This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
On a routine radiographic exam, a well-defined radiolucent lesion was seen in the body of the mandible of a 17-year-old boy. At the time of operation, it proved to be an empty cavity. This is a(an) _____. 
Select and explain. 
A. Osteoporotic bone marrow, B. Aneurysmal bone cyst, C. Odontogenic keratocyst, D. Traumatic bone cyst
D: Traumatic bone cyst
Answer: D: Traumatic bone cyst 
Explanation: Traumatic bone cysts characteristically occur in the body of the mandible of teenagers. They are pseudocysts in that they have no epithelial lining. They are empty cavities.