Korean Society of Thyroid-Head and Neck Surgery appointed a Task Force to provide guidance on the implementation of a surgical treatment of oral cancer. MEDLINE databases were searched for articles on subjects related to “surgical management of oral cancer” published in English. Results were restricted to systematic reviews, randomized control trials/controlled clinical trials, and observational studies. The quality of evidence was rated with use RoBANS (Risk of Bias Assessment Tool for Nonrandomized Studies) and AMSTAR (A Measurement Tool to Assess the Methodological Quality of Systematic Reviews). Evidence-based recommendations for practice were ranked according to the American College of Physicians grading system. Additional directives are provided as expert opinions and Delphi questionnaire when insufficient evidence existed. The Committee developed 68 evidence-based recommendations in 34 categories intended to assist clinicians and patients and counselors, and health policy-makers. Proper surgical treatment selection for oral cancer, which is directed by patient- and subsite-specific factors, remains the greatest predictor of successful treatment outcomes. These guidelines are intended for use in conjunction with the individual patient's treatment goals.
Advisory Committees ; Bias (Epidemiology) ; Carcinoma, Squamous Cell ; Counseling ; Expert Testimony ; Humans ; Mouth Neoplasms ; Neck ; Republic of Korea

BACKGROUND/AIMS: Laparoscopic Heller myotomy with antireflux procedure is considered to be a standard treatment for achalasia. Recently, peroral endoscopic myotomy (POEM) was developed and performed on patients with achalasia. However, there is no report on POEM use in South Korea. The aim of this study was to evaluate the technical feasibility of POEM in a porcine model. METHODS: POEM was performed on two mini pigs. We performed upper endoscopy under general anesthesia. A submucosal tunnel was created and the circular muscle layer was incised using several knives. The mucosal entry was closed using resolution clips. We performed a follow-up endoscopy and sacrificed the pigs 2 weeks after the POEM. The myotomy site was evaluated grossly and histologically. RESULTS: POEM was successfully performed on the two mini pigs. No injuries to any abdominal or mediastinal structures occurred. Two weeks after the POEM, the esophageal mucosa healed without any endoscopic evidence of complications. Necropsy revealed that the circular muscle layer was completely lost and replaced with fibrotic tissue. CONCLUSIONS: We found that POEM is a technically feasible method which can be performed on an animal model. However, to ensure safe use on patients with achalasia, further studies on technical methods and long-term follow-up examinations are required.
Anesthesia, General ; Animals ; Dietary Sucrose ; Endoscopy ; Esophageal Achalasia ; Esophagus ; Feasibility Studies ; Follow-Up Studies ; Humans ; Models, Animal ; Mucous Membrane ; Muscles ; Republic of Korea ; Swine

Large-cell neuroendocrine carcinoma of the colon is a rare entity with a prognosis that is usually poor due to the high likelihood of early metastasis. A 61-year-old man had surgery for colon cancer of the transverse colon and cecum. Microscopic examination of the tumor showed that the location was the proximal transverse colon, with small nests containing rosettes and palisading patterns of large tumor cells with faintly granular cytoplasm. The immunohistochemistry was positive for synaptophysin and chromogranins. The tumors were diagnosed as a large-cell neuroendocrine carcinoma of the colon. In addition, the tumor of the cecum showed microscopic findings consistent with a well-differentiated adenocarcinoma. The immunohistochemical panel showed that the tumor was negative for neuroendocrine markers. There were no clinical findings suggestive of hormone hypersecretion. Cancer metastasis was found in the peritoneum section of the small bowel. Postoperative chemotherapy was applied. The patient was alive with good performance after, and there was no sign of tumor progression. This is the first case of a synchronous large-cell neuroendocrine carcinoma and adenocarcinoma of the colon. The patient was treated successfully with debulking surgery and systemic chemotherapy.
Adenocarcinoma ; Carcinoma, Neuroendocrine ; Cecum ; Chromogranins ; Colon ; Colon, Transverse ; Colonic Neoplasms ; Cytoplasm ; Humans ; Immunohistochemistry ; Middle Aged ; Neoplasm Metastasis ; Neoplasms, Multiple Primary ; Peritoneum ; Prognosis ; Synaptophysin

