Clinical significance of pancreatic intraepithelial neoplasia in resectable pancreatic cancer on survivals

PURPOSE: Noninvasive precursor lesions for pancreatic adenocarcinoma include pancreatic intraepithelial neoplasia (PanIN), intraductal papillary mucinous neoplasm, and mucinous cystic neoplasm. PanIN is often found synchronously adjacent to resected pancreatic ductal adenocarcinoma (PDAC) tumors. However, its prognostic significance on outcome after PDAC resection is unknown. The purpose of the current study was to determine if the presence of PanIN has a prognostic or predictive effect on survival after resection for PDAC with curative intent. METHODS: We retrospectively reviewed the clinicopathologic data of patients who underwent pancreatectomy for PDAC from January 2002 to January 2013. Intraductal papillary mucinous lesions and mucinous cystic neoplasms were excluded. All available postoperative imaging and clinical follow-up data were reviewed. RESULTS: There were 95 patients who underwent pancreatectomy. Tumors were most commonly located in the pancreas head and as such pancreaticoduodenectomy was the most commonly performed operation. The median tumor size was 3.2 cm. An absence of PanIN lesions was identified in 39 patients (41%). Of the patients with PanIN lesions, high-grade PanIN (grade 3) was the most common type (64.3%) followed by grade 2 (28.6%). There was no significant difference in overall survival or disease-free survival between the non-PanIN and PanIN groups. CONCLUSION: The presence or absence of PanIN lesions did not affect survival in patients undergoing resection for pancreatic cancer. However, patients with high-grade PanINs tended to have better overall survival. Larger studies with longer follow up are needed to accurately determine its clinical significance.

The Feasibility of Fundal Retraction of the Gallbladder in the Single Port Laparoscopic Cholecystectomy: Comparison between a 4-instrument Fundal Retraction Group and a 3-instrument Group

PURPOSE: Owing to the accumulation of surgical experience, the indications of single port laparoscopic cholecystectomy (SLC) have increased. To overcome the difficulties and limitations of SLC, we included an additional instrument for use in retracting the gallbladder fundus. The aim of this study was to investigate the feasibility of 4-instrument fundal retraction SLC. METHODS: We retrospectively analyzed 134 patients who had undergone SLC for benign gallbladder disease. We compared the clinical outcome between patients who had undergone SLC without fundal retraction (3-instrument SLC, n=102) and those who had undergone SLC with fundal retraction (4-instrument fundal retraction SLC, n=32). RESULTS: Of 134 patients, 47 were male and 87 were female. A significantly higher proportion of patients in the 4-instrument fundal retraction group had gallbladder distention and wall thickening than patients in the 3-instrument SLC group. No statistically significant difference in the incidence of pericholecystic inflammation, adhesion, and gallbladder perforation; duration of operation, the incidence of complications, and duration of postoperative hospital stay was observed between the two groups. In univariate analysis to perform 4-instrument fundal retraction SLC, higher BMI, the presence of gallbladder distension, and wall thickening were significant factors. In multivariate analysis, gallbladder distention and the presence of concurrent operation during SLC were independently significant factors for performing 4-instrument fundal retraction SLC. CONCLUSION: Four-instrument fundal retraction SLC is a feasible and safe surgical procedure, particularly in patients with a high BMI, gallbladder distention, wall thickening, inflammation, or adhesions. If difficulties are encountered during 3-instrument SLC, simple fundal retraction using an additional instrument may be the preferred option prior to converting the operation to conventional laparoscopic cholecystectomy.

Practical Guidelines for the Surgical Treatment of Gallbladder Cancer

At present, surgical treatment is the only curative option for gallbladder (GB) cancer. Many efforts therefore have been made to improve resectability and the survival rate. However, GB cancer has a low incidence, and no randomized, controlled trials have been conducted to establish the optimal treatment modalities. The present guidelines include recent recommendations based on current understanding and highlight controversial issues that require further research. For T1a GB cancer, the optimal treatment modality is simple cholecystectomy, which can be carried out as either a laparotomy or a laparoscopic surgery. For T1b GB cancer, either simple or an extended cholecystectomy is appropriate. An extended cholecystectomy is generally recommended for patients with GB cancer at stage T2 or above. In extended cholecystectomy, a wedge resection of the GB bed or a segmentectomy IVb/V can be performed and the optimal extent of lymph node dissection should include the cystic duct lymph node, the common bile duct lymph node, the lymph nodes around the hepatoduodenal ligament (the hepatic artery and portal vein lymph nodes), and the posterior superior pancreaticoduodenal lymph node. Depending on patient status and disease severity, surgeons may decide to perform palliative surgeries.

