A patient with multiple sclerosis (MS) and severe osteoarthritis of the right knee with valgus deformity developed early in the postoperative period a posterior dislocation of the knee after total knee arthroplasty (TKA), due to severe spasm of her hamstring muscles. At revision surgery the posterior cruciate retaining prosthesis was exchanged for a non-linked constrained knee prosthesis. Techn...

Case A 4-year-old girl injured her left leg while tobogganing. She complained of immediate pain in her left knee and refused to bear weight through her left lower extremity. Her family brought her to the local emergency department where radiographs of the left knee were obtained; radiographic findings of the knee were normal (Figure 1). It was believed that the patient had a soft tissue injury ...

Bilateral knee dislocations are rare. We report one such case in a 22-year-old man. His clinical presentation, radiographical findings, and the operative and non-operative treatments are discussed, with emphasis on the timing of treatment and rehabilitation.

BACKGROUND Recurrent dislocation of the patella in patients with below knee amputation is a known entity. Abnormally high-riding patella (patella alta) and medial patellofemoral ligament insufficiency in these patients predisposes them to patellar instability. The established treatment of this problem is surgical realignment. CASE PRESENTATION A 25 year old male patient with bilateral below k...

Dislocation of the patella may be congenital, it may be due to injury, or it may be simply habitual or recurrent, with some basic defect in the anatomy of the knee region. This review concerns the recurrent type, occurring either spontaneously or after minor injury. Patients with recurrent patellar dislocations may have any ofthe following abnormalities: I ) a high-riding patella with an elonga...

BACKGROUND Choice of hospital based on comparative performance information (CPI) was introduced for Dutch healthcare consumers at least 5 years ago, but CPI use has not yet become commonplace. Our aim was to assess the role of patients' expectations regarding variation in the quality of hospital care in determining whether they search for CPI. METHODS A questionnaire (for a cross-sectional su...

Superior dislocation of the patella without patellar ligament injury is an extremely rare condition. A review of the English-language literature found only 23 reported cases. In addition, the primary factor for dislocation in most of these cases was considered to be osteophytes in the inferior pole of the patella and the anterior surface of the femoral condyle; only 1 case had no osteophytes. W...