Dictionary

ulcer, gastric An ulcer in the lining of the stomach that is corroded by the acidic digestive juices secreted by the stomach cells. See also ulcer; ulcer, peptic.

ulcer, peptic An ulcer in the lining of the stomach, duodenum, or esophagus. Peptic ulcers affect millions of people in the US yearly. Ulcer formation is related to Helicobacter pylori bacteria in the stomach, use of anti-inflammatory medications, and cigarette smoking. Peptic ulcer pain may not correlate with the presence or severity of ulceration. Complications…

ulcer, stasis A skin ulcer that develops in an area in which the circulation is sluggish and the return of venous blood toward the heart is poor. A common location for stasis ulcers is on the ankles. Stasis refers to a stoppage or slowdown in the flow of blood (or other body fluid, such as…

ulcer bug See Helicobacter pylori.

ulceration The process or fact of being eroded away, as by an ulcer.

tympanometry A test that measures the function of the middle ear. Tympanometry works by varying the pressure within the ear canal and measuring the movement of the eardrum (tympanic membrane).

tympanoplasty A surgical operation to correct damage to the middle ear and restore the integrity of the eardrum.

tympanostomy tube See ear tube.

tympanum The cavity of the middle ear, which is separated from the outer ear by the eardrum.

tympany A hollow drum-like sound that is produced when a gas-containing cavity is tapped sharply. Tympany is heard if the chest contains free air (pneumothorax) or the abdomen is distended with gas. Also known as tympanites.

type I error See alpha error.

type 1 GM2-gangliosidosis See Tay-Sachs disease.