Mandibular Aneurysmal Bone Cyst: About One Case

Abstract

: Aneurysmal bone cyst (ABC) is a benign multilocular expansive osteolytic pseudotumor with hematic content whose etiopathogeny is very controversial and whose histopathological diagnosis is sometimes difficult. The case of a 34 year old patient is reported, with no previous history, consulted for a right the mandibular angle and ramus swelling increasing in size, progressively hard, painless, cold, an orthopantomogram was performed in our patient completed by a facial CT scan in coronal and 3D axial sections. In view of our strong suspicion of aneurysmal cyst, we performed a fine needle puncture under general anesthesia before any operative gesture, which brought back a pure hematic liquid. We scheduled our patient for radical surgery: interrupting hemimandibulectomy of the horizontal branch at the right mandibular angle, with immediate reconstruction by maxiplate given the extent of the tumor. Aneurysmal bone cyst was described in 1940 by Ewing and individualized by Jaffe and Lichtenstein (1942) who gave it their names. Clinically, the painless facial swelling, predominantly mandibular, is the main symptom and responsible for facial asymmetry. The paraclinical examinations requested are mainly orthopantomogram and facial CT scan. The treatment of ABC is exclusively surgical, either conservative or radical. The positive diagnosis of aneurysmal cyst is brought by imaging and the confirmation is anatomopathological. Regular clinical and laboratory follow-up is required to detect any recurrence. Many minimally invasive treatments