In spina bifida meningocele, which anatomical condition describes it?

• A. Vertebrae do not completely enclose spinal cord, CSF exits through opening, but no nerves
• B. Spinal cord is fully enclosed
• C. There is complete absence of CSF
• D. There is nerve damage but CSF remains within

Answer: (A)

In this condition, the bones of the spine don’t fuse along the back, creating a gap in the vertebral arch. The meninges and cerebrospinal fluid herniate through that gap, forming a sac on the back. Importantly, the spinal cord itself stays inside the spinal canal, so there are no nerves within the sac. That combination—a vertebral defect with a CSF-and-meninges sac, but no neural tissue in the sac—best describes spina bifida meningocele.

The other ideas don’t fit as well: the spinal cord being fully enclosed would describe normal anatomy or a different condition; complete absence of CSF isn’t the case because CSF is contained in the meningocele sac; and nerve tissue in the sac would be more consistent with a meningo myelocele rather than a pure meningocele.