胼胝体发育不全较为少见，我院发现１例，现报告如下：１病例报告患者，男性，９岁，因头颅外伤来我院就诊，头颅ＣＴ发现：两侧脑室前角呈“八”字分离，侧脑室体部内侧壁向外呈弓形外突，侧脑室后角和体后部相对增宽，第三脑室扩大上移插入两侧脑室体部之间，枕大池蛛网... The corpus callosum hypoplasia is relatively rare, found in our hospital in 1 case, are as follows: 1 case report patients, male, 9 years old, due to head trauma to our hospital, head CT found: both sides of the anterior chamber of the brain showed “eight” word separation, Side of the lateral ventricle body medial wall was arcuate outward, the posterior horn of the lateral ventricle and the body is relatively widened, the third ventricle enlarged up into the body inserted between the two sides of the brain, pillow cobweb ...