The above reference is so wrong about what a pseudomeningocele is. It is a n. and it is a word, but the reference is from the 1800's??
n. A pseudomeningocele is an abnormal collection of cerebrospinal fluid (CSF) that communicates with the CSF space around the brain or spinal cord. In contrast to a meningocele, in which the fluid is surrounded and confined by dura mater, in a pseudomeningocele, the fluid has no surrounding membrane but is contained in a cavity within the soft tissues.
Pseudomeningocele may result after brain surgery, spine surgery, or brachial plexus avulsion injury.Encyclo MMXII