meninges. plural of meninx; the three membranes covering the brain and spinal cord: the dura mater, arachnoid, and pia mater. adj., adj meninÂ´geal.Meninges of the central nervous system.eninx. Etymology: Gk, meninx, membrane. the three membranes enclosing the brain and the spinal cord, comprising the dura mater, the pia mater, and the arachnoid membrane. The pia mater and the arachnoid can become inflamed by bacterial meningitis, causing serious complications that may be life-threatening.
The exact cause of cholangiocarcinoma is unknown, and most cases occur sporadically, but there are several well-defined risk factors. The most common of these is primary sclerosing cholangitis (PSC). The true incidence of cholangiocarcinoma in the setting of PSC is reported as 8%-40%, depending on the type of study.
1 Primary sclerosing cholangitis is a condition in which inflammation of the bile ducts (cholangitis) leads to the formation of scar tissue (sclerosis). 2  People with this condition have an increased risk of bile duct cancer. 3  The cause of the inflammation is not usually known. The cause of the inflammation is not usually known. 2  Many people with this disease also have inflammation of the large intestine called ulcerative colitis. 3  Bile duct stones, which are similar to, but much smaller than gallstones, can also cause inflammation that increases the risk of bile duct cancer.