Spina bifida and so-called asplenia syndrome occurring separately in sibs.

Attention is drawn to the possibility that neural-tube defects may sometimes be associated with the so-called asplenia syndrome (Ivemark syndrome). This hypothesis is based upon a family in which one child had spina bifida and hydrocephaly and another had cardiovascular and other fissural anomalies, similar to Ivemark syndrome. The family history, moreover, revealed several cases of anencephaly and/or spina bifida, both on the paternal and maternal sides.