Critical Reappraisal of Cholecystectomy in Patients with Asymptomatic Gallstones for Early Diagnosis and Removal of Dysplasia and Cancer / 대한소화기학회지

BACKGROUND/AIMS: It has been known that chronic trauma and inflammation of gallbladder (GB) mucosa by gallstones (GS) can induce epithelial dysplasia, carcinoma in situ, and invasive cancer. This study was designed to investigate the usefulness of cholecystectomy in patients with asymptomatic GS for the early diagnosis and removal of dysplasia or cancer. METHODS: From January 2004 to July 2008, the clinical records of 703 cases with GS who underwent cholecystectomy at Korea University Guro Hospital were reviewed, and the prevalence of dysplasia and cancer was analyzed. RESULTS: In symptomatic GS (542 cases) group, low grade dysplasia was found in 4 cases (0.74%) and high grade dysplasia in 1 case (0.18%). In asymptomatic GS (161 cases) group, low grade dysplasia was found in 4 cases (2.48%) and cancer in 2 cases (1.24%) (p=0.012 vs. symptomatic cases). Dysplasias in symptomatic GS group were not associated with polyps, but dysplasias and cancers in asymptomatic GS group were associated. Patients with asymptomatic GS and polyps were analyzed according to the size of polyps. In those (12 cases) with larger polyps (> or =1 cm), low grade dysplasia was found in 2 cases and cancer in 2 cases. And in those (12 cases) with smaller polyps (<1 cm), low grade dysplasia was found in 2 cases. CONCLUSIONS: Extending indication of prophylactic cholecystectomy in patients with asymptomatic GS without polyp to prevent GB dysplasia or cancer beyond the existing indication does not seem to be justifiable in Korea. However, further studies are needed in patients with asymptomatic GS and polyp of any size.

Critical Reappraisal of Cholecystectomy in Patients with Asymptomatic Gallstones for Early Diagnosis and Removal of Dysplasia and Cancer / 대한소화기학회지

BACKGROUND/AIMS: It has been known that chronic trauma and inflammation of gallbladder (GB) mucosa by gallstones (GS) can induce epithelial dysplasia, carcinoma in situ, and invasive cancer. This study was designed to investigate the usefulness of cholecystectomy in patients with asymptomatic GS for the early diagnosis and removal of dysplasia or cancer. METHODS: From January 2004 to July 2008, the clinical records of 703 cases with GS who underwent cholecystectomy at Korea University Guro Hospital were reviewed, and the prevalence of dysplasia and cancer was analyzed. RESULTS: In symptomatic GS (542 cases) group, low grade dysplasia was found in 4 cases (0.74%) and high grade dysplasia in 1 case (0.18%). In asymptomatic GS (161 cases) group, low grade dysplasia was found in 4 cases (2.48%) and cancer in 2 cases (1.24%) (p=0.012 vs. symptomatic cases). Dysplasias in symptomatic GS group were not associated with polyps, but dysplasias and cancers in asymptomatic GS group were associated. Patients with asymptomatic GS and polyps were analyzed according to the size of polyps. In those (12 cases) with larger polyps (> or =1 cm), low grade dysplasia was found in 2 cases and cancer in 2 cases. And in those (12 cases) with smaller polyps (<1 cm), low grade dysplasia was found in 2 cases. CONCLUSIONS: Extending indication of prophylactic cholecystectomy in patients with asymptomatic GS without polyp to prevent GB dysplasia or cancer beyond the existing indication does not seem to be justifiable in Korea. However, further studies are needed in patients with asymptomatic GS and polyp of any size.

Assessment of implant stability after immediate loading in dogs : clinical and radiographic study

0.05) and marginal bone loss(p>0.05). Finally, implant stability after immediate loading was similar to delay loading implant.

Mesenteric Castleman's Disease

We report here a rare case of mesenteric Castleman's disease presenting as a mesenteric mass. A 13-year-old female child was admitted to our hospital complaining of intermittent vague abdominal pain. She had hypochromic anemia, thrombocytosis and an elevated erythrocyte sedimentation rate (ESR). Ultrasonography and computed tomography indicated an intra- abdominal mass might represent a lymphoma or gastrointestinal stromal tumor or leiomyoma, but the definitive preoperative diagnosis couldn't be confirmed. The surgical resection of the mass revealed the mesenteric hyaline vascular- type Castleman's disease.

