Radiology Terminology

Deciphering Radiology One Term at a Time

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
There are 20 names in this directory beginning with the letter L.
laceration
A torn wound or cut.
laparoscope
A thin, tube-like instrument with an attached light and a lens for viewing the inside of the abdominal cavity.
laparotomy
In this exploratory procedure, the surgeon makes a large incision in the abdomen and investigates the internal organs to help determine the cause and extent of a disease.
laser
A device emitting intense, focused light energy that can destroy tissues as an alternative to conventional surgical removal.
lateral view
A visual perspective from the side.
laxative
1. Mildly cathartic; having the action of loosening the bowels. 2. A mild cathartic; a remedy that moves the bowels slightly without pain or violent action.
leiomyoma
A benign tumor derived from smooth muscle. In the uterus, commonly called a fibroid.
lesion
An area of abnormal tissue on the skin or within the body caused by injury or disease. A lesion may be benign (noncancerous) or malignant (cancerous).
leukemia
Cancer of the blood cells that starts in the bone marrow, the soft tissue inside most bones.
lithotripsy
The crushing of a stone in the renal pelvis, ureter, or bladder, by mechanical force or sound waves.
liver
The largest gland of the body, lying beneath the diaphragm; it is of irregular shape and weighs from 1 to 2 kg (2 to 4 pounds). It secretes the bile and is also of great importance in both carbohydrate and protein metabolism.
lobules
Glands that make breast milk.
local anesthetic
Also called numbing agent. A medication used to produce a temporary loss of sensation in a specific area of the body during a surgical or other medical procedure; It may be administered as an injection under the skin, applied as a topical cream or a patch to the surface of the skin.
localization
1. Limitation to a definite area. 2. The reference of a sensation to its point of origin. 3. The determination of the location of a tumor, disease or other morbid process.
lumen, pl. lumina, lumens
The space in the interior of a tubular structure, such as an artery or the intestine.
lumpectomy
The surgical removal of a small tumor (a lump). Lumpectomy generally refers to the removal of a lump from the breast as an alternative to mastectomy, which is the removal of the entire breast including the lump.
lung
One of a pair of organs of respiration in the chest in which aeration of the blood takes place. As a rule, the right lung is slightly larger than the left and is divided into three lobes (an upper, a middle, and a lower), while the left has but two lobes (an upper and a lower). Each lung is irregularly conical in shape, presenting a blunt upper extremity (the apex), a concave base following the curve of the diaphragm, an outer convex surface following the inner curve of the ribs, an inner or mediastinal surface, a thin and sharp anterior border, and a thick and rounded posterior border.
lung volume reduction surgery
The removal of part of the damaged lung, which creates additional space for the remaining healthy lung tissue to expand more easily. This surgery is only used for those with severe emphysema.
lymph
A clear, transparent, sometimes faintly yellow and slightly opalescent fluid that is collected from the tissues throughout the body, flows in the lymphatic vessels (through the lymph nodes), and is eventually added to the venous blood circulation. Lymph consists of a clear liquid portion, varying numbers of white blood cells (chiefly lymphocytes), and a few red blood cells.
lymph nodes
Small structures throughout the body that filter lymph fluid and collect inflammatory cells in order to keep them from spreading infection.