[Sirenomelia--the caudal regression syndrome (author's transl)]

A case of sirenomelia with malformations in lumbar and sacral spine and urogenital system together with fusion of lower limbs is presented. The caryotype of the child was normal 46XY. There were no hereditary diseases or diabetes in the family, though caudal regression syndrome is known to be more frequent with diabetic mothers. No exposures were known.