What refers to a hernial protrusion of a saclike cyst of meninges, spinal fluid, and a portion of the spinal cord with its nerves through a defect in the vertebral column?
a. Rachischisis
b. Meningocele
c. Encephalocele
d. Myelomeningocele
ANS: D
A myelomeningocele has a visible defect with an external saclike protrusion, containing meninges, spinal fluid, and nerves. Rachischisis is a fissure in the spinal column that leaves the meninges and the spinal cord exposed. Meningocele is a hernial protrusion of a saclike cyst of meninges with spinal fluid but no neural elements. Encephalocele is a herniation of brain and meninges through a defect in the skull, producing a fluid-filled sac.
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