Osteosarcomas arise from osteoblasts of different sizes - called pleomorphic - and these cells produce too much osteoid tissue.

肉瘤起源于大小不同的胞（多形性）；这些胞会产生过多的类组织。

To build bone, osteoblasts secrete osteoid, which is an organic matrix made of type 1 collagen.

在构建的过程中，胞分泌类质，它是一由1型胶原组的有机质。

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

在样瘤中，癌巢直径通常小于1.5cm，并且通常被的组织包围（边）。

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，样瘤通常影响长干，例如胫，并且一般不侵蚀周围骼。

Both of these tumors classically form a nidus – which is a disorganized mix of small blood vessels, tiny rods of bone called trabeculae, and unmineralized bony tissue called osteoid.

通常这两肿瘤形癌巢：癌巢是小血管、小棒状（小梁）、未矿（即类质）等无组织的构。

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