Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «N»:
Neuraminidase inhibitor: A drug that inhibits the enzyme called neuraminidase.
For example, oseltamivir (Tamiflu), an antiinfluenza agent, acts by inhibiting the neuraminidase enzyme on the surface of the influenza virus. This prevents the virus from leaving the cell and spreading to others....
Neurectomy: The removal of part or all of a nerve....
Neurinoma, acoustic: A benign tumor that may develop on the hearing and balance nerves near the inner ear. The tumor results from an overproduction of Schwann cells -- small sheet-like cells that normally wrap around nerve fibers like onion skin and help support the nerves. When growth is abnormally...
Neuritis: Inflammation of nerves. ...
Neurobiological disorder: An
illness of the nervous system caused by genetic, metabolic, or other biological factors. Many illnesses categorized as psychiatric disorders are neurobiological, including autism, bipolar disorders, obsessive-compulsive
disorders, schizophrenia, and Tourette syndrome....
Neuroblastoma: A leading childhood form of cancer that arises in the adrenal gland or in tissue in the nervous system that is related to the adrenal gland. Neuroblastoma is the most common solid tumor outside the brain in infants and children. It is often present at birth but usually is not detec...
Neurocysticercosis: Infection of the brain by the larval form of the pork tapeworm Taenia solium. Neurocysticercosis is a form of cysticercosis and is the most common worm infection of the central nervous system. The disease is most prevalent in developing countries, in which it can be a serious pub...
Neurodegeneration with brain iron accumulation
Neurodegeneration with brain iron accumulation: See: Hallervorden-Spatz disease....
Neurodermatitis: Scaly patches of skin on the head, lower legs, wrists, or forearms caused by a localized itch such as from an insect bite that becomes intensely irritated when scratched....
Neuroendocrine: Having to do with neuroendocrinology: the interactions between the nervous system and the endocrine system.
Neuroendocrine cancer of the skin
Neuroendocrine cancer of the skin: Also called Merkel cell carcinoma. An uncommon but highly malignant skin tumor that characteristically starts in a sun-exposed area in a lightskinned person over 60 as a firm painless shiny lump that can be red, pink, or blue and range in size from less than a quar...
Neuroendocrinology: Having to do with the interactions between the nervous system and the endocrine system.
In the human body, two systems control all physiologic processes. One of these systems is neurologic while the other is endocrine. The nervous system exerts point-to-point control through ne...
Neuroepithelial: Having to do with tissue made up of sensory cells that serve in the reception of external stimuli. Neuroepithelial tissue is found in the ear, nose, and tongue....
Neurofibromatosis: A genetic disorder of the nervous system that primarily affects the development and growth of neural (nerve) cell tissues, causes tumors to grow on nerves, and may produce other abnormalities.
Neurofibromatosis (NF) consists of two very different disorders: neurofibromatosis typ...
Neurofibromatosis type 1
Neurofibromatosis type 1: NF1, a genetic disorder characterized by a number of remarkable skin findings including multiple cafe au lait (coffee with milk) spots, multiple benign tumors called neurofibromas on the skin, plexiform neurofibromas (thick and misshapen nerves due to the abnormal growth of...