Rational management of perinatal hydrocephalus.

Hydrocephalus of prenatal origin, which may be hereditary, is likely to be discovered more frequently and earlier in gestation with ultrasonic diagnosis. It is suggested that each case be analyzed according to a protocol which includes a full obstetric evaluation, complete genetic pedigree, determination of familial cranial size, and complete neuropathologic study. Destruction of the aqueductal area may deprive the investigator of much of the information needed for the thorough study of the case which is vital to counsel the parents concerning future pregnancies.