title: Spontaneous disruption of the bilateral knee extensor mechanism: a report of two cases.
abstract: Spontaneous disruption of the knee extensor mechanism is associated with systemic diseases, steroid usage, and repeated microtrauma. Early repair or reconstruction is imperative for optimal outcome. We report 2 cases of spontaneous disruption of the bilateral knee extensor mechanism. The first patient had connective tissue disease and long-term steroid use. She had acute-on-chronic spontaneous bilateral patellar tendon rupture. She underwent reconstruction with an allograft and defunctioning wire. The second patient had end-stage renal failure with tertiary hyperparathyroidism and was on haemodialysis. He had a right patellar tendon rupture and a left quadriceps tendon rupture. He underwent primary repair of both tendons. Postoperatively, both patients followed a strict physiotherapy regimen and achieved good functional outcome.
authors: Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.
authors: Chusheng
authors: C
authors: Seng
authors: Department of Orthopaedic Surgery, Changi General Hospital, Singapore.
authors: Yi-Jia
authors: YJ
authors: Lim
authors: Department of Orthopaedic Surgery, Singapore General Hospital, Singapore.
authors: Hee Nee
authors: HN
authors: Pang
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis / Q000601:surgery*; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D019637:Orthopedic Procedures / Q000379:methods; D017847:Patellar Ligament / Q000637:transplantation*; D011859:Radiography; D012421:Rupture; D013708:Tendon Injuries / Q000601:surgery*; D013710:Tendons / Q000601:surgery*
keywords: knee injuries; tendons