1.Clinical Outcomes and Risk Factors of Traumatic Pancreatic Injuries.
Hong Tae LEE ; Jae Il KIM ; Pyong Wha CHOI ; Je Hoon PARK ; Tae Gil HEO ; Myung Soo LEE ; Chul Nam KIM ; Surk Hyo CHANG
Journal of the Korean Society of Traumatology 2011;24(1):1-6
		                        		
		                        			
		                        			PURPOSE: Even though traumatic pancreatic injuries occur in only 0.2% to 4% of all abdominal injuries, the morbidity and the mortality rates associated with pancreatic injuries remain high. The aim of this study was to evaluate the clinical outcomes of traumatic pancreatic injuries and to identify predictors of mortality and morbidity. METHODS: We retrospectively reviewed the medical records of 26 consecutive patients with a pancreatic injury who underwent a laparotomy from January 2000 to December 2010. The data collected included demographic data, the mechanism of injury, the initial vital signs, the grade of pancreatic injury, the injury severity score (ISS), the revised trauma score (RTS), the Glasgow Coma Scale (GCS), the number of abbreviated injury scales (AIS), the number of associated injuries, the initial laboratory findings, the amount of blood transfusion, the type of operation, the mortality, the morbidity, and others. RESULTS: The overall mortality rate in our series was 23.0%, and the morbidity rate was 76.9%. Twenty patients (76.9%) had associated injuries to either intra-abdominal organs or extra-abdominal organs. Two patients (7.7%) underwent external drainage, and 18 patients (69.3%) underwent a distal pancreatectomy. Pancreaticoduodenectomies were performed in 6 patients (23.0%). Three patients underwent a re-laparotomy due to anastomosis leakage or postoperative bleeding, and all patients died. The univariate analysis revealed 11 factors (amount of transfusion, AAST grade, re-laparotomy, associated duodenal injury, base excess, APACHE II score, type of operation, operation time, RTS, associated colon injury, GCS) to be significantly associated with mortality (p<0.05). CONCLUSION: Whenever a surgeon manages a patient with traumatic pancreatic injury, the surgeon needs to consider the predictive risk factors. And, if possible, the patient should undergo a proper and meticulous, less invasive surgical procedure.
		                        		
		                        		
		                        		
		                        			Abbreviated Injury Scale
		                        			;
		                        		
		                        			Abdominal Injuries
		                        			;
		                        		
		                        			APACHE
		                        			;
		                        		
		                        			Blood Transfusion
		                        			;
		                        		
		                        			Colon
		                        			;
		                        		
		                        			Drainage
		                        			;
		                        		
		                        			Glasgow Coma Scale
		                        			;
		                        		
		                        			Hemorrhage
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Injury Severity Score
		                        			;
		                        		
		                        			Laparotomy
		                        			;
		                        		
		                        			Medical Records
		                        			;
		                        		
		                        			Pancreatectomy
		                        			;
		                        		
		                        			Pancreaticoduodenectomy
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Vital Signs
		                        			
		                        		
		                        	
2.Clinical Characteristics of Primary Epiploic Appendagitis.
Young Un CHOI ; Pyong Wha CHOI ; Yong Hwan PARK ; Jae Il KIM ; Tae Gil HEO ; Je Hoon PARK ; Myung Soo LEE ; Chul Nam KIM ; Surk Hyo CHANG ; Jeong Wook SEO
Journal of the Korean Society of Coloproctology 2011;27(3):114-121
		                        		
