Gastric adenocarcinoma in childhood: a case report and a literature review. / Adenocarcinoma gástrico en la infancia. Reporte de caso y revisión de la literatura.

Gastric tumors, especially gastric adenocarcinomas, are rare in childhood and adolescence, as a result of which there is limited information. Therefore, management is typically extrapolated from adult patients. We report the case of a 10-year-old girl referred to our institution with systemic symptoms and pyloric syndrome. An infiltrating antro-pyloric lesion without evidence of metastasis was found. Histopathological analysis confirmed the presence of an undifferentiated diffuse gastric adenocarcinoma with signet ring cells. Diagnostic laparoscopy was carried out, which demonstrated signs of peritoneal carcinomatosis, so palliative chemotherapy was proposed.

Los tumores gástricos, en especial el adenocarcinoma gástrico, son infrecuentes en la infancia y la adolescencia. Por ello, la información sobre esta patología es limitada, de ahí que el manejo sea extrapolado de pacientes adultos. Reportamos el caso de una niña de 10 años de edad, remitida a nuestra institución, con síndrome constitucional y síndrome pilórico, en quien se encontró una lesión infiltrativa antropilórica sin evidencia de metástasis. El reporte histopatológico confirmó un adenocarcinoma gástrico difuso indiferenciado con células en anillo de sello. Se realizó laparoscopia diagnóstica donde se encuentran signos de carcitonamatosis peritoneal, por lo que se ofreció quimioterapia con intención paliativa.

Adenocarcinoma gástrico en la infancia. Reporte de caso y revisión de la literatura / Gastric adenocarcinoma in childhood: a case report and a literature review

Los tumores gástricos, en especial el adenocarcinoma gástrico, soninfrecuentes en la infancia y la adolescencia. Por ello, la informaciónsobre esta patología es limitada, de ahí que el manejo sea extrapoladode pacientes adultos.Reportamos el caso de una niña de 10 años de edad, remitida anuestra institución, con síndrome constitucional y síndrome pilórico,en quien se encontró una lesión infiltrativa antropilórica sin eviden-cia de metástasis. El reporte histopatológico confirmó un adenocar-cinoma gástrico difuso indiferenciado con células en anillo de sello.Se realizó laparoscopia diagnóstica donde se encuentran signos decarcitonamatosis peritoneal, por lo que se ofreció quimioterapia conintención paliativa.(AU)

Gastric tumors, especially gastric adenocarcinomas, are rare inchildhood and adolescence, as a result of which there is limited infor-mation. Therefore, management is typically extrapolated from adultpatients.We report the case of a 10-year-old girl referred to our institutionwith systemic symptoms and pyloric syndrome. An infiltrating antro-py-loric lesion without evidence of metastasis was found. Histopathologicalanalysis confirmed the presence of an undifferentiated diffuse gastricadenocarcinoma with signet ring cells. Diagnostic laparoscopy wascarried out, which demonstrated signs of peritoneal carcinomatosis, sopalliative chemotherapy was proposed.(AU)

Effects of trawling on the diets of common demersal fish by-catch of a tropical prawn trawl fishery.

The ecological effect of prawn trawling on the benthos of the Gulf of Carpentaria, northern Australia, was investigated by examining stomach contents of common demersal fishes incidentally caught as by-catch in the fishery. Fishes were collected from high and low fishing intensity sites in three regions based on vessel monitoring system data. The diets of eight species of benthic fish predators were compared between regions and fishing intensities. A regional effect on diet was evident for seven species. Only one generalist species had no significant difference in diet among the three regions. For the comparisons within each region, five predator species had significantly different diet between high and low fishing intensities in at least one region. Across the three regions, high fishing intensity sites had predators that consumed a greater biomass of crustaceans, molluscs and echinoderms. At low fishing intensity sites, predators had diets comprising a greater biomass of cnidarians and teleosts, and a different assemblage of molluscs, crustaceans and fishes. These changes in diet suggest that there may have been a shift in the structure of the benthic community following intensive fishing. Analysis of predator diets is a useful tool to help identify changes in the benthic community composition after exposure to fishing. This study also provided valuable diet information on a range of abundant generalist benthic predators to improve the ecosystem modelling tools needed to support ecosystem-based fisheries management.

Recovery of Durvillaea antarctica (Durvilleales) inside and outside Las Cruces Marine Reserve, Chile.

We present the results for over two decades of monitoring on intertidal food-gatherers and the population of the low rocky shore dweller kelp Durvillaea antarctica, a short-distance disperser, inside and outside the no-take marine reserve, Estacion Costera de Investigaciones Marinas (ECIM), at Las Cruces, central Chile. It was hypothesized that protection of an initially extremely depleted population would recover by recolonizing first the no-take area and then adjacent non-protected (exploited) areas. We found that recovery of D. antarctica occurred slowly inside ECIM, with increase in density and biomass, of up to three orders of magnitude as compared to an adjacent non-protected area, which showed approximately 2-yr delay. These results suggest that the kelp population inside ECIM was likely regulated via intraspecific competition, which did not occur outside. Results showed no evidence for juvenile vs. adult density dependence other than a weak relationship for the central area of ECIM. These findings also suggest that the population recovery and cross-boundary seeding subsides affected the population dynamics. Understanding these dynamics may enhance management and conservation policies. Our work highlights the critical value of baseline and long-term comparative studies in marine no-take protected and non-protected areas for understanding how population processes respond to human and conservation practices.