Factors Associated with Morbidity and Mortality in Distal Pancreatectomy

PURPOSE: A pancreatic leak is a major source of morbidity associated with pancreatic surgery. A review of the indication for distal pancreatectomy and the disease and technique dependent factors associated with morbidity and mortality after this procedure were sought. METHODS: A retrospective analysis of the hospital records of all patients having undergone a distal pancreatectomy between January 1998 and December 2002 was prformed. The clinical, technical and pathological data were correlated with the operative morbidity or mortality. RESULTS: 95 patients had undergone a distal pancreatectomy. The male to female ratio of our series was 2.3 to 1, with a mean age of 54.2 years. 38 patients underwent the distal pancreatectomy for an intrapancreatic disease and 57 for an extrapancreatic disease, with a curative resection for stomach cancer the most common indication (47.4%). The clinicopathological and technical factors included the urgency of the operation, presence or absence of malignancy in the resected pancreas, method of pancreatic stump closure (suture vs. stapled) and the presence of a concomitant splenectomy. The morbidity and mortality rates were 27.3 and 2%, respectively. The postoperative complications included pancreatic fistula, intraabdominal abscess and wound infection among others. There were no factors significantly associated with the development of postoperative complications, especially pancreatic leakage. CONCLUSION: A distal pancreatectomy can be performed for a variety of benign and malignant conditions, with a low rate of mortality, although a pancreatic leak can be a serious cause of morbidity. The morbidity and pancreatic leakage rates in our study were 27.3 and 9.4%, respectively, but as there were no clinical or technical factors associated with pancreatic leakage in this retrospective analysis, it is propose that a prospective trial should be performed.

Tumoral Calcinosis in Inguinal Region

A tumoral calcinosis is considered a rare disorder with a poorly understood etiology. This uncommon soft tissue calcification is characterized clinically by the presence of an irregular, painless, periarticular soft tissue calcifying mass. People from African decent are mainly affected with the disease, which typically occurs in the periarticular regions. We report a case of a middle aged woman who complained a left inguinal subcutaneous mass. The characteristic clinical features, radiological and pathological findings are described. A diagnosis of a tumoral calcinosis can be difficult to make due to the unfailiarity of its clinical and radiological features. This presented report will help surgeons to easily diagnose this condition.

Minimum Number of Retrieved Lymph Nodes for Staging in Gastric Cancer

PURPOSE: The lymph node (N) classification in the International Union Against Cancer (UICC) TNM staging system for gastric adenocarcinomas has been revised from the anatomic sites of metastatic lymph nodes to the number of metastatic lymph nodes. The purpose of this study was to investigate the proper number of retrieved lymph nodes for applying the new TNM staging system. MATENRIALS AND METHODS: We retrospectively studied 267 patients who had undergone a curative resection performed by one surgeon for gastric adenocarcinomas from March 1993 to December 1996 at Korea University Guro Hospital. We compared the old staging system to the new one and analyzed the number of retrieved and metastatic lymph nodes. We also analyzed the number of retrieved and metastatic lymph nodes according to the operative procedure and the extent of the lymphadenectomy, as well as the correlation of lymph-node metastasis to the number of retrieved lymph nodes. RESULTS: The mean number of retrieved lymph nodes was 34.27+/-14.18, of those 6.85+/-6.24 were metastatic. According to the extent of the lymphadenectomy, these numbers were 17.8+/-9.3 and 7.0+/-5.3 in D1, 33.1+/-14.6 and 3.0+/-3.0 in D1+alpha, 33.9+/-13.8 and 7.5+/-6.2 in D2, and 40.6+/-13.3 and 7.9+/-7.5 in D2+alpha. There was no correlation between the percentage of the specimen with positive lymph nodes and the number of retrieved lymph nodes, but a logistic regres sion analysis showed that the probability of lymph-node metastasis increased as the number of retrieved lymph nodes increased. CONCLUSION: The mean number of retrieved lymph nodes was about 34. Although by logistic regression analysis, the probability of lymph-node metastasis increased as the number of retrieved lymph nodes increased, we failed to determine the minimum number of nodes retrieved during a lymphadenectomy needed for accurate staging in a gastric adenocarcinoma. Further study is required to identify the optimum number of lymph nodes that need to be retrieved.