		                        			
		                        			PURPOSE: Primary epiploic appendagitis (PEA) is a rare cause of an acute abdomen. It can be clinically misdiagnosed as either diverticulitis or appendicitis on clinical examination because the clinical symptoms and signs of PEA are non-specific. The present study was performed to describe the clinical characteristics of PEA and to assess the differences between PEA and diverticulitis. METHODS: We reviewed the clinical records and radiologic findings of 31 consecutive patients with PEA and compared them with those of patients with diverticulitis without complications. RESULTS: In most cases, abdominal pain was localized to the right (13 cases, 41.9%) or left (13 cases, 41.9%) lower quadrants. Gastrointestinal symptoms such as nausea and vomiting were infrequent, and localized tenderness without peritoneal irritation was common. All patients were afebrile, and only 4 patients (12.9%) showed leukocytosis. In all cases except one, a pericolic fatty mass with a hyperattenuated ring was observed on computed tomography. Patients with left PEA were younger than those with diverticulitis (41.4 +/- 11.9 vs. 69.7 +/- 13.3, P < 0.001), and the mean body mass index was higher in patients with left PEA (26.4 +/- 2.9 vs. 22.6 +/- 3.4, P = 0.01). Whereas one patient (6.7%) with left PEA showed leukocytosis, the incidence of leukocytosis in patients with diverticulitis was 80% (8/10) (P < 0.001). CONCLUSION: In patients with an acute abdomen showing localized tenderness without associated symptoms or leukocytosis, a high index of suspicion for PEA is necessary. For correct diagnosis and proper management, it would useful for surgeons to be aware of the computed tomographic findings and the natural course of the disease.
		                        		
		                        		
		                        		
		                        			Abdomen, Acute
		                        			;
		                        		
		                        			Abdominal Pain
		                        			;
		                        		
		                        			Appendicitis
		                        			;
		                        		
		                        			Body Mass Index
		                        			;
		                        		
		                        			Diverticulitis
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Incidence
		                        			;
		                        		
		                        			Leukocytosis
		                        			;
		                        		
		                        			Nausea
		                        			;
		                        		
		                        			Peas
		                        			;
		                        		
		                        			Vomiting
		                        			
		                        		
		                        	
3.Comparison of clinical outcomes and hospital cost between open appendectomy and laparoscopic appendectomy.
Ho Jun LEE ; Yong Hwan PARK ; Jae Il KIM ; Pyong Wha CHOI ; Je Hoon PARK ; Tae Gil HEO ; Myung Soo LEE ; Chul Nam KIM ; Surk Hyo CHANG
Journal of the Korean Surgical Society 2011;81(5):321-325
		                        		
		                        			
		                        			PURPOSE: Laparoscopic appendectomy has been recognized to have many advantages such as greater cosmetic results, less postoperative pain and shorter hospital stays. On the other hand, the cost of laparoscopic procedures is still more expensive than that of open procedures in Korea. The aim of this study is to compare clinical outcomes and hospital costs between open appendectomy and laparoscopic appendectomy. METHODS: Between January 1, 2010 and December 31, 2010, 471 patients were diagnosed with acute appendicitis. Of these, 418 patients met the inclusion criteria and were divided into two groups of open appendectomy (OA) group and laparoscopic appendectomy (LA) group. We analyzed the clinical data and hospital costs. RESULTS: The mean operation time for laparoscopic appendectomy (72.17 minutes) was significantly longer than that of open appendectomy (46.26 minutes) (P = 0.0004). The mean amounts of intravenous analgesics for OA group (2.00 times) was greater than that of LA group (1.86 times) (P < 0.0001). The complication rate was similar between the two groups (OA, 6.99% vs. LA, 10.87%; P = 0.3662). The mean length of postoperative hospital stay was shorter in LA group (OA, 4.55 days vs. LA, 3.60 days; P = 0.0002). The mean total cost covered by the National Health Insurance was more expensive in LA group (OA, 1,259,842 won [Korean monetary unit] vs. LA, 1,664,367 won; P = 0.0057). CONCLUSION: Clinical outcomes of laparoscopic appendectomy were superior to that of open appendectomy even though the cost of laparoscopic appendectomy was more expensive than that of open appendectomy. Whenever surgeons manage a patient with appendicitis, laparoscopic appendectomy should be considered as the procedure of choice.
		                        		
