ALS2-related disorders in Spanish children.

ALS2 gene encoding for alsin protein is responsible for neurological disorders due to retrograde degeneration of the upper motor neurons of the pyramidal tracts, inherited in an autosomal recessive manner, and displaying a clinical continuum including the infantile ascending hereditary spastic paraplegiaidentified in three Spanish children presented here.

Organic Acids Regulation of Chemical-Microbial Phosphorus Transformations in Soils.

We have used an integrated approach to study the mobility of inorganic phosphorus (P) from soil solid phase as well as the microbial biomass P and respiration at increasing doses of citric and oxalic acid in two different soils with contrasting agronomic P status. Citric or oxalic acids significantly increased soil solution P concentrations for doses over 2 mmol kg-1. However, low organic acid doses (<2 mmol kg-1) were associated with a steep increase in microbial biomass P, which was not seen for higher doses. In both soils, treatment with the tribasic citric acid led to a greater increase in soil solution P than the dibasic oxalic acid, likely due to the rapid degrading of oxalic acids in soils. After equilibration of soils with citric or oxalic acids, the adsorbed-to-solution distribution coefficient (Kd) and desorption rate constants (k-1) decreased whereas an increase in the response time of solution P equilibration (Tc) was observed. The extent of this effect was shown to be both soil and organic acid specific. Our results illustrate the critical thresholds of organic acid concentration necessary to mobilize sorbed and precipitated P, bringing new insight on how the exudation of organic acids regulate chemical-microbial soil phosphorus transformations.

Colangiocarcinoma en tercio medio de la vía biliar principal tratado con cirugía radical en el Hospital Nacional Guillermo Almenara, Lima, Perú / Cholangiocarcinoma in the middle third of the bile duct treated with radical surgery in Guillermo Almenara Hospital, Lima, Peru

Reportamos el caso de una paciente en quien se hizo el diagnóstico inicial de tumoración en vía biliar principal en su tercio medio. Paciente se presentó con baja ponderal de 10 kilogramos en 2 meses y dolor moderado en epigastrio, no ictericia. El paciente fue sometido a cirugía radical de la vía biliar con biopsia por congelación múltiple de bordes quirúrgicos, coledocoscopía intraoperatoria, colangiografía intraoperatoria y reconstrucción con anastomosis bilio-digestiva en Y de Roux transmesocólica, tuvo una recuperación sin complicaciones y alta precoz. El resultado anátomo-patológico evidenció adenocarcinoma tubular moderadamente diferenciado sobre la base de un adenoma. Carcinoma in situ sobre la base del adenoma. Ganglios retroperitoneales, retropancreáticos, pericoledocianos, curvatura menor y arteria hepática negativos. Bordes quirúrgicos y ampliación de bordes proximal y distal libres de neoplasia. Cirugía R0. pT1N0Mx. Estadio 1. Después de los resultados quirúrgicos óptimos es manejado por cirugía de hígado y vías biliares y oncología médica para seguimiento y controles periódicos. Presentamos aquí la secuencia de hechos y una revisión de la literatura...

We report the case of a patient who had the initial diagnosis of tumor in the bile duct in the middle third. Patient presented with lost weight of 10 kilograms in two months and moderate epigastric pain, no jaundice. The patient underwent radical surgery of the bile duct with multiple freeze biopsy surgical margins, intraoperative choledochoscopy, intraoperative cholangiography and reconstruction bilioenteric anastomosis Y Roux transmesocolic, he had a great recovery and early discharge. The pathological results showed moderately differentiated tubular adenocarcinoma on the basis of an adenoma. Negatives retroperitoneal, retropancreatic, pericholedochal, lesser curvature and negative hepatic artery nodes, and extension of surgical margins free of neoplasia proximal and distal edges. R0 surgery. pT1N0Mx. Stage 1. After the optimal surgical outcomes, is managed by liver and biliary tract surgery service and medical oncology service for regular monitoring and controls. We present here the sequence of events and a review of the literature...

[Cholangiocarcinoma in the middle third of the bile duct treated with radical surgery in Guillermo Almenara Hospital, Lima, Peru]. / Colangiocarcinoma en tercio medio de la vía biliar principal tratado con cirugía radical en el Hospital Nacional Guillermo Almenara, Lima, Perú.

We report the case of a patient who had the initial diagnosis of tumor in the bile duct in the middle third. Patient presented with lost weight of 10 kilograms in two months and moderate epigastric pain, no jaundice. The patient underwent radical surgery of the bile duct with multiple freeze biopsy surgical margins, intraoperative choledochoscopy, intraoperative cholangiography and reconstruction bilioenteric anastomosis Y Roux transmesocolic, he had a great recovery and early discharge. The pathological results showed moderately differentiated tubular adenocarcinoma on the basis of an adenoma. Negatives retroperitoneal, retropancreatic, pericholedochal, lesser curvature and negative hepatic artery nodes, and extension of surgical margins free of neoplasia proximal and distal edges. R0 surgery. pT1N0Mx. Stage 1. After the optimal surgical outcomes, is managed by liver and biliary tract surgery service and medical oncology service for regular monitoring and controls. We present here the sequence of events and a review of the literature.

Malaria por Plasmodium falciparum en Sullana / Malaria for plasmodium falciparum in Sullana

El aumento de número de casos de Malaria falciparum en el distrito de Querecotillo-Sullana ha motivado realizar este estudio epidemiológico. Se tomaron dos datos del libro de Registro y Seguimiento de Casos de Malaria del año 1997. El grupo etáreo más afectado estuvo entre 15 y 44 años. La tasa de incidencia fue 14.2 por ciento, las localidades más afectadas fueron: Peña, Puente, Victoria y Querecotillo, en relación a factores climatológicos, sociales, económicos y tipo de cultivo. Concluímos que la población económicamente activa es la más afectada, el mayor número de casos se presenta durante los meses de cosecha. Querecotillo es un área de alto riesgo para malaria falciparum.