title: Snapping knee symptoms caused by an intra-articular ganglion cyst.
abstract: Snapping knee syndrome describes the sudden movement of a soft-tissue structure across a bony prominence around the knee with a popping sound at some specific activity. Symptomatic snapping knee syndrome may result from an intra-articular tumor, but this situation is rare. To the best of our knowledge, an intra-articular ganglion cyst leading to snapping knee has not been reported previously. A 20 year old female with painful snapping knee was successfully treated by open en-bloc excision of the ganglion cyst sized 4.5 x 1.5 x 1 cm on the ligamentum mucosum. Snapping and pain were completely relieved after surgery. Although the snapping knee is not common over the antero-lateral portion of the knee joint, a ganglion cyst from the ligamentum mucosum is a possible cause.
authors.affiliation: Department of Orthopedics, Faculty of Medical School, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
authors.forename: Ping-Cheng
authors.initials: PC
authors.lastname: Liu
authors.forename: Chung-Hwan
authors.initials: CH
authors.lastname: Chen
authors.forename: Hsuan-Ti
authors.initials: HT
authors.lastname: Huang
authors.forename: Je-Ken
authors.initials: JK
authors.lastname: Chang
authors.forename: Jian-Chih
authors.initials: JC
authors.lastname: Chen
authors.forename: Yin-Chun
authors.initials: YC
authors.lastname: Tien
authors.forename: Shao-Hung
authors.initials: SH
authors.lastname: Hung
mesh_terms: D000328:Adult; D005260:Female; D045888:Ganglion Cysts / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D007592:Joint Diseases / Q000209:etiology* / Q000601:surgery; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D010146:Pain / Q000209:etiology / Q000601:surgery; D014463:Ultrasonography