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

成骨细胞中，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.

一些独状如骨样骨疼痛通常间加剧，而骨软骨、成骨细胞有时压迫脊神经，引起麻木和四肢无力。

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

其他良性肿包括成骨细胞、骨样骨，两者均起源于成骨细胞。