The procedure was also successful in nine of 10 patients with primary aqueductal stenosis.

The authors present a case of secondary amenorrhea in a 32-year-old woman found to have noncommunicating hydrocephalus due to aqueductal stenosis.

It is also highly successful in patients with primary aqueductal stenosis, even in those with a history of hemorrhage or CSF infection.

The most common causes of hydrocephalus were aqueductal stenosis in 50% of patients and tectal glioma in 25% of patients.