Dong Hyun Choi

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AIMS To evaluate the histopathological risk factors for lymph node metastasis in cases of pedunculated or semipedunculated submucosal invasive colorectal carcinoma (SICC). METHODS A total of 48 patients with non-sessile SICC who underwent systematic lymph node dissection were included. Tumour size, histological grade, angiolymphatic invasion, tumour(More)
Laparoscopic surgery for colorectal neoplasm requires precise tumor localization. The authors have assessed the safety and efficacy of colonoscopic tattooing using a saline test injection method with prepackaged sterile India ink for tumor localization in laparoscopic colorectal surgery. Between July 2004 and January 2007, 63 patients underwent colonoscopic(More)
Laparoscopic surgery demands mastery of a steep learning curve. Defining a learning curve in laparoscopic surgery is useful for planning training programs or clinical trials. This study aimed to define the learning curves for laparoscopic sigmoidectomy used to manage curable sigmoid colon cancer by evaluating early surgical outcome data from three(More)
PURPOSE The anastomotic leakage rate after rectal resection has been reported to be approximately 2.5-21 percent, but most results were associated with open surgery. The aim of this study was to identify risk factors and their relationship to the experience of the surgeon for anastomotic leakage after laparoscopic rectal resection. METHODS Between March(More)
PURPOSE This study explored predictive factors that affected oncologic outcomes after surgical resection or follow-up without surgery in patients with submucosally invasive colorectal carcinomas after endoscopic resection. METHODS Oncologic outcomes in terms of lymph node metastasis or tumor recurrence were assessed according to resection margin,(More)
BACKGROUND The nonlifting sign is widely used for evaluating the invasion depth of colorectal tumors, and it is commonly accepted that EMR is contraindicated for colorectal tumors with a nonlifting sign because of the probability of massive submucosal invasion. OBJECTIVE To identify the clinicopathologic factors that affect the nonlifting sign in(More)
In rectal cancer patients treated with preoperative chemoradiotherapy (CRT) and curative resection, we evaluated the effect of clinical parameters on lateral pelvic recurrence and made an attempt to identify a risk factor for lateral pelvic recurrence. The study involved 366 patients who underwent preoperative CRT and curative resection between October 2001(More)
BACKGROUND In Korea, few studies have been performed on screening instruments for the detection of at-risk drinking and alcohol use disorders in the elderly. This study evaluated the validity of three screening instruments in elderly male drinkers. METHODS The subjects were 242 Korean men aged ≥ 65 years. Face-to-face interviews were used to identify(More)
BACKGROUND We report a pure natural orifice translumenal endoscopic surgery (NOTES(®); American Society for Gastrointestinal Endoscopy [Oak Brook, IL] and the Society of American Gastrointestinal and Endoscopic Surgeons [Los Angeles, CA]) rectosigmoidectomy in animal models using transgastric endoscopic inferior mesenteric artery (IMA) dissection and(More)
Because physiological changes that potentially alter pharmacokinetics occurs in diabetes mellitus patients, pharamacokinetics of drugs used in the treatment of hypertension was studied using acebutolol as a model anti-hypertensive drug. Thus, the pharmacokinetics of acebutolol was investigated after oral administration of acebutolol (15 mg/kg) to control(More)