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

其他良性肿瘤包细胞瘤、样瘤，两者均起源于细胞。

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

在细胞瘤中，癌巢直径通常大于1.5cm。

3.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.

一的症状如样瘤的疼痛通常会在夜间加剧，而软瘤、细胞瘤有时会压迫脊神经，引起麻木和四肢无力。