Temporomandibular joint neoplasms and pseudotumors.

Neoplasms and pseudotumors of the temporomandibular joint (TMJ) are very uncommon. Early recognition of such will prevent therapeutic delay and may have a dramatic impact on patient morbidity and mortality. Included in rare TMJ lesions are the following: 1) synovial chondromatosis, 2) osteochondroma, 3) osteoma, 4) osteoblastoma, 5) pigmented villonodular synovitis, 6) ganglion, 7) synovial cyst, 8) simple bone cyst, 9) aneurysmal bone cyst, 10) epidermal inclusion cyst, 11) hemangioma, 12) nonossifying fibroma, 13) Langerhans cell histiocytosis, 14) plasma cell myeloma, 15) sarcoma.