title: The management of superior dislocation of the patella with interlocking osteophytes--an update on a rare problem.
abstract: The superior dislocation of the patella with interlocking osteophytes is a rare condition. A review of the English literature revealed only 12 reported cases. The purpose of reviewing these case reports is to highlight the unusual presentation and the injury mechanism in 2 of our patients, and to present our treatment algorithm. Closed reduction with manipulation of the patella, with or without anaesthesia, was performed without difficulty. We recommend an intermediate step of trying a regional nerve block before proceeding to general anaesthesia. Our patients had full range-of-motion after reduction and they were symptom-free after 3 years of follow-up. There were no recurrent dislocations in our patients.
authors.affiliation: Department of Orthopaedics and Traumatology, The University of Hong Kong, Queen Mary Hospital, Hong Kong. dkhyip@hku.hk
authors.forename: D K H
authors.initials: DK
authors.lastname: Yip
authors.forename: J W K
authors.initials: JW
authors.lastname: Wong
authors.forename: L K
authors.initials: LK
authors.lastname: Sun
authors.forename: N M
authors.initials: NM
authors.lastname: Wong
authors.forename: C W
authors.initials: CW
authors.lastname: Chan
authors.forename: P Y
authors.initials: PY
authors.lastname: Lau
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D031222:Patellar Dislocation / Q000000981:diagnostic imaging / Q000601:surgery*; D011859:Radiography; D016059:Range of Motion, Articular