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To assess which type of preoperative dietary strategy is most effective in reducing liver volume and assessing its influence on different biochemical parameters and on surgical complications in individuals undergoing bariatric surgery. Parallel randomized trial comparing the effect of a very low calorie diet (VLCD) and a low calorie diet (LCD) for a period of 21 days before surgery on hepatic volume, anthropometric and biochemical parameters. Compliance and tolerance to the diets, surgical complications, and hospital stay were also determined. Eighty-six morbid obese participants undergoing bariatric surgery were randomized. The hepatic volume was significantly reduced in both intervention groups, but no differences in changes between groups were detected. The reduction in the hepatic volume was higher in those patients with a baseline hepatic volume > 3 L compared to those with

To assess which type of preoperative dietary strategy is most effective in reducing liver volume and assessing its influence on different biochemical parameters and on surgical complications in individuals undergoing bariatric surgery.Parallel randomized trial comparing the effect of a very low calorie diet (VLCD) and a low calorie diet (LCD) for a period of 21 days before surgery on hepatic volume, anthropometric and biochemical parameters. Compliance and tolerance to the diets, surgical complications, and hospital stay were also determined.Eighty-six morbid obese participants undergoing bariatric surgery were randomized. The hepatic volume was significantly reduced in both intervention groups, but no differences in changes between groups were detected. The reduction in the hepatic volume was higher in those patients with a baseline hepatic volume 3 L compared to those with 3 L (adjusted P value 0.001). The percentages of total weight lost were 5.8 and 4.2% (adjusted P value = 0.004) for participants on the VLCD and LCD, respectively. There were no differences between groups for any of the biochemical parameters analyzed, nor in the number of surgical complications nor the length of hospital stay. Adherence to the diet was good; nevertheless, participants in the VLCD intervention showed worse tolerance.In subjects with morbid obesity undergoing bariatric surgery, compared to a LCD, a preoperative 21-day intervention with VLCD is more effective in terms of reducing total body weight but not in terms of reducing the liver volume. Both types of preoperative diets have similar effects on clinical biochemical parameters, rate of surgical complications, and hospital length stay.

Resumen: Introducción: El principal pilar del tratamiento de la obesidad infantil es la promoción de cambios conductuales, especialmente difíciles durante la adolescencia. Este trabajo propone y evalúa un nuevo protocolo terapéutico de base motivacional, estructurado en objetivos, aplicable desde una consulta pediátrica. Pacientes y métodos: Se estudió a 110 adolescentes obesos. El protocolo terapéutico constaba de 12 visitas mensuales, en 2 fases: motivacional y de intervención, en las que se proponían cambios y se pactaban objetivos, que fueron evaluados en términos de dificultades y logros. Se midieron el peso y la talla en cada visita, y la presión arterial, el perímetro de cintura, la glucosa, la insulina y el perfil lipídico al inicio y al final. Resultados: Se produjo una reducción media de 0,5 SDS del IMC z-score en los adolescentes que finalizaron la intervención (78,2%), esta disminución fue de 0,8 SDS en el grupo de pacientes con buena respuesta al tratamiento (75,6%). Este grupo bajó de forma significativa el colesterol total, LDL, triglicéridos, insulina e índice HOMA. El principal factor pronóstico de buena respuesta fue el éxito en la fase motivacional con un valor predictivo positivo del 95% (83-98%). Conclusiones: Los descensos en el IMC z-score y el control de los parámetros antropométricos y bioquímicos sitúan a OBEMAT como un método altamente eficaz entre los publicados anteriormente. La respuesta a la fase motivacional determina en gran medida el éxito o el fracaso de la intervención. Abstract: Introduction: The mainstay of the treatment of childhood obesity is the promotion of behavioural changes, which are especially difficult during adolescence. This paper proposes and evaluates a new motivation-based therapeutic protocol, structured in objectives, which is applicable from paediatric practice. Patients and methods: A total of 110 obese adolescents were studied. The therapeutic protocol consisted of 12 monthly visits, in two phases: Motivational and Interventional, in which changes were proposed and objectives were agreed, and later evaluated taking into account the difficulties and achievements. Weight and height was measured in each visit, and blood pressure, waist circumference, glucose, insulin and lipid profile were measured at the beginning and at the end. Results: There was a mean decrease of 0.5 SDS in BMI z-score in the adolescents who completed the intervention (78.2%), with this decrease being 0.8 SDS in the group of patients with good response to treatment (75.6%). This group had a significantly lower total cholesterol, LDL, triglycerides, insulin and HOMA index. The main predictor of good response was the success of the motivational phase, with a positive predictive value of 95% (83-98%). Conclusions: BMI z-score decreases and the control of anthropometric and biochemical parameters, show that OBEMAT is a highly effective method compared to those published previously. The response to the motivational phase largely determines the success or failure of the intervention.

