Webster's New World Medical Dictionary

Gardner syndrome
A variant of familial adeno-
matous polyposis characterized by the combination
of polyps of the colon, tumors in extra-bowel sites
(especially osteomas), and a characteristic abnor-
mality of the retina of the eye. See also 
familial ade-
nomatous polyposis.
Gareis-Mason syndrome
See 
MASA syndrome.
gargoylism
See 
Hurler syndrome.
gas, intestinal
See 
flatulence; flatus.
gas, laughing
See 
nitrous oxide.
gas chromatography
See 
chromatography, gas.
gastrectomy
Surgery to remove part or all of the
stomach.
gastric
Having to do with the stomach.
gastric atrophy
A condition in which the stom-
ach muscles shrink and become weak. Gastric atro-
phy may result in a lack of digestive juices due to
accompanying shrinkage of the digestive glands.
gastric banding
A surgical procedure that con-
verts the upper part of the stomach into a very small
pouch, forcing the patient to eat only tiny portions
yet still feel full. Gastric banding is a type of bariatric
surgery that is normally done only in severe cases of
obesity. The operation is sometimes called gastric
stapling, and inflatable bands and/or staples may be
used to create the stomach pouch. See also
bariatric surgery.
gastric bypass
A type of bariatric surgery that
involves stapling or banding techniques to reduce
the stomach to a small pouch and connecting the
new, smaller stomach directly to the middle portion
of the small intestine, thereby bypassing the remain-
der of the stomach and a portion of the small intes-
tine. The procedure is performed to treat severe
cases of obesity. See also 
bariatric surgery.