Imaging of Tumor-like and Cyst-like Lesions of the Temporomandibular Joints.

Radiolucent and radiopaque lesions of the temporomandibular joints (TMJs) mimicking cysts and tumors are rare. Some lesions in the TMJ complex are intraosseous, while others are in the joint spaces. Intraosseous lesions include cyst-like lesions, for example, subcortical pseudocysts, aneurysmal bone cysts, and simple bone cysts. Lesions in the joint spaces include low-density synovial and ganglion cysts and calcified entities such as synovial chondromatosis and calcium pyrophosphate deposits. This article discusses common cyst-like and tumor-like conditions encountered in the TMJs and their imaging features. The advantages and limitations of the imaging techniques are briefly discussed.