Thecoperitoneal shunt in case of symptomatic anterior sacral meningocele.

as a result of endodermal ectodermal adhesions or as a result of abnormal separation of the germ cell layer in early embryological life. Neurenteric cysts may also be associated with anterior or posterior spina bifida, widened vertebral bodies, fused vertebrae, hemivertebrae and diastomatomyelia. These cysts have been described by various names, including enteric cysts, enterogenous and archenteric cysts. The review by Agnoli et al of 33 histologically verified enterogenous intraspinal cysts, showed that 18 were located in the cervicodorsal spine, 80% were intradural extramedullary and 12% were intramedullary cysts. The cysts can mimic arachnoid, epidermoid and teratomatous cysts. The content of these neurenteric cysts are known to be irritative to neural tissue which results in adhesions and subsequent attempts at excision become more difficult. The risk of recurrence in intracranial enterogenous cysts has been reported to be 37% However there have been only isolated reports regarding recurrence in intra spinal cysts after partial excision. In light microscopic analysis, the epithelium varies from a ciliated columnar lining to a typical gastric or small intestinal lining i.e. single pseudostratified columnar epithelium with or without muscularis mucosa and a smooth muscle layer. There may be goblet cells. The entergenous cysts lack the serosal layer. The cyst fluid can be mucoid, black, brown, chocolate, yellowish or occasionally colorless. Neurentric cysts, which are present ventral to cord, are not associated with vertebral anomaly. This is said to be due to notochord splitting or allowing endoderm to herniate into spinal canal. Subsequently the split notochord reunites giving rise to normal vertebrae.