No abstract available.
Colon ; Colonic Neoplasms ; Polyps

A study on 97 patients with polyps diagnosed by endoscopy in central army hospital during 2000-2002 has shown that male/female (69/28), average ages (50), patients with one polyp, 2 polyps, 3 polyps, 4 polyps, 7 polyps and 8 polyps were 78, 15, 1, 1,1 and (1) respectively. The symptoms comprised abdominal pain (56%), dyspepsia (50%) blood and mucosa in feces (13%). Polyps concentrated in peripheral colon (43.80%). The rate of patients diagnosed early accounted for 4.2%
Colonic Polyps ; diagnosis

A series of 241 polyps from 127 patients endoscopically removed during the period from march 1991 through July 1992 at our department were analysed. The following items were studied. 1) Incidence, age, and sex distrlbution of the patients 2) Number of the calonic polyps 3) Histologic classification and polyp size 4) Anatomic distribution and polyp size 5) Gross types and polyp size 6) Hietopathologic types and polyp size In conclusion, colonic diminutive polyps should not be ignored or overlooked clinically. The majority were neoplastic polyps. It is suggested that diminutive polyps should be removed endoscopically if possible
Classification ; Colon* ; Colonic Polyps* ; Humans ; Incidence ; Polyps

Hemorrhage is the most common complication of polypectomy. Though most bleeding stops spontaneously and can be managed with conservative therapies, some may necessitate intensive therapies. The detachable snare was firstly introduced in 1986. It has been reported that the use of detachable snare can effectively prevent both immediate and delayed bleeding. The detachable snare has been reformed, and now a commercial article is used in practice. But, it is expensive and cannot be used in larger polyps measuring over its fixed size of loop. A hand-made detachable snare made of nylon fishing line was introduced to prevent postpolypectomy bleeding in 2003. We have further improved it and experienced a case of successful removal of a large colonic polyp using our hand-made snare. The hand-made detachable snare is inexpensive and seems to be practical in ligating the polyp regardless of its size.
Colonic Polyps ; Hemorrhage ; Nylons* ; Polyps ; SNARE Proteins*

A prospective study was conducted at Hue Central Hospital from Jan 2001 to Feb 2002 on 52 under 15 years old patients with 67.3% male. 72 polyps including 69 with pedicle and 3 without in one case, pedicle was created. There were one case of bleeding complication and one case of perforated rectum. Histopathology showed 86.8% were precuature polyps, 13.2% benign. An endoscopic controlled after 1-6 months did not show abnormal results
Colon ; Colonic Polyps ; Child ; Endoscopy

Acolonic polyp is a circumscribed mass of tissue that projects above the surface of the intestinal mucosa, which may be classified as either pedunculated or sessile, depending on whether or not it contains a discrete stalk, and according to the size and type. It has been believed that colorectal cancer evolves from a precursor lesion, the adenomatous polyp. The introduction of colonoscopy in the early 1970s, followed by the demonstration of the feasibility of colonoscopic polypectomy, provided the technology for the application of this concept to clinical practice. Colorectal cancer can be prevented through examination of the entire colon and identification of a polyp to be resected. According to the National Polyp Study in the USA, the incidence of colorectal cancer is reduced by 76~90% following colonoscopic polypectomy. Colonoscopy and polypectomy, when performed by adequately trained physicians, is a safe and effective procedure that can decrease deaths resulting from colorectal cancer.
Adenomatous Polyps ; Colon ; Colonic Neoplasms ; Colonic Polyps ; Colonoscopy ; Colorectal Neoplasms ; Diagnosis* ; Incidence ; Intestinal Mucosa ; Polyps*

BACKGROUND/AIMS: Colonic adenomatous polyp is known as a premalignant lesion. Colonoscopic polypectomy, using for its removal and prevention of primary colon cancer has been considered as a effective and safe method. This study was conducted to assess its complication and safety of colonoscopic polypectomy. METHODS: One thousand two hundred ninety three polypectomy were done using colonoscopic hot biopsy, snare polypectomy, endoscopic mucosal resection (EMR) and piecemeal polypectomy in 679 patients from 1983 to 1999, and postpolypectomy complications and its rate were evaluated. RESULTS: 1) Postpolypectomy bleeding occured 18 cases of 1293 polypectomies (1.4%), including 10 cases of initial bleeding and 8 cases of delayed bleeding. In 9 cases (0.7%) of them hemostatic therapy were required. In delayed bleeding most cases (75%) of them occured within 66 hours after polypectomy. 2) Postpolypectomy bleeding occured in 10 cases of 982 polypectomies (1.0%) below 0.9 cm in polyp diameter, 5 cases of 242 polypectomies (2.1%) between 1.0 cm and 1.9 cm in polyp diameter and 3 cases of 69 polypectomies (4.3%) more than 2.0cm in polyp diameter (p<0.05). 3) There were no significant correlation between postpolypectomy bleeding and polypectomy methods (p=0.06) and between postpolypectomy bleeding and gross type of polyps (p=0.40) statistically. 4) Postpolypectomy perforation occured in 1 case of 1293 polypectomies (0.1%). Estimated overall postpolypectomy complication rate including bleeding and perforation was 1.5%. CONCLUSIONS: Colonoscopic polypectomy is a relatively safe method in removing colonic polyp and its complication is related to size of polyp.
Adenomatous Polyps ; Biopsy ; Colon ; Colonic Neoplasms ; Colonic Polyps ; Colonoscopy ; Hemorrhage ; Humans ; Polyps ; SNARE Proteins

