骨瘤

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

成细胞瘤恰是椎上的大瘤。

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

单一性疏松瘤，不像外生疣，是一个外耳较少见的病灶。