Hernial protrusion of a sac-like cyst of meninges filled with spinal fluid is known as __________

Correct option is D

Ans (d)
Sol. Rachischisis: This is a severe form of spina bifida where there is a complete failure of the neural tube to close, resulting in a large open defect along the spine. It is not specifically related to the formation of a sac-like cyst with spinal fluid.
Meningomyelocele: This is a more severe form of spina bifida in which the spinal cord and meninges protrude through an opening in the spine. Unlike meningocele, the spinal cord is involved in meningomyelocele.
Encephalocele: This is a condition where part of the brain protrudes through an opening in the skull, typically at the back of the head. It involves the brain, not the spinal cord or meninges.
Meningocele: Meningocele is a type of spina bifida where the meninges (protective coverings of the spinal cord) protrude through an opening in the spine, forming a sac-like cyst filled with spinal fluid. The spinal cord itself is not usually involved in meningocele.