Hoffa's fracture in a five-year-old child diagnosed and treated with the assistance of arthroscopy: A case report

Figure 1 X-ray before surgery shows a stable fracture in the medial femoral condyle with no displacement. A: Anterior-posterior view of X-ray; B: Lateral view of X-ray.

Figure 2 Magnetic resonance imaging before surgery indicated no severe displacement. A: Sagittal slice of lateral condyle of femur; B: Most lateral slice of femoral intercondylar notch; C: Most medial slice of femoral intercondylar notch; D: Sagittal slice of medial condyle of femur.

Figure 3  Arthroscopy showed obvious fracture displacement of the cartilage.

Figure 4  The operation was completed using the medial parapatellar approach.

Figure 5 Six months after surgery, the range of motion of the knee joint reached 5°-100°. A: Maximum flexion position; B: Maximum extension position.

Figure 6 Plain radiographs showed a well-healed fracture with no evidence of collapse of the femoral condyle. A: Anterior-posterior view of X-ray; B: Lateral view of X-ray.

Figure 7 At the final follow-up of 40 months, the patient had full range of motion. A: Maximum flexion position; B: Maximum extension position