NCIt definition : Diffuse spread of cancer to the meninges.;
Alternative definition : NCI-GLOSS: A serious problem that may occur in cancer in which cancer cells spread
from the original (primary) tumor to the meninges (thin layers of tissue that cover
and protect the brain and spinal cord). It can happen in many types of cancer, but
is the most common in melanoma, breast, lung, and gastrointestinal cancer. The cancer
may cause the meninges to be inflamed.;