Anterior sacral meningocele. A presentation of three cases.

Anterior sacral meningoceles are congenital lesions that consist of a spinal fluid-filled sac in the pelvis communicating by a small neck with the spinal subarachnoid space through a defect in the sacrum. The three patients with this disorder presented here had characteristic symptoms snd physical findings: chronic constipation, a pelvic mass, and almost unmistakable roentgenographic changes, but diagnosis was delayed from 11 months to 21 years in all three. After prolonged and complicated treatment, the primary lesions have been surgically eradicated and function is generally satisfactory.