A baby with myelomeningocele will have a fluid-filled sac on their mid- to low-back along their spine. Healthcare providers can usually detect myelomeningocele during pregnancy with an ultrasound. Other congenital conditions may also be present in an infant with myelomeningocele. Eight out of 10 infants with myelomeningocele have hydrocephalus (fluid buildup in their brain). Other issues with the spinal cord or musculoskeletal system that are associated with myelomeningocele include: Syringomyelia (a fluid-filled cyst within the spinal cord). Hip dislocation.