Until recently, colorectal polyps were classified predominantly as hyperplastic or adenomatous. While adenomatous polyps are well-characterized precursor lesions of adenocarcinomas, hyperplastic polyps have been considered as benign lesion. However, some hyperplastic polyps with serrated morphology of the crypts have been recognized to have distinctive features and these polyps were termed 'serrated adenomas'. Recent data show that sessile serrated adenomas (SSA) might be the precursors of serrated colonic cancers, underlining the necessity of identifying them. SSA is approximately 3% of all polyps, commonly appears as flat or sessile and yellowish due to mucus production. In the pathogenesis of SSA, progression to high grade dysplasia or early invasive carcinoma may be associated with serrated neoplasia pathway different from adenoma-carcinoma sequence. We report a case with a colon polyp diagnosed as sessile serrated adenoma with high grade dysplasia after endoscopic submucosal dissection.
Adenocarcinoma ; Adenoma ; Adenomatous Polyps ; Colon ; Colonic Neoplasms ; Mucus ; Polyps

BACKGROUND/AIMS: The aim of this study was to evaluate the efficacy of high definition (HD) i-SCAN for colorectal polyp detection in screening colonoscopy. METHODS: We retrospectively analyzed the records of 501 patients who had undergone screening colonoscopy performed by three endoscopists with either HD i-SCAN (n=149) or standard white light (n=352) from January 2, 2014 through June 30, 2014. Patient information and inter-endoscopist variation as well as polyp number, endoscopic findings, and pathologic characteristics were reviewed. RESULTS: The detection rates of colorectal and neoplastic polyps were significantly higher using HD i-SCAN than standard white light colonoscopy (52% vs. 38.1%, p=0.004 for colorectal polyps; and 37.2% vs. 27.9%, p=0.041 for neoplastic polyps). Analysis of endoscopic findings revealed no difference in detected polyp size between HD i-SCAN and standard white light colonoscopy (4.59+/-2.35 mm vs. 4.82+/-2.81 mm, p=0.739), but non-protruding polyps were more commonly detected by i-SCAN than by standard white light colonoscopy (24.6% vs. 13.5%, p=0.007). CONCLUSIONS: Colonoscopy using HD i-SCAN had a significantly higher detection rate of colorectal polyps, including neoplastic polyps, because of improved sensitivity for detecting non-protruding lesions.
Colonic Polyps ; Colonoscopy* ; Humans ; Mass Screening* ; Polyps* ; Retrospective Studies

BACKGROUND/AIMS: The influence of the endoscopist on the polyp detection rate (PDR) is underappreciated in clinical practice. Moreover, flat lesions or lesions of the proximal colon are more difficult to detect. Here, we evaluated the differences in the PDR and the characteristics of detected polyps according to the experience of the colonoscopist. METHODS: We collected data on 2,549 patients who underwent screening colonoscopy performed by three fellows. The PDR was calculated according to the percentage of patients who had at least one polyp (method A) and according to the percentage of detected lesions (method B). The primary outcome included the change in the PDR, and the secondary outcome included the change in the characteristics of the detected polyps with increasing experience of the colonoscopist. RESULTS: No proportional correlation was found between the PDR and increasing experience in colonoscopy with method A; however, with method B, the PDR increased after 400 colonoscopies (p=0.0209). With method B, the detection rates of small polyps (<5 mm) (p=0.0015) and polyps in proximal sites (p=0.0050) increased after 300 colonoscopies. CONCLUSIONS: Our study demonstrated that the quality of a colonoscopy, measured by using the PDR, may increase when performed by experienced fellows.
Colon ; Colonic Polyps ; Colonoscopy ; Humans ; Mass Screening ; Polyps*