Leptomeningeal cancer is a tumor that involves the two innermost meninges (thin layers of tissue that cover and protect the brain and spinal cord). See also Cancer A tumor or tumour is the name for a swelling or lesion formed by an abnormal growth of cells (termed neoplastic The meninges (singular meninx) is the system of membranes which envelops the Central nervous system. The brain is the center of the Nervous system in animals All Vertebrates and the majority of Invertebrates have a brain The spinal cord is a long thin tubular bundle of Nerves that is an extension of the Central nervous system from the brain and is enclosed in and protected
This article includes text from the U. S. National Cancer Institute's public domain Dictionary of Cancer Terms
The National Cancer Institute (NCI is part of the United States Federal government's National Institutes of Health.