title: Sarcoidosis presenting as prepatellar bursitis.
abstract: A 61-year-old woman complained of a subcutaneous mass in her right knee. MR images revealed a well-defined subcutaneous mass in the prepatellar region, containing some fluid and foci of short T2. The lesion showed some marginal contrast uptake after an administration of meglumine gadopentetate (Gd-DTPA), consistent with prepatellar bursitis. The pathological specimen, however, revealed subcutaneous sarcoidosis involving the bursa.
authors.affiliation: Department of Radiology, Numazu City Hospital, Numazu, Shizuoka, Japan. hfujimot@lilac.ocn.ne.jp
authors.forename: Hajime
authors.initials: H
authors.lastname: Fujimoto
authors.forename: Ryota
authors.initials: R
authors.lastname: Shimofusa
authors.forename: Katsuhito
authors.initials: K
authors.lastname: Shimoyama
authors.forename: Ryota
authors.initials: R
authors.lastname: Nagashima
authors.forename: Masanobu
authors.initials: M
authors.lastname: Eguchi
mesh_terms: D002062:Bursitis / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D017847:Patellar Ligament / Q000473:pathology*; D012507:Sarcoidosis / Q000175:diagnosis*