BACKGROUNDS/AIMS: The ultimate goal of antiviral therapy using interferon/pegylated interferon combined with ribavirin in chronic C-viral hepatitis is to achieve a sustained virologic response (SVR). Several studies have shown that the reappearance rate of hepatitis C virus (HCV) RNA in serum after the achievement of an SVR is less than 1%; the durability of an SVR in Korean patients is not known. The aim of this study was to determine the durability of the virologic response in chronic hepatitis C patients with an SVR to antiviral therapy. METHODS: A total of 156 patients who were treated successfully with interferon/peginterferon and ribavirin were evaluated retrospectively. Patients received either subcutaneous conventional interferon alpha 3x10(6) units three times a week or subcutaneous pegylated interferon (alpha-2a: 180 microgram, alpha-2b: 80-100 microgram) once a week in combination with ribavirin at 600-1,200 mg daily (depending on body weight). Patients with HCV genotype 1 were treated for 48 weeks, whereas those with non-genotype 1 were treated for 24 weeks. RESULTS: Eighty-two patients underwent treatment with conventional interferon and ribavirin, whereas 74 patients were treated with pegylated interferon and ribavirin. An SVR was achieved in 73 patients (73/156, 46.8%). HCV RNA reappeared in eight patients (8/73, 11.0%; detected by qualitative PCR), including one patient with persistent viremia (1/73, 1.4%). CONCLUSIONS: Reappearance of HCV RNA after earlier achievement of an SVR might appear more frequently than previously reported. Close follow-up of these patients is recommended and the implication of temporary viremia should be determined in the future.
Adult ; Antiviral Agents/*therapeutic use ; Drug Therapy, Combination ; Female ; Genotype ; Hepatitis C, Chronic/*drug therapy ; Humans ; Interferon Alfa-2a/*therapeutic use ; Interferon-alpha/*therapeutic use ; Male ; Middle Aged ; Polyethylene Glycols/*therapeutic use ; RNA, Viral/metabolism ; Recurrence ; Retrospective Studies ; Ribavirin/*therapeutic use ; Viremia/drug therapy

BACKGROUND/AIMS: This study was designed to compare the survival rates between patients with localized esophgeal cancer who were treated with concurrent chemoradiation therapy without surgery and patients who were treated with concurrent chemoradiation therapy including surgery. METHODS: Eighty-eight patients from January 1997 to December 2005 with locally advaned resectable esophageal cancer were selected and retrospectively analyzed. Survival period was defined as the time to death from the date of diagnosis or mid-monitor period of December 2005. Sixty-one patients were treated with chemoradiation therapy alone while twenty-seven patients were treated with chemoradiation therapy in addition to surgery as for curative intention. As for radiation therapy, 5,000-5,500 cGY was used. 5-Fluouracil and cisplatin were used for chemotherapy. The primary end point was overall survival time. The secondary end point was overall progression free survival time. RESULTS: There was no significant difference in tissue type, location and clinical staging, but the median age was significantly younger in the group treated with surgery (63.4 years) than the group treated without surgery (68.8 years). Median period analyzed was 17.3 months. Five year survival rate for the group with chemoradiation alone was 7.4% and 4% for the group with surgery. The median survival rate was 11+/-3 months for the group with chemoradiation alone and 10+/-6 months for the group with surgery, in which there was no statistical difference (p=0.697). CONCLUSIONS: There was no significant increase in survival rate in patients who were treated by chemoradiation with surgery compared with chemoradiation alone. Further analysis in terms of prospective study is needed.
Aged ; Aged, 80 and over ; Antineoplastic Agents/therapeutic use ; Combined Modality Therapy ; Data Interpretation, Statistical ; Esophageal Neoplasms/radiotherapy/surgery/*therapy ; Female ; Humans ; Male ; Middle Aged ; Neoplasm Staging ; Survival Rate

