Radiographic changes in arthrogrypotic knees.

We evaluated the knees of 62 patients with arthrogryposis multiplex congenita radiographically. Abnormal radiographs were noted in 34. The abnormalities consisted of both congenital and chronic changes secondary to long-standing clinical deformities including patellar elongation, malposition, flattening of the femoral condyles, joint incongruity, tibial plateau irregularities, tibial and femoral fractures, fibula hypoplasia, soft-tissue thickening, valgus deformity, and dislocation. The radiographic findings were consistent with the degree of longstanding physical deformity and can be used as a guide to the severity of the condition and the need for treatment.