Figure 2From: First-time patellar dislocation with resultant habitual dislocation two years later, which was not demonstrated on plain X-rays halfway: a case report Bilateral X-rays of the lower extremities, including skyline view. The modified Q-angle is 36° (Fig. 2-A). The skyline view demonstrates that the patella is dislocated at 45°, 60°, and 90° of flexion in contrast to the contralateral side, which is consistently in position at the femoral trochlea (Fig. 2-B).Back to article page