ICD-11 definition : A condition caused by failure of the neural tube to close completely during fetal
development. The condition is characterized by skin covered lumbosacral masses, an
arachnoid lined meningocele that is directly continuous with the spinal subarachnoid
space, and a low lying hydromyelic spinal cord that traverses the meningocele and
expands into a large terminal cyst. This condition can present with neural damage
and consequent impairment of function below the site of the myelocystocele.;
A condition caused by failure of the neural tube to close completely during fetal
development. The condition is characterized by skin covered lumbosacral masses, an
arachnoid lined meningocele that is directly continuous with the spinal subarachnoid
space, and a low lying hydromyelic spinal cord that traverses the meningocele and
expands into a large terminal cyst. This condition can present with neural damage
and consequent impairment of function below the site of the myelocystocele.