Spina bifida cystica with congenital dermal sinusの2例

Two Cases of Spina Bifida Cystica with Congenital Dermal Sinus

Ⅰ．緒言

　先天異常のうち，中枢神経系の奇形には，数多くのものがあるが，このなかで，日常，最もよくみられるのがdysraphic states^4）と，よばれるものである．

　これには，spina bifida, cranium bifidum, syringornyelia, hydromyelia, congenital dennal sinus, ArnoldChiari malformation, Dandy-Walker syndrome, Klippel-Feil syndromeなどがある^11）．

Spina bifida cystica and congenital dermal sinus are congenital anomalies which are called dysraphic states. Numerous reports of congenital dermal sinus can he seen in Europe and America, but in this country we have been able to find no more than six reported cases.

Also in this country, to the best of our knowledge, only two cases of combined spina bifida cystica and congenital dermal sinus have been seen.

The small incidence of reported cases may be clue to the fact that congenital dermal sinus tends to go unnoticed except when infection develops.