72% Bone marrow cavity 8% Metastatic tumor 7% Extraction socket 6% Surgical defect 2% Simple (traumatic, solitary) bone cyst 1% Leukemia 1% Keratocystic odontogenic tumor (odontogenic keratocyst) mandible 1% Plasmacytoma 1% Langerhans cell histiocytosis (Eosinophilic granuloma) 1% Osteoradionecrosis Total percent is 97.61%