A ganglioneuroma is a benign tumor composed of ganglion cells, nerve fibers, and supporting cells that originates from the neural crest. An occurrence of a ganglioneuroma is mainly along the pathway of the sympathetic chain. However, it is rare to find the lesion in the gastrointestinal tract. A ganglioneuroma of the gastrointestinal tract appears to involve predominantly the colon and rectum, but rarely involves the upper gastrointestinal tract. An intestinal ganglioneuroma is divided into three subgroups: a polypoid ganglioneuroma, ganglioneuromatous polyposis, and diffuse ganglioneuromatosis. A polypoid ganglioneuroma is not associated with systemic disease. However, ganglioneuromatous polyposis and diffuse ganglioneuromatosis are highly associated with systemic diseases. A 33-year-old woman who had no specific family history visited our institution with a complaint of abdominal discomfort. A single polyp was found incidentally in the descending colon during a colonoscopy and it was treated by snare polypectomy. The patient had no associated systemic disease and histology of the polyp revealed a ganglioneuroma. We report a patient with a polypoid ganglioneuroma of the colon.
Adult ; Colon ; Colon, Descending ; Colonoscopy ; Female ; Ganglion Cysts ; Ganglioneuroma ; Gastrointestinal Tract ; Humans ; Neural Crest ; Neurons ; Polyps ; Rectum ; SNARE Proteins ; Upper Gastrointestinal Tract

PURPOSE: PET-CT is often used to differentiate benign or malignant thyroid incidentalomas. In this retrospective study, we evaluated whether the ¹⁸F-FDG uptake pattern and PET-CT findings improved accuracy over the standardized uptake value (SUV). METHODS: ¹⁸F-FDG PET-CT was performed on 2,178 subjects from August, 2004, to October, 2007, in Sung-ae Hospital. PET-CT was performed on 806 patients (37%) with suspected or known nonthyroidal cancer and 1,372 healthy subjects (63%) without a previous history of cancer. We investigated the clinical characteristics of patients, history, standardized uptake value (SUV), ultrasonography, and hormone levels in blood. Thyroidal cancer was confirmed by ultrasonography-guided fine needle aspiration and pathology after thyroid operation. RESULTS: The prevalence of focal thyroid lesions on PET-CT was 8.8% (191/2178). Thyroid cancer confirmation was 7.9% (15/191). The maximum SUV of malignant thyroid lesions were significantly higher than that of benign lesions (7.00±3.08 vs. 4.49±1.84, P<0.001). CONCLUSION: PET-CT image interpretation that includes 18F-FDG uptake and SUV is better than PET-CT alone for differentiating benign and malignant lesions. Thyroid cancer risk increases as SUVmax levels increase.
Biopsy, Fine-Needle ; Fluorodeoxyglucose F18 ; Healthy Volunteers ; Humans ; Pathology ; Prevalence ; Retrospective Studies ; Thyroid Gland* ; Thyroid Neoplasms ; Ultrasonography

BACKGROUND: To determine the benefits of laparoscopic surgery compared with exploration, the clinical outcomes of open and laparoscopic distal pancreatectomy were compared. METHOD: From March 2005 to June2007, we studied 95 patients at Asan Medical Center. These patients had benign pancreatic disease in the distal pancreas, e.g. a cystic neoplasm. These patients underwent a distal pancreatectomy with or without spleen-preservation using laparoscopic or exploration surgery. We divided these patients into two groups i.e. laparoscopy (n=60) and exploration (n=35), and compared the outcomes of the two groups retrospectively. RESULT: There was no difference in demographic features between the two groups. Laparoscopic resection required a median time of 208 mins, compared with 190 mins for the open resection. (p>0.05) The laparoscopic patients started a liquiddiet on postoperative day three, and required a median hospital stay of 11 days, compared with 4.5 days and 16 days for the open resection surgery, respectively. (p<0.001) The overall postoperative complication rate was 28.3% for the laparoscopic group compared with 22.9% for the open group. (p>0.05) The pancreatic fistula rate was lower in the laparoscopic patient group than in the open group. (8.3% vs. 14.3%) (p>0.05) The rate of spleen-preservation was higher in the laparoscopy group than the open group. (25% vs. 5.7%), (p>0.05) CONCLUSION: The results of this study showed that the laparoscopic distal pancreatectomy had a similar surgical time, an early start of the diet, a shorter hospital stay, and a higher spleensaving rate, compared to exploration surgery. Therefore, considering the benefits of laparoscopic surgery, it appears to be the preferred approach, with or without spleen-preservation, for treating benign distal pancreatic disease.
Chungcheongnam-do ; Diet ; Humans ; Laparoscopy* ; Length of Stay ; Operative Time ; Pancreas ; Pancreatectomy* ; Pancreatic Diseases ; Pancreatic Fistula ; Postoperative Complications ; Retrospective Studies

