Even though pigmented villonodular synovitis in temporomandibular joint is a rare condition, it should be included in differential diagnoses for patients with pre-auricular painful nodule.

• 虽然色素沉著绒毛结节性滑液膜炎于颞下颌关节是个少见的情形，对于耳前疼痛性结节的病人仍应该将它列入鑑别诊断。