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De Freitas Junior W.R.,Gastric Surgery Division | Ilias E.J.,Gastric Surgery Division | Kassab P.,Gastric Surgery Division | Cordts R.,Gastric Surgery Division | And 7 more authors.
The Scientific World Journal | Year: 2014

Background. Bariatric surgery is considered an effective option for the management of morbid obesity. The incidence of obesity has been gradually increasing all over the world reaching epidemic proportions in some regions of the world. Obesity can cause a reduction of up to 22% in the life expectancy of morbidly obese patients. Objective. The objective of this paper is to assess the weight loss associated with the first 6 months after bariatric surgery using bioelectric impedance analysis (BIA) for the evaluation of fat mass and fat-free mass. Method. A total of 36 morbidly obese patients were subjected to open gastric bypass surgery. The patients weight was monitored before and after the procedure using the bioelectric impedance analysis. Results. Bariatric surgery resulted in an average percentage of weight loss of 28.6% (40 kg) as determined 6 months after the procedure was performed. Analysis of the different components of body weight indicated an undesirable loss of fat-free mass along with the reduction of total body weight. Conclusion. Open gastric bypass induced a significant loss of total weight and loss of fat-free mass in patients six months after the surgery. The use of bioelectric impedance analysis resulted in an appropriate estimation of the total weight components in individuals subjected to bariatric surgery allowing a more real analysis of the variation of weight after the surgery. © 2014 Wilson Rodrigues de Freitas Junior et al. Source

Ishida M.,Gastric Surgery Division | Sekine S.,National Cancer Center Research Institute | Fukagawa T.,Gastric Surgery Division | Ohashi M.,Gastric Surgery Division | And 5 more authors.
American Journal of Surgical Pathology | Year: 2013

Neuroendocrine carcinoma (NEC) of the stomach has been recognized as a highly malignant tumor; however, because of its rarity, limited information is available regarding its clinicopathologic characteristics. Here, we investigated the morphologic and immunohistochemical features and prognosis of 51 cases of gastric NEC. Histologically, 40 lesions were large cell type, and 11 were small cell type. The large majority of the tumors exhibited a solid growth pattern (94%), with subsets of tumors showing trabecular (18%), scirrhous (10%), or tubular growth patterns (6%). Thirty-six cases (71%) had adenocarcinoma components and/or dysplasia. Among them, 26 cases (51%) were associated with intramucosal adenocarcinoma or dysplasia. Immunohistochemically, synaptophysin, chromogranin A, and CD56 were diffusely expressed in 48 (94%), 44 (86%), and 24 cases (47%), respectively. Two recently reported neuroendocrine markers, ASH1 and NKX2.2, were diffusely positive in 12 (24%) and 17 cases (33%), respectively. The diffuse or focal expression of TTF-1 was observed in 19 cases (37%). Among the 41 patients who underwent a curative resection, 16 patients (39%) developed radiologic recurrences, and the liver was the most frequent site of recurrence (11 patients, 27%). The 3- and 5-year overall survival rates were 57.8% and 44.7%, respectively. Regarding patient outcome, none of the histologic subclassifications, including small cell versus large cell types and the presence versus the absence of adenocarcinoma components and/or dysplasia, were significant. In a multivariate analysis, curative surgery was identified as the sole independent prognostic factor (P=0.03). Although gastric NECs exhibit significant morphologic diversity, their histologic subclassification is unlikely to be of immediate clinical relevance. © 2013 Lippincott Williams and Wilkins. Source

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