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Synovial chondromatosis of the tempromandibular joint: relationship between MRI information and potential aggressive behavior

Min-jie Chen, Chi Yang, Ya-ting Qiu, Qian Jiang, Hui-min Shi, Wen-bin Wei
Journal of Cranio-maxillo-facial Surgery 2015, 43 (3): 349-54

PURPOSE: To evaluate the types of synovial condromatosis (SC) of tempromandibular joint (TMJ) on MRI and their potential aggressive behavior.

METHODS: 144 patients with pure SC of TMJ were included in. On MRI, 3 types of the lesion included loose body, homogeneous mass, and mixture of both loose body and homogeneous mass. Bony evaluations included 4 stages of erosion: without erosion, chondral breakdown, bony absorption and bony perforation.

RESULTS: 47 (32.6%) cases were categorized in the type of loose body, 71 (49.3%) cases in the type of homogeneous mass, and 26 (18.1%) cases in the type of mixture. 80% of bony perforation belonged to the type of homogeneous mass and 20% belonged to the type of mixture. 2 patients were found recurrence.

CONCLUSION: The types of homogeneous mass and mixture of both on MRI were more aggressive. Homogeneous mass with bony erosion on MRI had potential recurrence.

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