Retained medullary cord with sacral subcutaneous meningocele and congenital dermal sinus

A retained medullary cord (RMC) is a rare closed spinal dysraphism with a robust elongated cord-like structure extending continuously from the conus medullaris to the dural cul-de-sac that is caused by late arrest of secondary neurulation. Five patients with RMC extending to an associated sacral subcutaneous meningocele have been reported. We report an additional patient with RMC, in whom a congenital dermal sinus (CDS) was found in the caudal...