Minimum Number of Retrieved Lymph Nodes for Staging in Gastric Cancer

PURPOSE: The lymph node (N) classification in the International Union Against Cancer (UICC) TNM staging system for gastric adenocarcinomas has been revised from the anatomic sites of metastatic lymph nodes to the number of metastatic lymph nodes. The purpose of this study was to investigate the proper number of retrieved lymph nodes for applying the new TNM staging system. MATENRIALS AND METHODS: We retrospectively studied 267 patients who had undergone a curative resection performed by one surgeon for gastric adenocarcinomas from March 1993 to December 1996 at Korea University Guro Hospital. We compared the old staging system to the new one and analyzed the number of retrieved and metastatic lymph nodes. We also analyzed the number of retrieved and metastatic lymph nodes according to the operative procedure and the extent of the lymphadenectomy, as well as the correlation of lymph-node metastasis to the number of retrieved lymph nodes. RESULTS: The mean number of retrieved lymph nodes was 34.27+/-14.18, of those 6.85+/-6.24 were metastatic. According to the extent of the lymphadenectomy, these numbers were 17.8+/-9.3 and 7.0+/-5.3 in D1, 33.1+/-14.6 and 3.0+/-3.0 in D1+alpha, 33.9+/-13.8 and 7.5+/-6.2 in D2, and 40.6+/-13.3 and 7.9+/-7.5 in D2+alpha. There was no correlation between the percentage of the specimen with positive lymph nodes and the number of retrieved lymph nodes, but a logistic regres sion analysis showed that the probability of lymph-node metastasis increased as the number of retrieved lymph nodes increased. CONCLUSION: The mean number of retrieved lymph nodes was about 34. Although by logistic regression analysis, the probability of lymph-node metastasis increased as the number of retrieved lymph nodes increased, we failed to determine the minimum number of nodes retrieved during a lymphadenectomy needed for accurate staging in a gastric adenocarcinoma. Further study is required to identify the optimum number of lymph nodes that need to be retrieved.

The Prognostic Significance of Intratumoral Natural Killer Cells in Colorectal Cancer

PURPOSE: Natural killer (NK) cells have a spontaneous cytotoxic capacity against tumor cells. NK cell infiltration is known to be related to the prognosis of colorectal cancer, but their prognostic significance has not been determined. The purpose of this study was to determine the prognostic importance of NK cell infiltration in colorectal cancer. METHODS: Ninety-one patients, diagnosed with colorectal cancer, between Jan. 1994 to Dec. 1995, and consequently operated on at the Department of surgery, Korea University college of medicine, were retrospectively reviewed. Immunohistochemical stains were performed for NK cells using the monoclonal antibody CD57 (IOT-10; 1: 50 diluted; Chemicon, Temccula, U.S.A.). The intratumoral CD57 expressions were divided into 4 grades. Intensity 0 was defined as a total absence of CD57 expression in the tumor cells, Intensities 1+, 2+ and 3+ were defined as less than 25, 25~50 and more than 50% expression, respectively. Consecutively, intensities 0, 1+ and 2+ were regarded as low CD57 expression, with 3 regarded as high CD57 expression. The clinical characteristics, 5-year survival rates and recurrence rates by stage, according to the CD57 expression, were then analyzed. RESULTS: Patients with high CD57 expression showed better survival rates and lower recurrence rates than those with low CD57 expressions (77.8 versus 53.4% and 14.8 versus 25.0%, respectively, P=0.0856). According to stage, the patient with high CD57 expressions showed better survival rates than those with low CD57 expressions in stages II and III (76.4 versus 69.9% [P=0.6802] and 66.7 versus 40.0% [P=0.4496], respectively). CONCLUSION: Although there was not statistical significance, these data suggest that high intratumoral infiltration of NK cells, as determined by the CD57 expression, seems to be a favorable prognostic factor in colorectal cancer, although further study will be needed.

