Method 9 cases of cholesteatoma manifested by MRI and CT, among them, 8 cases located ventral side of brain stem, 1 case in left side of brain stem.
方法经磁共振成像（MRI）和计算机 体层 摄影（CT）及手术证实 的胆脂瘤9例，位于脑干腹侧面8例，脑干左侧1例。
During early proembryo stage, the dorsiventrality appears in the proper of the embryo. On the ventral side, the cells are small with dense cytoplasm and few vacuoles.
原胚初期胚体出现背腹极性，腹面的细胞小，细胞质稠密，液泡较少；
The lower part (20) comprises a ventral side surface (21), a dorsal side surface (22), two lateral side surfaces (23, 24), a lower apposition surface (25) and an upper surface (26).
下面的部分（20）具有一个前侧的侧面（21）、一个背侧的侧面（22）、两个侧向的侧面（23、24）、一个下面的对合表面（25）和一个上面的表面（26）；
应用推荐