Aneurysmal bone cyst (ABC) is a benign lesion of bone which is uncommon in the craniofacial region.

Aneurysmal bone cyst (ABC) is a benign lesion of bone which is uncommon in the craniofacial region. It is a pseudocyst which is manifested by rapid growth, bony expansion and facial asymmetry. In the present case report we illustrate a case of Aneurysmal bone cyst in a 14 year old female patient affecting the body of the mandible with expansion and thinning of buccal and lingual cortical plates.