By microscopy, they are usually mucinous adenocarcinomas, with the heterotopic bone consisting of osteoblasts surrounding irregularly deposited osteoid.
By microscopy, they are usually mucinous adenocarcinomas, with the heterotopic bone consisting of osteoblasts surrounding irregularly deposited osteoid.
这一句，要强调成骨细胞围绕不规则沉积的类骨质排列。