Locked knee from superior dislocation of the patella-diagnosis and management of a rare injury.
Knee locking is often caused by a torn meniscus or loose body. A rare cause of knee locking is a superior dislocation of the patella following trauma with less than 20 reported cases in the English literature. An unusual case of a locked knee secondary to interlocking osteophytes between the medial femoral condyle and the inferior pole of the patella without any history of trauma is presented.
Department of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore. mohd.mashfiqul@gmail.com
Mashfiqul A
MA
Siddiqui
M H
MH
Tan
D000208:Acute Disease; D000368:Aged; D005500:Follow-Up Studies; D006801:Humans; D021621:Imaging, Three-Dimensional; D007594:Joint Loose Bodies / Q000150:complications / Q000000981:diagnostic imaging; D007718:Knee Injuries / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008297:Male; D054850:Osteophyte / Q000150:complications* / Q000000981:diagnostic imaging; D031222:Patellar Dislocation / Q000150:complications* / Q000000981:diagnostic imaging / Q000628:therapy; D016059:Range of Motion, Articular / Q000502:physiology*; D035583:Rare Diseases; D012307:Risk Factors; D014057:Tomography, X-Ray Computed / Q000379:methods