Human embryonic stem (ES) cells can be induced to differentiate into hematopoietic precursor cells via two methods: the formation of embryoid bodies (EBs) and co-culture with mouse bone marrow (BM) stromal cells. In this study, the above two methods have been combined by co-culture of human ES-cell-derived EBs with human BM stromal cells. The efficacy of this method was compared with that using EB formation alone. The undifferentiated human ES cell line SNUhES3 was allowed to form EBs for two days, then EBs were induced to differentiate in the presence of a different serum concentration (EB and EB/high FBS group), or co- cultured with human BM stromal cells (EB/BM co-culture group). Flow cytometry and hematopoietic colony-forming assays were used to assess hematopoietic differentiation in the three groups. While no significant increase of CD34+/CD45- or CD34+/CD38- cells was noted in the three groups on days 3 and 5, the percentage of CD34+/CD45- cells and CD34+/ CD38- cells was significantly higher in the EB/BM co-culture group than in the EB and EB/high FBS groups on day 10. The number of colony-forming cells (CFCs) was increased in the EB/BM co-culture group on days 7 and 10, implying a possible role for human BM stromal cells in supporting hematopoietic differentiation from human ES cell-derived EBs. These results demonstrate that co-culture of human ES-cell-derived EBs with human BM stromal cells might lead to more efficient hematopoietic differentiation from human ES cells cultured alone. Further study is warranted to evaluate the underlying mechanism.
Stromal Cells/physiology ; Stem Cells/*cytology ; Humans ; Hematopoietic Stem Cells/*cytology ; Embryo/*cytology ; Coculture Techniques ; Cells, Cultured ; *Cell Differentiation ; Bone Marrow Cells/*cytology ; Antigens, CD45/analysis ; Antigens, CD38/analysis ; Antigens, CD34/analysis

While endovascular aneurysm repair (EVAR) is prevailing for the treatment of abdominal aortic aneurysm (AAA) in modern vascular practice, PURPOSE: we conducted nationwide questionnaire survey to investigate the current status of AAA treatment and their results in Korea. METHOD: We reviewed the replies from 28 hospitals (33 departments) to the questionnaire inquiring annual number, clinical features, mode of treatment and results of AAA patients during the period from Jan. 2000 to Jul. 2004. Results: 980 AAA patients were reported including 292 ruptured AAA (29.8%) and 688 non-ruptured AAA (70.2%). For treatment of AAA, 834 (85.1%) surgical repairs (SRs) and 111 (11.3%) endovascualr aneurysm repairs (EVARs) were performed while 35 patients (3.6%) died of AAA rupture before operation. The locations of AAA were infrarenal in 889 (90.7%), juxtarenal in 62 (6.3%), and suprarenal in 29 patients (3.0%). Among 834 patients undergoing SR, 577 patients (69.2%) had non-ruptured AAAs and 257 patients (30.8%) had ruptured AAAs. Mean operative mortality rate was 4.1% after elective SRs, 30.7% after SR for ruptured AAAs, and 2.3% after EVARs. The reported brand name of stent graft devices were various including domestic custom-made in 56 (50.5%), imported brand in 18 (16.2%) while 37 (33.3%) stent grafts were not reported their brand name. The frequencies of type I and III endoleaks after EVAR were reported 5.8% and 5.8% respectively in 86 patients with an available data. CONCLUSION: SR has been used as a major treatment option in Korea for the treatment of AAA patients while EVAR is increasing. The mortality rate of SR of AAA was comparable to western multi-center trial reports but mortality or morbidity rates of EVAR were unable to know in this questionnaire survey.
Aneurysm ; Aortic Aneurysm ; Aortic Aneurysm, Abdominal* ; Blood Vessel Prosthesis ; Endoleak ; Humans ; Korea* ; Mortality ; Questionnaires* ; Rupture ; Treatment Outcome