Isolated posterior cruciate ligament rupture presenting as a locked knee.

Mechanical symptoms in the knee, especially locking, are most commonly associated with meniscal pathology. We present an atypical case of locking of the knee secondary to an isolated posterior cruciate ligament tear.

Proximal femoral radiographic changes after lateral transtrochanteric intramedullary nail placement in children.

Background: Recent reports have described osteonecrosis of the femoral head after intramedullary nailing of the femur through the piriformis fossa in children. Other reports have raised concerns about the development of femoral neck narrowing and valgus deformity of the proximal part of the femur after intramedullary nailing through the tip of the greater trochanter. We evaluated the radiographic changes in the proximal part of the femur following intramedullary nailing through the lateral trochanteric area at a minimum of two years postoperatively in twenty-five affected extremities.