		                        		
		                        		
		                        			Analgesics
		                        			;
		                        		
		                        			Appendectomy
		                        			;
		                        		
		                        			Appendicitis
		                        			;
		                        		
		                        			Cosmetics
		                        			;
		                        		
		                        			Hand
		                        			;
		                        		
		                        			Hospital Costs
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Korea
		                        			;
		                        		
		                        			Length of Stay
		                        			;
		                        		
		                        			National Health Programs
		                        			;
		                        		
		                        			Pain, Postoperative
		                        			
		                        		
		                        	
4.Comparison of clinical outcomes and hospital cost between open appendectomy and laparoscopic appendectomy.
Ho Jun LEE ; Yong Hwan PARK ; Jae Il KIM ; Pyong Wha CHOI ; Je Hoon PARK ; Tae Gil HEO ; Myung Soo LEE ; Chul Nam KIM ; Surk Hyo CHANG
Journal of the Korean Surgical Society 2011;81(5):321-325
		                        		
		                        			
		                        			PURPOSE: Laparoscopic appendectomy has been recognized to have many advantages such as greater cosmetic results, less postoperative pain and shorter hospital stays. On the other hand, the cost of laparoscopic procedures is still more expensive than that of open procedures in Korea. The aim of this study is to compare clinical outcomes and hospital costs between open appendectomy and laparoscopic appendectomy. METHODS: Between January 1, 2010 and December 31, 2010, 471 patients were diagnosed with acute appendicitis. Of these, 418 patients met the inclusion criteria and were divided into two groups of open appendectomy (OA) group and laparoscopic appendectomy (LA) group. We analyzed the clinical data and hospital costs. RESULTS: The mean operation time for laparoscopic appendectomy (72.17 minutes) was significantly longer than that of open appendectomy (46.26 minutes) (P = 0.0004). The mean amounts of intravenous analgesics for OA group (2.00 times) was greater than that of LA group (1.86 times) (P < 0.0001). The complication rate was similar between the two groups (OA, 6.99% vs. LA, 10.87%; P = 0.3662). The mean length of postoperative hospital stay was shorter in LA group (OA, 4.55 days vs. LA, 3.60 days; P = 0.0002). The mean total cost covered by the National Health Insurance was more expensive in LA group (OA, 1,259,842 won [Korean monetary unit] vs. LA, 1,664,367 won; P = 0.0057). CONCLUSION: Clinical outcomes of laparoscopic appendectomy were superior to that of open appendectomy even though the cost of laparoscopic appendectomy was more expensive than that of open appendectomy. Whenever surgeons manage a patient with appendicitis, laparoscopic appendectomy should be considered as the procedure of choice.
		                        		
		                        		
		                        		
		                        			Analgesics
		                        			;
		                        		
		                        			Appendectomy
		                        			;
		                        		
		                        			Appendicitis
		                        			;
		                        		
		                        			Cosmetics
		                        			;
		                        		
		                        			Hand
		                        			;
		                        		
		                        			Hospital Costs
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Korea
		                        			;
		                        		
		                        			Length of Stay
		                        			;
		                        		
		                        			National Health Programs
		                        			;
		                        		
		                        			Pain, Postoperative
		                        			
		                        		
		                        	
5.Clinical Review of Pneumatosis Intestinalis.
Sun Young MIN ; Jae Il KIM ; Pyong Wha CHOI ; Je Hoon PARK ; Tae Gil HEO ; Myung Soo LEE ; Chul Nam KIM ; Surk Hyo CHANG ; Han Seong KIM
Journal of the Korean Surgical Society 2010;79(6):467-473
		                        		
		                        			
		                        			PURPOSE: Pneumatosis intestinalis (PI) is increasingly being detected in recent years with the more frequent use of computerized tomography (CT). The present study was performed to evaluate the clinico-radiologic characteristic presentation of PI and to determine the prognostic factors for mortality. METHODS: Fifteen patients who were diagnosed with PI on CT between June 2000 and May 2010 were retrospectively reviewed. Age, sex, location of PI, presence of portal vein gas, time to diagnosis, American Society of Anesthesiologists (ASA) classification, Acute Physiology And Chronic Health Evaluation II (APACHE II), acidosis, shock, and other associated findings were analyzed for their association with outcome. RESULTS: Fifteen patients (7 males and 8 females, average age, 60.3 years) were diagnosed with PI. Mortality rate was 47% (7 patients). The mortality rate in patients with septic shock, APACHE II score (18), acidosis (pH<7.36) were all 100%, 87%, 100%, respectively (P<0.05). Age, sex, location of PI, portal vein gas, time to diagnosis, ASA classification, associated findings did not show statistical difference. CONCLUSION: Shock, APACHE II score (18) and acidosis were associated with high mortality in patients with PI. So, more intensive management and interest are recommended in patients with shock, APACHE II score (18), and acidosis due to PI.
		                        		
