Tenderness on palpation of the medial and lateral joint lines suggests a more diffuse disease, which cannot be adequately treated with isolated patellofemoral arthroplasty.

• 中间和侧边的关节线的压痛提示一个更加广泛的病变，这个病变并不能通过孤立性髌骨股骨关节成形术得到充分的治疗。