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Temporomandibular joints (TMJ)
Region of interest
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1. Synovial chondromatosis in right TMJ
Multiple small calcifications are dispersed throughout the joint space in the right temporomandibular joint. In the closed positions, these calcifications are distributed around the anterior, medial and posterior aspects of the condylar head. These calcifications have corticated peripheries, and lower internal densities. The size, distribution and shape of these entities are characteristic of synovial chondromatosis.
Normal position of right TMJ in mandibular open position
In the mandibular open position, the right condylar head translates to the crest of the articular eminence. All of the calcifications within the joint space have changed position.
Normal left TMJ in the mandibular closed position
In the mandibular closed position, the left condylar head is centrally positioned in the glenoid fossa, and appears normal radiographically. No signs of pathology are present.
Normal left TMJ in mandibular open position
In the mandibular open position, the left condylar head is positioned at the crest of the articular eminence. This is normal.
2. Calcified right stylohyoid ligament
The right stylohyoid ligament is partially calcified. This is a non-significant incidental finding.