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Abstract
A case is described of an osteoid-osteoma in the mandibular condyle, a location not earlier reported. A 48-year-old man had an ankylotic mandibular joint accompanied by arthralgia, symptoms which returned despite treatment. The condyle was therefore amputated and an osteoid-osteoma was found in it. No changes were noticeable in the X-ray.
The literature on osteoid-osteomata, especially with reference to their genesis, is discussed. The pathogenesis of the ankylosis is considered against the background of earlier treatment, and the operative method is described. In conjunction with the histopathological description the possible causes of the cartilaginous lesions in the condyle, their possible relation to the osteoid-osteoma and the differential diagnosis of the osteoid-osteoma are discussed.