Other benign tumors are osteoblastomas and osteoid osteomas, both of which arise from osteoblasts.

其他良性肿包括成细胞、，两者均起源于成细胞。

In comparison, osteoid osteomas typically affect the diaphysis of long bones like the tibia, and don't usually erode the surrounding bone.

相比之下，通常影响干，例如胫，并且一般不侵蚀周围骼。

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

在中，径通常小于1.5cm，并且通常被硬化的组织包围（边缘硬化）。

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.

一些独特的症状如的疼痛通常会在夜间加剧，而软、成细胞有时会压迫脊神经，引起麻木和四肢无力。