[Anterior sacral meningocele. Report on 2 cases treated by the abdominal approach].

Anterior sacral meningocele is a rare affection (150 cases published) that is frequently misdiagnosed with resulting inappropriate, always dangerous treatment. Diagnosis should however be simple to establish on the finding of a fluid hypogastric mass attached to the sacrum with associated radiologic anomalies of the sacrum. Two cases are reviewed and diagnostic and surgical therapy features discussed.