| ACA | abnormal coronary artery; acrodermatitis chronica atrophicans; acute cerebellar ataxia; adenocarcino... |
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| RAD | radial artery catheter; radiation absorbed dose; radical; radiography or radiographic; reactive airw... |
| RFA | resident functional atlas; right femoral artery; right frontoanterior [fetal position] |
| RSA | rabbit serum albumin; regular spiking activity; relative specific activity; relative standard accura... |
| RVA | re-entrant ventricular arrhythmia; right ventricle activation; right vertebral artery |
| gastric canal | Furrow formed temporarily between longitudinal rugae of the gastric mucosa along the lesser curvature during swallowing; observed radiographically and endoscopically, it is formed because of the firm attachment of the gastric mucosa to the muscular layer, which is devoid of an oblique layer at this site; said to form a passageway favoured by saliva and small quantities of masticated food and other fluids as they flow from cardia to gastroduodenal junction. Synonym: canalis gastricus, canalis gastrici, magenstrasse. (05 Mar 2000) |
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| gastric cancer | Cancer of the stomach, the major organ that holds food for digestion. Stomach cancer (gastric cancer) can develop in any part of the stomach and spread to other organs. Stomach ulcers do not appear to increase a person's risk of developing stomach cancer. Symptoms of stomach cancer are often vague, such as loss of appetite and weight. The cancer is diagnosed with a biopsy of stomach tissue during a procedure. Called an endoscopy. (12 Dec 1998) |
| gastric carcinoma | <radiology> 3rd most common GI malignancy (after colorectal and pancreas), 95% adenocarcinoma (rarely squamous cell or adenoacanthoma), predisposing factors: pernicious anaemia (2X risk), chronic atrophic gastritis, adenomatous and villous polyp (7-27% are malignant), gastrojejunostomy types: polypoid / fungating, ulcerating / penetrating (70%), infiltrating / scirrous = linitis plastica, increase in fibrous tissue; aperistalsis; rigidity, superficial spreading carcinoma, confined to mucosa/submucosa; 95% 5-year survival, patch of nodularity; little loss of elasticity location: 60% lesser curvature, 30% GE junction, 10% greater curvature probability of malignancy of an ulcer: fundus 90%, greater curvature 70%, lesser curvature 10-15% (12 Dec 1998) |
| gastric cardia | The area of the stomach close to the oesophageal opening (cardiac orifice or cardia) which contains the cardiac glands. Synonym: pars cardiaca gastris, pars cardiaca ventriculi, cardia, gastric cardia. (05 Mar 2000) |
| gastric colic | Colicky pain associated with gastritis or peptic ulcer. (05 Mar 2000) |
| gastric crisis | An attack, usually lasting several days, with severe pain in the abdomen or around the waist, accompanied by nausea and vomiting and occasionally diarrhoea; occurs in tabetic neurosyphilis. (05 Mar 2000) |
| gastric diastole | A phase of relaxation of stomach peristalsis seen fluoroscopically or with the gastroscope. (05 Mar 2000) |
| gastric digestion | That part of digestion, chiefly of the proteins, carried on in the stomach by the enzymes of the gastric juice. Synonym: peptic digestion. (05 Mar 2000) |
| gastric emptying | <radiology> Solids linear (90-min half-time), liquids exponential (faster) (12 Dec 1998) |
| gastric feeding | Giving of nutriment directly into the stomach by means of a tube inserted via the nasopharynx and oesophagus or directly through the abdominal wall. (05 Mar 2000) |
| gastric filling defects | <radiology> Malignant tumours, carcinoma, lymphoma, leiomyosarcoma, metastases, benign, leiomyoma, lipoma, neurofibroma, polyp, hyperplastic, adenomatous, hamartomatous, others, bezoar, Nissen fundoplication, ectopic pancreas (12 Dec 1998) |
| gastric fistula | Abnormal passage communicating with the stomach. (12 Dec 1998) |
| gastric folds | Characteristic folds of the gastric mucosa, especially evident when the stomach is contracted. Synonym: plicae gastricae, gastric folds, ruga gastrica. (05 Mar 2000) |
| gastric follicles | Branched tubular glands lying in the mucosa of the fundus and body of the stomach; such glands contain parietal cells that secrete hydrochloric acid, zymogen cells that produce pepsin, and mucous cells. Synonym: glandulae gastricae, glandulae propriae, fundus glands, gastric follicles, Wasmann's glands. (05 Mar 2000) |
| gastric freezing | Formerly used treatment for peptic ulcer designed to reduce or eliminate the production of acid gastric juice by freezing the secretory cells with a supercooled fluid introduced into a balloon positioned in the stomach. (05 Mar 2000) |