Anterior sacral meningocele classification

• Sacral Agenesis
• Posterior Surgical Ligation and Cyst Decompression -via Needle Puncture- of a Large Anterior Sacral Pelvic Meningocele Through Posterior Sacral Laminectomy
• Intrasacral meningoceles: Clinical presentation, surgical management, and postoperative outcome: The Giannina Gaslini Hospital's experience
• Spinal Dysraphisms: A New Anatomical-Clinicoradiological Classification
• Anterior Sacral Meningocele: A New Classification and Treatment Using the Dorsal Transsacral Approach
• Sirenomelia and severe caudal regression syndrome
• Lumbosacral transitional vertebrae: association with low back pain
• Nerve root prolapse into a spinal arachnoid cyst--an unusual cause of radiculopathy

see also Spinal meningeal cyst classification.

(A) Type I, caudal type: the herniated sac is extending from the defect of the caudal sacrum. The last sacral nerves may be located above the pedicle of communication. (B) Type II, para-neural type: the meningocele is herniating into the pelvic cavity via enlarged anterior sacral foramina without nerves being involved; however, the meningocele could compress the nerves. (C) Type III, Nerve-root Type: The ostium is larger or more extensive, is formed by several sacral foramina, and the sacral nerves are involved and transverse in the sac. Furthermore, only one capsuled nerve root is rare in this type ¹⁾.