastname: Ha
authors.affiliation: Department of Radiology, Dong-A University Medical Center, Busan 602-715, Korea.
authors.forename: Sunseob
authors.initials: S
authors.lastname: Choi
authors.affiliation: Department of Pathology, Dong-A University Medical Center, Busan 602-715, Korea.
authors.forename: Soo-Jin
authors.initials: SJ
authors.lastname: Kim
authors.affiliation: Department of Orthopedics, Dong-A University Medical Center, Busan 602-715, Korea.
authors.forename: Wang
authors.initials: W
authors.lastname: Lih
mesh_terms: D012090:Cumulative Trauma Disorders / Q000150:complications / Q000175:diagnosis*; D005350:Fibroma / Q000209:etiology*; D017276:Friction; D006801:Humans; D058745:Iliotibial Band Syndrome / Q000150:complications / Q000175:diagnosis*; D007719:Knee Joint / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology; D013710:Tendons / Q000473:pathology*
keywords: Fibroma of tendon sheath; Iliotibial band friction syndrome; Knee; Magnetic resonance imaging