第四脑室中、侧孔先天性闭塞１例报告杨义军王晓轩杨思福患儿男，５岁。生后发现枕部小囊状突起，随后日渐增大。体检：头颅明显扩大，颅面比例不相称，头围达７４ｃｍ，枕部膨隆更明显，可触及一约９ｃｍ×１１ｃｍ囊状肿物。胸腹部及四肢无异常。智力尚可。Ｘ线平片（图... Fourth ventricle, side hole congenital occlusion in 1 case Report Yang Yijun Wang Xiaoxuan Yang Sifu Children, 5 years old. After birth, it was found that the occipital cystic processes increased with each passing day. Physical examination: the head was significantly expanded, the proportion of craniofacial disproportionate head circumference of 74cm, occipital bulging more obvious, can reach about 9cm × 11cm cystic mass. No abnormal chest and abdomen and limbs. Intelligence is acceptable. X-ray film (Figure ...