Occurs in the vertebrae or femur or tibia or arm bones (especially in young adults)

• Benign tumor of bone and fibrous tissue

Wiktionary Word definitions in Wiktionary
n. (context oncology English) an uncommon osteoid tissue-forming primary neoplasm of the bone

Wikipedia Word definitions in Wikipedia
Osteoblastoma is an uncommon osteoid tissue-forming primary neoplasm of the bone. It has clinical and histologic manifestations similar to those of osteoid osteoma; therefore, some consider the two tumors to be variants of the same disease, with osteoblastoma ...

WordNet Word definitions in WordNet
n. benign tumor of bone and fibrous tissue; occurs in the vertebrae or femur or tibia or arm bones (especially in young adults)