BACKGROUND/AIMS: Laterally spreading tumors (LST) were growthed along the colonic wall. These tumors were high malignant potential compared to colon polyp. We analyzed clinicopathological characteristics of these tumors. METHODS: From June 1996 to June 2001, twenty nine patients were diagnosed by colonoscopy. These lesions were classificated macroscopic (granular type and nongranular type) and microscopic findings. RESULTS: 20 male and 9 female were enrolled (mean age, 68.1). Among the LST, 41.4% were 20~30 mm in diameter, and 7% were larger than 30 mm. According to macroscopic findings granular types were 72.4% (21/29) and nongranular types were 27.6% (8/29). In macroscopic findings, tubular types were 48.4% (14/29), malignant changes were 31.3% (9/29). Tumor size was only significant factor in malignant potential of LST (p=0.004). Endoscopic mucosal resection was performed in 72.4% (21/29), operation in 8 (27.6%). Rate of submucosal invasion in LST was 3.4% (1/29, sm1). Recurrent rate of endoscopic treatment group was 9.5% (2/21). CONCLUSIONS: Most of LST were good indication for endoscopic treatment, but larger tumor size and irregular surface of tumor were suspected to be submucosal invasion. Therefore these lesions were performed other procedures as endoscopic ultrasound or computerized tomography for invasion depth.
Colon ; Colonoscopy ; Female ; Humans ; Male ; Polyps ; Ultrasonography

No abstract available.
Colon* ; Colonic Neoplasms* ; Humans ; Sparganosis* ; Ultrasonography*

Because primary lymphoma of the appendix is a very rare disorder and commonly presented as acute appendicitis,it is seldom diagnosed by preoperative imaging study. We encountered a patient with pathologically proved primaryappendiceal lymphoma associated with acute and chronic appendicitis. Ultrasonogram revealed a non-compressiblesausage-shaped hypoechoic mass with a linear hyperechoic center caused by mucosa-lumen interface in right lowerquadrant. Post-contrast CT examination showed a markedly enlarged target-like appendix with obliteration of thelumen; the outer layer showed higher attenuation than the central portion. There were also multiple strands in theperiappendiceal fat and thickening of adjacent lateroconal fascia and colonic wall, and this suggested acuteappendicitis associated with appendiceal lymphoma.
Appendicitis* ; Appendix ; Colon ; Fascia ; Humans ; Lymphoma* ; Ultrasonography

The incidence of lymphangiomas in the gastrointestinal tract is low, particularly in the colon and rectum, and most cases are solitary. Lymphangiomatosis of the colon are encountered infrequently with only one report in the English literature, and polypectomy was performed for the diagnosis in that case report. However, trends in the diagnosis of lymphangiomatosis of colon have been changing since the development of endoscopic ultrasonography (EUS), and this case is the first in that lymphangiomatosis of the colon was diagnosed without invasive procedures. Here we describe the case of 31-yr-old woman with lymphangiomatosis of the colon with numerous polyposis-like appearing lesions diagnosed by endoscopic ultrasonography and a colonoscopy.
Adult ; Colon/ultrasonography ; Colonic Neoplasms/*diagnosis/pathology/ultrasonography ; Colonoscopy ; Endosonography ; Female ; Humans ; Lymphangioleiomyomatosis/*diagnosis/pathology/ultrasonography

BACKGROUND/AIMS: In EMR, submucosal saline injection is used in order to prevent perforation and hemorrhage, but it is not well known on the physiological change of submucosal layer by injected saline. This study was undertaken to assess experimentally the physiological change of submucosal layer after the saline injection on mongrel's surgical specimens. METHODS: Twenty one fresh specimens were obtained from esophagus, stomach and colon for 3 mongrels' experiments. Saline was injected from 1 mL to 20 mL into submucosa of all specimens on which target areas were made by electrocautery markings. By gross morphology of the elevated area and endoscopic sonographic image and by histological features on submucosa of each specimen, mucosal extension was measured after saline injection. RESULTS: The height of blebs and minimal diameters of target areas made increased up to a fixed dose, but did not increased after that. However, the maximal and minimal diameters of elevated areas and the difference between these diameters increased proportional to the volume of injected saline. Moreover, retained salines were interspersed evenly among the connective tissues in submucosa despite of the increasing dose of injected saline. CONCLUSION: Morphological change in submucosa is not changed proportional to the volume of injected saline.
Blister ; Colon ; Connective Tissue ; Electrocoagulation ; Esophagus ; Hemorrhage ; Stomach ; Ultrasonography

The appendiceal mucocele is a rare disorder, usually found incidentally during ultrasonography or radiologic studies. Mucoceles of the appendix include benign or malignant disease. Both of benign cystadenoma and malignant cystadenocarcinoma are characterized by an obstructed, mucin-filled appendix displacing the cecum. We experienced a case of partial obstruction of large bowel who had a cystadenoma at appendix and a colon cancer at other site on operation field. Here in, we report a case of appendiceal mucocele and concominant colon cancer with the review of literatures.
Appendix ; Cecum ; Colon* ; Colonic Neoplasms* ; Cystadenocarcinoma ; Cystadenoma ; Mucocele* ; Ultrasonography

