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

在骨样骨瘤中，癌巢直径通常小于1.5cm，并且通常被骨组织包围（边）。

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.

一些症状如骨样骨瘤疼痛通常会在夜间加剧，而骨软骨瘤、成骨细胞瘤有时会压迫脊神经，引起麻木和四肢无力。