		                        		
		                        		
		                        			Acidosis
		                        			;
		                        		
		                        			APACHE
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Portal Vein
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Shock
		                        			;
		                        		
		                        			Shock, Septic
		                        			
		                        		
		                        	
6.Prognostic Factors for Complication and Mortality of Colonic Perforation.
Keon Hwan PARK ; Pyong Wha CHOI ; Jae Il KIM ; Tae Ho NOH ; Tae Gil HEO ; Je Hoon PARK ; Myung Soo LEE ; Chul Nam KIM ; Surk Hyo CHANG
Journal of the Korean Society of Coloproctology 2009;25(3):143-149
		                        		
		                        			
		                        			PURPOSE: The present study was performed to assess the outcomes in patients with colonic perforation and to determine the prognostic factors for mortality. METHODS: The cases of 42 patients who underwent surgery for colonic perforation between March 1999 and September 2008 were retrospectively reviewed. Age, sex, American Society of Anesthesiologists (ASA) classification, presence of preoperative shock, duration of symptoms, cause of perforation, location of perforation, degree of peritonitis, and the Mannheim Peritonitis Index (MPI) score were analyzed for their association with early outcome by using univariate and multivariate analyses. RESULTS: Diverticulitis (46%, 19 patients) and colorectal cancer (36%, 15 patients) were the most common causes of noniatrogenic colonic perforation, and the sigmoid colon was the most common site of perforation (60%, 25 patients). The postoperative mortality was 21.4% (9 patients). The mortality in patients with preoperative shock, with a MPI score of more than 25, and with Hinchey stage III or IV peritonitis were 70.0%, 57.1%, and 53.3%, respectively (P<0.001). No statistical difference was observed in postoperative mortality with regard to age, sex, ASA classification, duration of symptoms, cause of perforation, and location of perforation. According to the multivariate analysis, preoperative shock proved to be the only significant prognostic factor for mortality (P=0.027) (odds ratio: 19.8, 95% confidence interval: 1.4-276.9). CONCLUSION: Preoperative shock, a MPI score of more than 25, and Hinchey stage III or IV peritonitis were associated with high postoperative mortality in patients with colonic perforation. Especially, more intensive management and interest are required for patient s with preoperative shock due to colonic perforation.
		                        		
		                        		
		                        		
		                        			Colon
		                        			;
		                        		
		                        			Colon, Sigmoid
		                        			;
		                        		
		                        			Colorectal Neoplasms
		                        			;
		                        		
		                        			Diverticulitis
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Multivariate Analysis
		                        			;
		                        		
		                        			Peritonitis
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Shock
		                        			
		                        		
		                        	
7.Colonic Obstruction Caused by Sigmoid Volvulus Combined with a Transomental Hernia: A Case Report.
Pyong Wha CHOI ; Tae Gil HEO ; Je Hoon PARK ; Myung Soo LEE ; Chul Nam KIM ; Surk Hyo CHANG ; Nam Hoon KIM ; Won Ki BAE ; Young Soo MOON
Journal of the Korean Society of Coloproctology 2008;24(3):214-218
		                        		
		                        			
		                        			The case of sigmoid volvulus combined with a transomental hernia is reported. A 70-year-old man was admitted to our hospital with mild abdominal pain and distension. Although no signs of peritoneal irritation were apparent, a plain abdominal X-ray showed a markedly dilated loop of the sigmoid colon, and CT revealed a whirl pattern of the sigmoid mesentery. These findings suggested sigmoid volvulus. Colonoscopic reduction was attempted as an initial nonoperative treatment, and an urgent laparotomy was performed after the reduction failed. The sigmoid loop was herniated through the great omentum, with torsion in the clockwise direction. The colon was manually untwisted in the counter-clockwise direction, and the sigmoid loop was released by dividing the great omentum. During this one-stage operation, intraoperative colonic irrigation, sigmoid resection, and primary anastomosis were performed. The postoperative course was uneventful. Although sigmoid volvulus combined with a transomental hernia is rare, urgent surgical intervention is essential on failure of endoscopic reduction.
		                        		
