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PubMedDate not supplied

The safety of hot biopsy forceps in the removal of small colonic polyps.

Nine hundred and seven polyps (mean size 3.7 mm; range 2-8) from 460 patients (mean age 67 years; range 34-94) were removed with monopolar electrocoagulation forceps ('hot biopsy forceps'). Sixty-three percent of the polyps were adenomatous and 36% were hyperplastic. In this series there were 3 cancers and 1 neurofibroma. About 42% of the polyps were in the sigmoid-rectum region; the rest were evenly distributed in the remaining part of the colon. There were no complications. Specifically there were no cases of perforation or massive bleeding after removal of these polyps. Within the guidelines mentioned, hot biopsy removal of small colonic polyps is safe.

Adenomatous Polyps↗
PubMed2006

Colonic polyps: effect of attenuation of tagged fluid and viewing window on conspicuity and measurement--in vitro experiment with porcine colonic specimen.

PURPOSE: To investigate effect of attenuation of tagged fluid and viewing window on polyp conspicuity and measurement with porcine colonic specimen. MATERIALS AND METHODS: Eleven (3-10-mm-diameter) polyps were created in porcine colon and the specimen submerged in saline. Four-detector row CT was performed after gas distension and after filling with six barium sulfate suspensions (attenuation, 100-1000 HU). Two readers independently measured maximal two-dimensional polyp diameter on each data set with the following four viewing windows and window levels and window widths, respectively: colon (-150 HU, 1500 HU), lung (-500 HU, 1500 HU), bone (500 HU, 2500 HU), and abdomen (40 HU, 400 HU). In consensus, polyp conspicuity (compared with air data set) was assigned a grade of 1-4 for each viewing window (grade 1, not seen or barely visible; grade 4, optimally seen). For statistical analysis, conspicuity grades were collapsed to a two-point scale. Data were analyzed with Mann-Whitney, Kruskal-Wallis, and chi2 tests. RESULTS: Accuracy of polyp measurement was independent of viewing window for attenuation of tagged fluid of 100-300 HU but differed significantly for 500-1000 HU (P < .001); that for colonic and bone viewing windows was superior (median size difference, 1.0 mm; interquartile range, 0.5-1.5). Conspicuity differed significantly according to viewing window at all attenuation values (P < .001). For 100-300 HU with abdominal viewing window, 83% (24 of 29) of observations were assigned grade 3 or 4 (best). For 500-1000 HU with bone viewing window, 94% (30 of 32) of observations were assigned grade 3 or 4 (superior). Overall conspicuity was best with bone viewing windows at 700 HU. CONCLUSION: Polyp conspicuity and measurement in tagged data sets were optimized at 700 HU with bone viewing windows. At less than 300 HU, conspicuity improved with abdominal viewing windows.

Animals↗
PubMed1985

Colon polyps and carcinomas: prospective comparison of the single- and double-contrast examination in the same patients.

Single-contrast (SC) and double-contrast (DC) colon examinations were compared in 425 consecutive patients for detection of polyps and stricturing carcinomas. Each patient was examined with both SC and DC during the same session. In patients with carcinoma, there was no significant difference between the two modalities. DC was far superior to SC for detection of rectal or colonic polyps (p less than 0.05); however, the techniques appeared to be complementary in the sigmoid and cecum. The authors conclude that DC is superior to SC as a means of screening for polyps of the rectum and colon, with SC being useful as an adjunct in problem areas such as the sigmoid and cecum.

Adolescent↗
PubMed1989

Gardner syndrome. Early presentation with a desmoid tumor. Discovery of multiple colonic polyps.

A 14-year-old patient who was eventually found to have Gardner syndrome initially presented at the age of 3 years with a desmoid tumor involving the scalp. A careful review of the family history revealed a high incidence of colonic cancer, which prompted endoscopic evaluation of the patient. The discovery of adenomatous polyps in the colon confirmed the diagnosis of Gardner syndrome. In patients with hard or soft tissue tumors, the possibility of Gardner syndrome should be kept in mind, and a thorough family history taken. Early diagnosis may prevent malignant transformation of colonic polyps.

Adolescent↗