Maxillofacial Osteoid Osteoma

**Semantic type:** Neoplastic Process

**Definition:** A small benign bone-forming neoplasm arising from a maxillofacial bone and is characterized by the presence of a central portion (nidus) containing differentiated osteoblasts that produce osteoid and sometimes bone. The lesion is usually surrounded by hypervascular sclerotic bone and has limited growth potential.