		                        		
		                        		
		                        			Abdominal Pain
		                        			;
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Colon
		                        			;
		                        		
		                        			Colon, Sigmoid
		                        			;
		                        		
		                        			Hernia
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Intestinal Volvulus
		                        			;
		                        		
		                        			Laparotomy
		                        			;
		                        		
		                        			Mesentery
		                        			;
		                        		
		                        			Omentum
		                        			
		                        		
		                        	
8.Rectal Foreign Body (Glass Cup) Extracted by Laparotomy.
Pyong Wha CHOI ; Jung Min LEE ; Tae Gil HEO ; Je Hoon PARK ; Myung Soo LEE ; Chul Nam KIM ; Surk Hyo CHANG
Journal of the Korean Surgical Society 2008;74(6):448-451
		                        		
		                        			
		                        			Anorectal trauma associated with retained rectal foreign body is an infrequent clinical problem, but presents a challenge to physicians taking care of patients with this problem. We report a case of rectal foreign body (glass cup) extracted by laparotomy. A 49-year-old male with a history of alcoholism presented to the emergency room four days after inserting a glass cup into his rectum. He complained of vague anal pain and failure to pass flatus or stool for four days. He had attempted to extract the glass cup using various methods (digital, instrumental manipulation, enema), none of which was successful. Computed tomography revealed a glass cup lodged in the rectum, without complication. The patient was brought to the operating room, administered spinal anesthesia, and placed in lithotomy position after failure of extraction in the emergency room. Although the object was palpable, it could not be extracted either manually or by the use of forceps. We decided to perform an emergent laparotomy under general anesthesia. After the abdomen was opened, an attempt was made to milk the object toward the distal rectum. However, this proved to be impossible secondary to severe rectal mucosal edema. The glass cup was eventually extracted through performing a colotomy at the rectosigmoid junction, with primary repair. The patient's postoperative course was uneventful, and he was discharged on the eighth postoperative day.
		                        		
		                        		
		                        		
		                        			Abdomen
		                        			;
		                        		
		                        			Alcoholism
		                        			;
		                        		
		                        			Anesthesia, General
		                        			;
		                        		
		                        			Anesthesia, Spinal
		                        			;
		                        		
		                        			Edema
		                        			;
		                        		
		                        			Emergencies
		                        			;
		                        		
		                        			Flatulence
		                        			;
		                        		
		                        			Foreign Bodies
		                        			;
		                        		
		                        			Glass
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Laparotomy
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Milk
		                        			;
		                        		
		                        			Operating Rooms
		                        			;
		                        		
		                        			Rectum
		                        			;
		                        		
		                        			Surgical Instruments
		                        			
		                        		
		                        	
9.Skeletal Muscle Metastasis from Colorectal Cancer: Report of a Case.
Pyong Wha CHOI ; Chul Nam KIM ; Han Seong KIM ; Jung Min LEE ; Tae Gil HEO ; Je Hoon PARK ; Myung Soo LEE ; Surk Hyo CHANG
Journal of the Korean Society of Coloproctology 2008;24(6):492-496
		                        		
