Tanaka A, Matsumoto N, Fukushima T, Tomonaga M
Neurosurgery. 1986 Apr;18(4):499-501. doi: 10.1227/00006123-198604000-00024.
Two cases of pneumocephalus after ventriculoperitoneal shunt placement in patients with posterior fossa tumors were reported. In each instance, air entered the ventricles through a porencephalic cavity in the temporal lobe that communicated with the mastoid air cells. Thinning of the petrous bone may occur secondary to chronic hydrocephalus or congenital factors. The decrease of intracranial pressure after a shunt might play a role in causing pneumocephalus. The early discovery of the site of air entrance by computed tomographic scan and the direct repair of the bone and dural defect should be mandatory.
报告了两例后颅窝肿瘤患者在脑室腹腔分流术后发生气颅的病例。在每个病例中，空气通过颞叶的脑穿通腔进入脑室，该腔与乳突气房相通。岩骨变薄可能继发于慢性脑积水或先天性因素。分流术后颅内压降低可能在气颅的发生中起作用。通过计算机断层扫描早期发现空气进入部位并直接修复骨和硬膜缺损是必要的。
