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

其他良性肿包括成细胞、样，均起源于成细胞。

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

在成细胞中，癌巢常大于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.

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