		                        			
		                        			Metastases from colorectal cancer can occur by either lymphatic or hematogenous spread, and the sites most commonly involved are the liver and lung. Although skeletal muscle comprises a considerable portion of body mass and receives abundant blood supply, it is one of the most unusual sites of metastasis from any malignancies. We report a case of skeletal muscle metastasis from colorectal cancer. An 83-year-old female patient presented with a painful mass in the right posterior thigh. She had already undergone low anterior resection and right lobectomy of liver for rectal cancer with liver metastasis (T2N1M1) about 4 years ago. Although a follow-up computed tomography scan showed a metastatic solitary pulmonary nodule in the left lobe 2 years after the primary operation, she refused further aggressive treatment. Magnetic resonance imaging showed a localized mass in the semimembranosus muscle of the right thigh, and fine-needle aspiration cytology demonstrated clusters of atypical cells compatible with adenocarcinoma. The patient underwent excision of the painful mass located in the right semimembranosus muscle. Histologically, the thigh mass proved to be adenocarcinoma identical to the primary lesion. The patient died of heart failure on the 2nd postoperative day.
		                        		
		                        		
		                        		
		                        			Adenocarcinoma
		                        			;
		                        		
		                        			Aged, 80 and over
		                        			;
		                        		
		                        			Biopsy, Fine-Needle
		                        			;
		                        		
		                        			Colorectal Neoplasms
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Follow-Up Studies
		                        			;
		                        		
		                        			Heart Failure
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Liver
		                        			;
		                        		
		                        			Lung
		                        			;
		                        		
		                        			Magnetic Resonance Imaging
		                        			;
		                        		
		                        			Muscle, Skeletal
		                        			;
		                        		
		                        			Muscles
		                        			;
		                        		
		                        			Neoplasm Metastasis
		                        			;
		                        		
		                        			Rectal Neoplasms
		                        			;
		                        		
		                        			Solitary Pulmonary Nodule
		                        			;
		                        		
		                        			Thigh
		                        			
		                        		
		                        	
10.Clinical Analysis of 473 Cases of Inguinal Hernia in Adult Patients.
Sung Won JUNG ; Tae Gil HEO ; Jung Min LEE ; Pyong Wha CHOI ; Je Hoon PARK ; Myung Soo LEE ; Chul Nam KIM ; Surk Hyo CHANG
Journal of the Korean Surgical Society 2008;75(2):109-115
		                        		
		                        			
		                        			PURPOSE: This article compares the results of various methods of inguinal hernia repair in adults. METHODS: We retrospectively reviewed the medical records of 473 patients over 20 years of age who received an inguinal hernia repair procedure between January 2000 and June 2007. We analyzed the patients' clinical factors and outcomes, dividing them into five groups according to method of repair: Bassini group, Lichtenstein group, mesh plug group, Prolene Hernia System (PHS) group, and laparoscopic group. RESULTS: The mean number of used analgesics was significantly smaller in the PHS group than in other groups (P<0.05, PHS group: 0.46, Bassini group: 1.55, Lichtenstein group: 1.20, mesh plug group: 0.82, laparoscopic group: 1.44). The mean operation time was significantly shorter in the PHS group than in the other groups (P<0.05, PHS group: 45.18 min, Bassini group: 59.85 min, Lichtenstein group: 68.20 min, mesh plug group: 66.73 min, laparoscopic group: 83.33 min). Finally, the mean postoperative hospital staywas significantly shorter in the PHS group than in the other groups (P<0.05, PHS group: 2.93 day, Bassini group: 4.96 day, Lichtenstein group: 4.17 day, mesh plug group: 4.01 day, laparoscopic group: 5.11 day). Out of five groups, there was onecase of postoperative recurrence in the Bassini group. CONCLUSION: Mesh PHS operation is a more preferred method of inguinal hernia repair in adults because it offers a lower postoperative pain, shorter operation time, shorter postoperative hospital stay.
		                        		
		                        		
		                        		
		                        			Adult
		                        			;
		                        		
		                        			Analgesics
		                        			;
		                        		
		                        			Hernia
		                        			;
		                        		
		                        			Hernia, Inguinal
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Hydrogen-Ion Concentration
		                        			;
		                        		
		                        			Length of Stay
		                        			;
		                        		
		                        			Medical Records
		                        			;
		                        		
		                        			Pain, Postoperative
		                        			;
		                        		
		                        			Polypropylenes
		                        			;
		                        		
		                        			Recurrence
		                        			;
		                        		
		                        			Retrospective Studies
		                        			
		                        		
		                        	
            
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