Aneurysmal bone cyst of the maxilla--an association with tooth resorption.

The aneurysmal bone cyst is an uncommon lesion of the jaws. Cases involving the maxilla have been reported infrequently. Despite uncertainty as to the aetiology of the aneurysmal bone cyst, it is regarded as a benign lesion. Conservative surgical treatment with regular postoperative follow-up is recommended. The case described here presented with tooth mobility resulting from extensive root resorption. A review of the literature reveals that significant root resorption is not a commonly reported feature of aneurysmal bone cysts. For the present case we interpret the evidence as supporting a diagnosis of idiopathic root resorption complicated by the formation of a aneurysmal bone cyst.