| OHI | Occupational Health Institute; operative hypertension indicator; oral hygiene index; Oral Hygiene In... |
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| AC | abdominal circumference; abdominal compression; absorption coefficient; abuse case; acetate; acetylc... |
| ACR | abnormally contracting region; absolute catabolic rate; acriflavine; adenomatosis of colon and rectu... |
| CR | calculation rate; calculus removed; calorie-restricted; cardiac rehabilitation; cardiac resuscitatio... |
| CRS | Carroll rating scale for depression; catheter-related sepsis; caudal regression syndrome; cervical s... |
| colon bacillus | <bacteria> The archetypal bacterium for biochemists, used very extensively in experimental work. A rod shaped gram-negative bacillus (0.5 x 3-5 m) abundant in the large intestine (colon) of mammals. Abbreviation: E. Coli (18 Nov 1997) |
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| colon cancer | <oncology> A malignancy that arises from the lining of either the colon or the rectum. Cancers of the large intestine are the second most common form of cancer found in males and females. Symptoms include rectal bleeding, occult blood in stools, bowel obstruction and weight loss. Treatment is based largely on the extent of cancer penetration into the intestinal wall. Surgical cures are possible if the malignancy is confined to the intestine. Risk can be reduced when following a diet which is low in fat and high in fibre. (27 Sep 1997) |
| colon cancer and polyps | Benign tumours of the large intestine are called polyps. Malignant tumours of the large intestine are called cancers. Benign polyps do not invade nearby tissue or spread to other parts of the body. Benign polyps can be easily removed during colonoscopy, and are not life threatening. If benign polyps are not removed from the large intestine, they can become malignant (cancerous) over time. most of the cancers of the large intestine are believed to have developed from polyps. (12 Dec 1998) |
| colon cancer, family history of | Colorectal cancer can run in families. The colon cancer risk is higher if an immediate (first-degree) family member (parents, siblings or children) had colorectal cancer and even higher if more than one such relative had colorectal cancer or if a family member developed the cancer at young age (younger than 55 years). Under any of these circumstances, individuals are recommended to undergo a colonoscopy every three years starting at an age that is 7-10 years younger than when the youngest family member with the cancer wasdiagnosed. For example, if a parent had colon cancer diagnosed at age 50, colonoscopy should start in that person's children at 40-43 years of age. (12 Dec 1998) |
| colon carcinoma | <radiology> Risk factors: colonic adenoma, 93% of colorectal CA arises from adenomatous polyps, 5% of adenomas 5mm in size develop into carcinoma, family history and polyposis syndromes, chronic ulcerative colitis, prominent lymphoid follicular pattern, history of endometrial and breast carcinoma, metastasis: liver (25%); retroperitoneal/mesenteric nodes (15%); hydronephrosis (13%); adrenal (10%); ovary; psoas muscle; ascites, risk of: 1% for synchronous colon carcinoma, 3% for metachronous colon CA, 3.8% for extracolonic malignancy, Dukes A: bowel wall; B: serosa/mesentery; C: lymph nodes; D: metastasis (12 Dec 1998) |
| colon cutoff sign | Radiographic sign of (usually) inflammatory disease preventing distention of the distal transverse colon. (05 Mar 2000) |
| colon descendens | The fourth portion of the large intestine (colon) that communicates with the transverse colon in the left-upper quadrant of the abdomen and the rectum below. (27 Sep 1997) |
| colon obstruction | <radiology> Primary colon carcinoma (70%), diverticulitis (spasm, scarring), volvulus (caecal, sigmoid), inflammatory stricture (IBD, etc.), extrinsic lesion (hernia, neoplasm), faecal impaction, intussusception, Hirschsprung disease, imperforate anus, meconium plug, adhesions, retractile mesenteritis Note: left colon more common, more subacute than SBO (12 Dec 1998) |
| colon pelvinum | <anatomy> The portion of the colon that connects to the descending colon above and the rectum below. (27 Sep 1997) |
| colon sigmoideum | <anatomy> The portion of the colon that connects to the descending colon above and the rectum below. (27 Sep 1997) |
| colon transversum | <anatomy> The third division of the colon (large intestine). It communicates with the ascending colon in the upper right-hand quadrant of the abdomen and the descending colon in the upper left-hand quadrant. (19 Jan 1998) |
| plica semilunaris of colon | One of the folds of the wall of the colon between sacculations. Synonym: plica sigmoidea, semilunar fold of colon. (05 Mar 2000) |
| muscular coat of colon | Muscular layer of the wall of the colon. Synonym: tunica muscularis coli. (05 Mar 2000) |
| polypsis of the colon | Multiple polyps with a high malignant potential in large bowel. This hereditary condition is also known as polypsis coli and familial adenomatous polyposis. (12 Dec 1998) |
| prediverticular disease of colon | <radiology> Longitudinal and circular muscle thickening with redundancy of folds secondary to myostatic contracture findings: saw tooth sign: crowding and thickening of haustral folds (shortening of colonic segments), superimposed muscle spasm (relieved by antispasmodics) Differential diagnosis: hemmorhage; ischemia; radiation; pseudomembranous colitis see: divericular disease of colon (12 Dec 1998) |