The mainstay of the treatment of childhood obesity is the promotion of behavioural changes, which are especially difficult during adolescence. This paper proposes and evaluates a new motivation-based therapeutic protocol, structured in objectives, which is applicable from paediatric practice.A total of 110 obese adolescents were studied. The therapeutic protocol consisted of 12 monthly visits, in two phases: Motivational and Interventional, in which changes were proposed and objectives were agreed, and later evaluated taking into account the difficulties and achievements. Weight and height was measured in each visit, and blood pressure, waist circumference, glucose, insulin and lipid profile were measured at the beginning and at the end.There was a mean decrease of 0.5 SDS in BMI z-score in the adolescents who completed the intervention (78.2%), with this decrease being 0.8 SDS in the group of patients with good response to treatment (75.6%). This group had a significantly lower total cholesterol, LDL, triglycerides, insulin and HOMA index. The main predictor of good response was the success of the motivational phase, with a positive predictive value of 95% (83-98%).BMI z-score decreases and the control of anthropometric and biochemical parameters, show that OBEMAT is a highly effective method compared to those published previously. The response to the motivational phase largely determines the success or failure of the intervention.

Background: Gastrointestinal stromal tumours (GISTs) are rare. Few cases of such tumours are reported in the literature. Until recently, they were only treated surgically but, nowadays, for high grade tumours, we can consider wide excision, not only as a palliative measure, but also to enable subsequent treatment with Imatinib mesylate. Methods: We describe the case of a patient with a high-grade GIST, who, two years after undergoing surgery and medical treatment, is still in remission. Computerised axial tomography (CT) of the abdomen detected the presence of multiple heterogeneous solid masses of various sizes but no localised retroperitoneal adenopathies. Main findings: Median laparotomy was performed and revealed multiple intraperitoneal tumours. The larger masses were excised and the smaller residual implants are currently being treated with Imatinib mesylate. The patient had visceral, parietal and peritoneal dissemination. One of them, located in the supramesocolic area, had a maximal diameter of 20cm. Another one, at the level of the retro-gastric space, had a diameter of 22cm. The other tumours were smaller and spread over the parietal and visceral peritoneum, mainly between the loops of the small intestine and pelvis. Two years after cytoreduction surgery, the patient is well and free of obvious disease and has shown a good tolerance to pharmacological treatment. Conclusions: Imatinib mesylate has revolutionised the treatment of GIST and offers good palliation and prolongation of overall survival.

Aim: to study a sample of patients with morbid obesity who are on the waiting list for a surgical intervention, to establish various scores of surgical risk (Possum and severity score), and to assess potential criteria for list prioritization. Design: we calculated physiological and surgical Possum scores for every patient, and analysed comorbidities and other associated factors to calculate the severity score. Likewise, we calculated the predictive rates of morbimortality. Differences between associated comorbidities in body mass index (BMI) were also analyzed. The correlation between Possum score, prediction rates, and severity score were analyzed. Patients: fifty-two patients on the surgical waiting list in our institution (San Juan University Hospital, Reus) from 26/4/02 to 5/03/04. Results: the mean qualitative score is significantly higher in the female sex. Invalidating arthropathy and socio-occupational and/or psychiatric criteria are significantly higher in women. There is a significant correlation between the severity score and Possum score. Age does not correlate with any of the variables studied. Conclusions: possum scores are significantly related to BMI, particularly in terms of morbidity rates. The degree of correlation between the Possum score and the qualitative score tells how useful the latter is to cover other determinant factors in the severity of this condition. Socio-occupational and psychiatric criteria, and invalidating arthropathy are the main variables to be taken into account for postsurgical prediction, and are directly related to BMI degree.