Intra-articular loose osteochondroma of the temporomandibular joint

Osteochondroma or osteocartilaginous exostosis is one of the most common benign bone tumours. It usually develops in the metaphyses of long flat bones, but rarely occurs in the oral and maxillofacial area, where it is generally associated with the coronoid process or the condyle. Loose osteochondromas inside the joint are generally a rare pathology usually described in large joints. The authors present a case of an intra-articular loose osteochondroma of the temporomandibular joint (TMJ), which represents the first case of such a pathological entity in the literature. The authors suggest that it should be considered in any differential diagnosis of loose bodies described in the TMJ.