Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «L»:
Lumbar radiculopathy: Nerve irritation caused by damage to the discs between the vertebrae. Damage to the disc occurs because of degeneration ("wear and tear") of the outer ring of the disc, traumatic injury, or both. As a result, the central softer portion of the disc can rupture (herniate) through...
Lumbar spinal stenosis
Lumbar spinal stenosis: A condition whereby either the spinal canal (central stenosis) or vertebral foramen (foraminal stenosis) becomes narrowed, leading to compression of the spinal nerves. Symptoms are pain in the lower back and
weakness, numbness, pain, and loss of sensation in the legs. The mo...
Lumbar strain: A stretching injury to the ligaments, tendons, and/or muscles of the low back. The stretching incident results in microscopic tears of varying degrees in these tissues. Lumbar strain is one of the most common causes of low back pain. The injury can occur because of overuse, improper u...
Lumbar vertebrae: There are 5 lumbar vertebrae. The lumbar vertebrae are situated between the thoracic vertebrae and the sacral vertebrae in the spinal column. The 5 lumbar vertebrae are represented by the symbols L1 through L5....
Lumen: A luminous term referring to the channel within a tube such as a blood vessel or to the cavity within a hollow organ such as the intestine. Lumen is a luminous term because it is Latin for light, including the light that comes through a window. When a hollow organ is cut across, you can see l...
Lumpectomy: The surgical removal of a small tumor (a lump)
which may or may not be benign (or malignant). Lumpectomy has come to
refer specially to the removal of a lump from the breast.
The word "lumpectomy" is a hybrid term. "Lump" is of Middle
English origin while "-ectomy" comes from two ...
Lung cancer, familial
Lung cancer, familial: Lung cancer that recurs in families. Lung cancer can occur sporadically in people with no known family history of lung cancer or it can recur in two or more members of the same family and constitute familial lung cancer.
A gene for familial lung cancer is on the long (q) arm ...
Lung cancer, non-small cell
Lung cancer, non-small cell: Cancer of the lung which is not of the small cell carcinoma (oat cell carcinoma) type. The term "non-small cell lung cancer" is generally applied to the various types of bronchogenic carcinomas (those arising from the lining of the bronchi) which include adenocarcinoma, ...
Lung cancer, oat cell
Lung cancer, oat cell: See: Oat cell cancer....
Lung cancer, small cell
Lung cancer, small cell: A type of lung cancer in which the cells are small and round. Also called oat cell lung cancer....
Lung reduction surgery
Lung reduction surgery: A surgical treatment for patients with advanced emphysema in which 20-35% of the emphysematous lung is removed to allow the remaining tissue to expand more fully and restore some of the patient's breathing capacity. Also called lung-volume reduction surgery, or LVRS.
Lung transplant: The first lung
transplant was done by
the American surgeon James Hardy
(1918-) in 1964. ...
Lung volume reduction surgery
Lung volume reduction surgery: See: Lung reduction surgery....
Lung, and Blood Institute, National Heart,
Lung, and Blood
Institute, National Heart, (NHLBI): One of the National Institutes of
Health in the U.S., the NHLBI's mission is to "provide
leadership for a national research program in diseases of
the heart, blood vessels, lungs, and blood and in
transfusion medicine through support of inn...
Failure of full expansion of a once fully expanded
lung. Medically called atelectasis. The word comes from
the Greek "a-" (without) "telos" (complete) + "rectasis"
(expansion) = without complete expansion....