A gastrointestinal lipoma, though rare, is a mesencymal tumor of the large bowel, and the second most common benign colonic tumor detected after an adenomatous polyp. The lesion may be asymoptomatic when small and may be detected incidentally, usually during a colonoscopic examination for another purpose. Lipomas of the large bowel that are not causing symptoms probably need no treatment, as malignant transformation has not been documented. If the mass is large, it can cause pain, anal bleeding due to intussusception, bowel obstruction and diarrhea, and thus resection should be considered. Due to the risk of perforation, endoscopic resection of large colonic lipomas has been discouraged. However, large colonic lipomas can be removed safely by endoscopic resection with the use of an endoscopic ultrasonogram and submucosal injection to elevate the lesion.
Adenomatous Polyps ; Colon* ; Diarrhea ; Hemorrhage ; Intussusception ; Lipoma* ; Ultrasonography

Colovesical fistulae secondary to diverticulitis usually manifest themselves as non-specific lower abdominal discomfort and urologic symptoms. CT is known to be the most sensitive modality for diagnosing this entity. Ultrasonography is the initial diagnostic tool used for evaluating patients with these symptoms, but there have been no reports describing the ultrasonographic findings of colovesical fistulae in Korea. Therefore, we present a case of an ultrasonographically diagnosed colovesical fistula complicating sigmoid diverticulitis. Color Doppler ultrasonography was used in conjunction with lower abdominal compression in order to determine if the fistulous tract was open or obliterated.
Colon ; Colon, Sigmoid ; Diverticulitis ; Fistula ; Humans ; Intestinal Fistula ; Korea ; Ultrasonography, Doppler, Color ; Urinary Bladder

Carcinoma of the colon is extremely rare in pediatric patients, and due to the preponderance of poor histological characteristics and the difficulty of diagnosis, the prognosis in children is quite unfavorable. We describe a case of ruptured and disseminated mucinous adenocarcinoma of the descending and sigmoid colon in a 14-year-old boy with abdominal pain, diarrhea and fever. Ultrasonography and computed tomography revealed a large soft tissue mass containing tiny calcifications and poorly enhanced hypodense portions in the thickened descending and sigmoid colon, as well as abundant ascites. Where images reveal a mass with low attenuation, calcifications, and aggressive dissemination, mucinous adenocarcinoma may be preferentially included in the differential diagnosis of a pedriatic colon tumor.
Abdominal Pain ; Adenocarcinoma, Mucinous* ; Adolescent ; Ascites ; Child* ; Colon* ; Colon, Sigmoid ; Diagnosis ; Diagnosis, Differential ; Diarrhea ; Fever ; Humans ; Male ; Mucins* ; Prognosis ; Ultrasonography

PURPOSE: To investigate the CT findings of acute right colonic diverticulitis, and to determine the differencebetween these and published reports deseribing left colonic, especially sigmoid, diverticulitis. MATERIAL AND METHODS: In 13 patients with acute right lower quadrant pain who underwent ultrasonography a normal appendix wasdemonstrated and acute right colonic diverticulitis was suspected. CT was performed within 24 hours and thefindings were analysed by two radiologists. For further confirmation of diverticulitis, follow-up barium enemaswere performed in ten patients. RESULTS: Inflamed diverticula were visible in all cases, and were solitary. Ninecases occured in the ascending colon and four in the cecum; in particular, eleven occurred around the ileocecalvalve. In three cases, the inflamed diverticulum was less than 1cm in diameter;in five cases, 1-2cm;in three,2-3cm, and in two, 3-4cm. These were able to be classified into two major forms. In three cases it was nodularwith hyperattenuation and some inhomogeneity, and ten shows the target form with thick walls and a central cavity.In five of these target lesions, the wall pattern was partially or completely inhomogenous, or multilayered. Thematerials filling the central cavity were gas in five cases, fecalith in two, and fluid in three. Abnormalpericoloic fat infiltrations were seen in twelve cases(92%), segmental colonic wall thickening in eleven(85%),other not-inflamed diverticula in five(38%), mesenteric lymph node enlargement in three(23%), free pericecal fluidcollection in three(23%), and perirenal fascial thickenings in two(15%). The complications such as remote abscesscavity, colonic obstruction, fistula or perforation were not found. On barium colon study, diverticulitis was inall cases confirmed by the presence of barium in the deformed diverticulum. CONCLUSION: Among CT findings foracute right colonic diverticulitis, the most important and pathognomonic is inflamed diverticula; the forms ofthese vary, and include gangrenous diverticulitis. The CT findings of early right colonic diverticulitis inKoreans might not, however, reveal the complications which sigmoid diverticulitis frequently involves; in patientswith right lower quadrant pain imaging studies are performed promptly, and for the mesentery, the anatomical basebetween right and left colons is different.
Appendix ; Barium ; Cecum ; Colon* ; Colon, Ascending ; Colon, Sigmoid ; Diverticulitis ; Diverticulitis, Colonic* ; Diverticulum ; Fecal Impaction ; Fistula ; Follow-Up Studies ; Humans ; Lymph Nodes ; Mesentery ; Ultrasonography