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• W1975332067 abstract "We have tried to perform Endoscopic Ultrasound (EUS) in any site of the colon and the rectum to observe the pathological conditions. The purpose of our study was to evaluate the clinical usefulness and reliability of EUS for colorectal diseases. Methods: We performed EUS using through-the-scope catheter probes or dedicated echocolonoscopes. Rigid rectal probes were used only near the anus. The advanced dedicated front-viewing echocolonoscope (CF-UMPQ230, Olympus Corp.) provides a 360 degree circular image with 20 or 7.5 MHz. This scope could be handled from the anus to the terminal ileum. EUS was performed totally 3161 times in 2297 patients (1077 women and 1220 men) with colorectal disease including 903 patients with cancer, 184 with ulcerative colitis, 110 with submucosal tumor, and 124 with extramural lesion from May 1984 to October 2004. The mean age of the patients was 58 years (range, 10-96). Pathological data were reviewed in all cases if the patient had surgery after EUS. Results: In 596 of 903 patients with cancer, surgical pathology results were available. The accuracy of EUS for T staging was 80%. In 100 patients with cancer, submucosal invasion was investigated. Tumors of sm-small were defined as those limited within the superficial 1/3 of the submucosa, tumors of sm-massive, extending from the middle 1/3 of the submucosal layer to the deeper portion near the muscularis propria. Tumors of sm-small had no lymph node metastasis. The accuracy rate of EUS for the pre-therapeutic diagnosis of sm invasion was 82%. In 184 patients with ulcerative colitis, EUS was performed for assessing the severity of inflammation. In active stage, the hypoechoic change extended from the mucosa to the deeper layer. In remission, the layer became normalized. EUS findings in the active stage were classified into UC-M, UC-SM, UC-SMdeep, UC-MP, and UC-SS/SE. Each stage corresponded well to the severity of inflammation. Submucosal tumors were differentiated from extramural lesions and diagnosed according to the echo level and location in the wall. Conclusions: EUS is a useful and reliable method for staging of cancer and in determining the indication of endoscopic resection for submucosal cancer. EUS makes us assess the severity of patients with ulcerative colitis and evaluate submucosal tumors. With advances and improvements of the instruments, EUS is an essential method for diagnosing more accurately colorectal diseases. We have tried to perform Endoscopic Ultrasound (EUS) in any site of the colon and the rectum to observe the pathological conditions. The purpose of our study was to evaluate the clinical usefulness and reliability of EUS for colorectal diseases. Methods: We performed EUS using through-the-scope catheter probes or dedicated echocolonoscopes. Rigid rectal probes were used only near the anus. The advanced dedicated front-viewing echocolonoscope (CF-UMPQ230, Olympus Corp.) provides a 360 degree circular image with 20 or 7.5 MHz. This scope could be handled from the anus to the terminal ileum. EUS was performed totally 3161 times in 2297 patients (1077 women and 1220 men) with colorectal disease including 903 patients with cancer, 184 with ulcerative colitis, 110 with submucosal tumor, and 124 with extramural lesion from May 1984 to October 2004. The mean age of the patients was 58 years (range, 10-96). Pathological data were reviewed in all cases if the patient had surgery after EUS. Results: In 596 of 903 patients with cancer, surgical pathology results were available. The accuracy of EUS for T staging was 80%. In 100 patients with cancer, submucosal invasion was investigated. Tumors of sm-small were defined as those limited within the superficial 1/3 of the submucosa, tumors of sm-massive, extending from the middle 1/3 of the submucosal layer to the deeper portion near the muscularis propria. Tumors of sm-small had no lymph node metastasis. The accuracy rate of EUS for the pre-therapeutic diagnosis of sm invasion was 82%. In 184 patients with ulcerative colitis, EUS was performed for assessing the severity of inflammation. In active stage, the hypoechoic change extended from the mucosa to the deeper layer. In remission, the layer became normalized. EUS findings in the active stage were classified into UC-M, UC-SM, UC-SMdeep, UC-MP, and UC-SS/SE. Each stage corresponded well to the severity of inflammation. Submucosal tumors were differentiated from extramural lesions and diagnosed according to the echo level and location in the wall. Conclusions: EUS is a useful and reliable method for staging of cancer and in determining the indication of endoscopic resection for submucosal cancer. EUS makes us assess the severity of patients with ulcerative colitis and evaluate submucosal tumors. With advances and improvements of the instruments, EUS is an essential method for diagnosing more accurately colorectal diseases." @default.
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• W1975332067 date "2005-04-01" @default.
• W1975332067 modified "2023-10-18" @default.
• W1975332067 title "Endoscopic Ultrasound for Colorectal Diseases Over a 20-Year Period" @default.
• W1975332067 doi "https://doi.org/10.1016/s0016-5107(05)01419-7" @default.
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