In osteoid osteomas, the nidi are smaller than 1.5cm in diameter and are often surrounded by a ring of sclerotic bone tissue.

在骨样骨中，癌巢直径于1.5cm，并且被硬化骨组织包围（边硬化）。

Some unique symptoms are that the pain of osteoid osteoma typically gets worse at night, while osteochondromas and osteoblastomas sometimes press against spinal nerves, causing numbness and limb weakness.

一些独特症状如骨样骨痛会在夜间加剧，而骨软骨、成骨细胞有时会压迫脊神经，引起麻木和四肢无力。