A case of aneurysmal bone cyst of the mandible

The aneurysmal bone cyst is an uncommon bone lesion in the jaws. This lesion is a solitary cystic lesion of bone and was first described as a distinct clinicopathologic entity by Jeffe and Lichtenstein in 1942.We experienced a case of aneurysmal bone cyst of the right mandible in an 11-year-old girl. In April, 1983 she received a blood transfusion to treat a massive hemorrhage that arose from the gingiva at 7 of the mandible. Her course of recovery was without incident and no abnormal bleeding was seen. On April, 1984 she was admitted to The Dental Department of The Hakodate Municipal Hospital because of massive hemorrhage of the gingiva of Ti of the mandible. Roentogenography findings revealed a pear sharped radiolucent area between roots 6 and 7. Angiographical findings showed a coincidence with this roentogenography image and aggregation of contrast medium. We suspected the lesion of blood vessels, and embolization of the maxillary artery was conducted using gelform, but haemostasis was not obtained. After ligation of the right external carotid artery, fenestration of the 7-4 buccal cortid bone of the mandible was conducted.The lesion extended widely from 76 alveolar crest to the diaphysis of the mandible, and a bone cavity of the little finger in size wase found at this site, a large artery branching from the inferior alveolar artery was seen. The extraction of 76 and curettage of the affected site was conducted. On August 3 rd she was admitted to Higashi-Nippon-Gakuen University Hospital for detailed examination and treatment.Roentogenography findings of the 5 site showed a multiloculer radiolucent area of the mesial bone of the mandible. The radiolucent of the roentogenography coincided with the angiographic image of the left externar carotid artery. On August 10, a marginal resection of the mandible was conducted, and the histopathologic findings revealed an cvidence which led to the diagnosis of anrurysmal bone cyst.At present alter a two year lapse nn signs of recuriance wrre seen.