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

其他良性肿瘤包括成骨细胞瘤、骨样骨瘤，两者均起源于成骨细胞。

Osteoblastomas also tend to affect the bones of the axial skeleton, usually the mandible, and erode the surrounding bone.

成骨细胞瘤往往影响中轴骨，通常是下颌骨，并侵蚀周围骨骼。

In osteoblastomas, the nidi - which is plural for nidus - are large with a diameter of over 1.5 cm.

在成骨细胞瘤中，癌巢直径通常大于1.5cm。

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.

一些独特的症状如骨样骨瘤的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。