Anterior sacral meningocele
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. They protrude into retroperitoneal and presacral space. 1) 2).
The wall of the sac consists of two layers, an inner arachnoid membrane and outer dura mater, which extends into the retroperitoneal presacral space from the sacral spinal canal 3).
Anterior sacral meningocele was first described in 1837 as a part of neural tube defect (NTD) spectrum.
It may be associated with a syndrome like Currarino syndrome 4) which includes anorectal malformations, sacral bony defect and presacral mass; and Marfan syndrome wherein the etiology may be disorder of collagen biosynthesis and structure at the dural level 5).
Anterior sacral meningocele in Marfan syndrome
Associated malformations are found: