骨瘤

An osteoblastoma is just a big osteoid osteoma in the vertebra.

成骨细胞恰是椎骨的大骨样骨。

Single cancellous osteomas, unlike exostosis, are a relatively rare lesion in the external auditory canal.

单一性疏松骨，外生骨疣，是一个外耳较少见的病灶。