The Effect of Anti ICAM-1 Antibody in the Rat Kidney Preserved in the Cold University of Wisconsin Solution / 대한이식학회지

PURPOSE: The cold ischemia augments the inflammatory cell infiltration in the rat kidney allograft by increasing expression of ICAM-1. The ICAM-1 proteins and ICAM-1 mRNA were overexpressed and upregulated on the tubular epithelium and endothelium of renal allografts that were preserved in the cold preservation solution such as University of Wisconsin (UW) solution. The aims of this study was to examine whether perfusion of kidney with anti ICAM-1 antibody (1A29) prevent inflammations and injuries of graft even in long ischemic time. METHODS: Rat kidneys were perfused in situ with 60 mL of cold UW solution without or with anti-rat ICAM-1 antibody and nephrectomized. The kidneys were exposed to 48 hour cold (4 degrees C storage time) ischemia and examined for the counts of necrotic tubules and apoptotic cells on the high power fields by terminal deoxynucleotidyltransferase mediated nick-end labeling (TUNEL) assay. RESULTS: The number of necrotic tubules per high power field of the allograft treated by anti ICAM-1antibody (6.97+/-4.25) was significantly less than that of the other control allograft (12.71+/-6.42) (P<0.001). The number of apoptotic cells per high power field of antibody treated graft (4.27+/-4.11) was significantly less than that of the other control graft (8.43+/-5.56) (P<0.001). CONCLUSION: Rat anti ICAM-1 antibody (1A29) inhibits ICAM-1 mediated allograft tubular necrosis as well as apoptosis. These results are expected to contribute to prevent allograft rejection and delayed graft function when used for pretreatment of allografts with anti ICAM-1 antibody mixtures of the perfusion and preserving solution clinically.

Distribution and Prognostic Effect on Adjuvant Hormone Therapy of Body Mass Index (BMI) in Korean Breast Cancer Patients

PURPOSE: Obesity has been shown to have important effects related to breast cancer. But there have been few data available on the distribution of body mass index (BMI) among Korean breast cancer patients and on the effects of this distribution on patient prognosis. Therefore we investigated the BMI distribution of Korean breast cancer patient's and its relationship with other tumor markers, in order to elucidate the relationship between BMI and patient prognosis. METHODS: We measured the BMI of 266 Korean adult women with breast carcinoma.and divided the subjects into the following subgroups according to BMI; low body weight (BMIor=25). We compared this distribution with that of the general Korean women's population. and investigated the correlation with other prognostic factors and tumor markers. The 5 year overall and disease free survival rates were evaluated for both the total breast cancer patients and the adjuvant hormone treated breast cancer patients, according to BMI subgroup, using the Kaplan-Meier method. RESULTS: Mean BMI for the breast patients was 23.4+/-3.1, and did not differ from that of the general Korean adult women's population ('1994 National Nutrition Survey Report). BMI increased with increasing age and was highest in the 60~69 yr age group. BMI was correlated with tumor size and stage. The survival rates were low in the high BMI group among both total and adjuvant hormone treated breast cancer patients, but in neither was any statistical difference found between BMI subgroups. CONCLUSION: Korean breast cancer patients are not obese as the general population and their BMI increases with increasing age and menopausal status. There was a tendency for higher BMI to be associated with poorer prognosis, although not to a statistically significant degree.

Distribution and Prognostic Effect on Adjuvant Hormone Therapy of Body Mass Index (BMI) in Korean Breast Cancer Patients / 한국유방암학회지

PURPOSE: Obesity has been shown to have important effects related to breast cancer. But there have been few data available on the distribution of body mass index (BMI) among Korean breast cancer patients and on the effects of this distribution on patient prognosis. Therefore we investigated the BMI distribution of Korean breast cancer patient's and its relationship with other tumor markers, in order to elucidate the relationship between BMI and patient prognosis. METHODS: We measured the BMI of 266 Korean adult women with breast carcinoma.and divided the subjects into the following subgroups according to BMI; low body weight (BMI or25). We compared this distribution with that of the general Korean women's population. and investigated the correlation with other prognostic factors and tumor markers. The 5 year overall and disease free survival rates were evaluated for both the total breast cancer patients and the adjuvant hormone treated breast cancer patients, according to BMI subgroup, using the Kaplan-Meier method. RESULTS: Mean BMI for the breast patients was 23.4+/-3.1, and did not differ from that of the general Korean adult women's population ('1994 National Nutrition Survey Report).BMI increased with increasing age and was highest in the 60~69 yr age group. BMI was correlated with tumor size and stage. The survival rates were low in the high BMI group among both total and adjuvant hormone treated breast cancer patients, but in neither was any statistical difference found between BMI subgroups. CONCLUSION: Korean breast cancer patients are not obese as the general population and their BMI increases with increasing age and menopausal status. There was a tendency for higher BMI to be associated with poorer prognosis, although not to a statistically significant degree.