Diagnóstico de un quiste duodeno-colónico con contenido inflamatorio derivado de la metástasis de adenocarcinoma de vesícula biliar: reporte de caso.

The existence of a cystic mass which walls originated from a metastatic gallbladder adenocarcinoma is infrequent. We present the case of 68-year-old male that present to the emergency department with abdominal distention, hyporexia and jaundice. Upon exploratory laparotomy, a duodeno-colonic cyst with walls formed by metastatic cells derived from a Gallbladder Adenocarcinoma. Metastatic disease from a gallbladder adenocarcinoma to transverse colon and duodenum formed adherences between both organs, leading to the formation of cystic mass. Cancer cells have multiple adaptation mechanisms in order to survive harsh environments.

La existencia de un quiste cuyas paredes se originaron de una metástasis de adenocarcinoma de vesícula biliar es infrecuente. Varón de 68 años con distensión abdominal, hiporexia e ictericia. En la laparotomía exploratoria se evidencia un quiste duodeno-colónico de paredes conformadas por células metastásicas producto de un adenocarcinoma de vesícula biliar. La metástasis del adenocarcinoma de vesícula biliar hacia colon transverso y duodeno formaron adherencias entre ambos órganos, conduciendo a la formación de una masa quística. Las células cancerígenas pueden adaptarse de muchas maneras para sobrevivir en entornos adversos.

A new species of Auriculostoma (Digenea: Allocreadiidae) in South America: life cycle and phylogenetic relationships.

Auriculostoma is a genus of digenean (Trematoda) whose adults are parasites of Neotropical freshwater fishes. We describe Auriculostoma ocloya n. sp. using morphological and molecular tools, and we elucidated its life cycle, the first known of a species of this genus. The first intermediate host is the bivalve Pisidium ocloya, the second intermediate host is the amphipod Hyalella sp., and the definite hosts are siluriform fishes. The adult presents a single pair of muscular lobes on either side of the oral sucker with a broad base, stretching from ventrolateral to dorsolateral side, a structure also present in the rest of species of the genus. Nevertheless, the new species differs from all congeners by the combination of several traits, and mainly because on the dorsal side "free" ends of the lobes are absent because they are fused. This is the first study to provide sequence data on larval and adult stages of a species of Auriculostoma. Our phylogenetic analysis demonstrated its basal position among species of the genus. Therefore, integrative morphological, molecular, and life cycle data on other South American species of the genus, would contribute to reveal more patterns in the allocreadiid systematics.

The life cycle of Magnivitellinum saltaensis n. sp. (Digenea: Alloglossidiidae) in Salta Province, Argentina.

We describe the alloglossiid trematode Magnivitellinum saltaensis n. sp., a parasite of the characiform fish Psalidodon endy, and its life cycle from Salta, northwest of Argentina. This is the first life cycle described for a species belonging to the genus Magnivitellinum. Cercariae emerged naturally from Biomphalaria tenagophila snails and infected experimentally exposed larvae of Diptera and Ephemeroptera as second intermediate hosts. These larvae in turn were exposed to commercially raised fish, and adults were recovered from characiform albino fish Gymnocorymbus ternetzi. Molecular analysis of natural and experimental adults showed the same genetic sequence for the partial region of 28S rDNA, thus confirming conspecificity. Comparison of these sequences with those published for M. simplex from Mexico showed 1.45% divergence, indicating that the specimens found in Salta belong to a different species, the third described of Magnivitellinum, in agreement with morphological data, geographical location, and host species composition. The new species is distinguished by its small body, vitelline follicles extending from the mid-level of the ventral sucker, Y-shaped excretory vesicle, and presence of papillae around the mouth.

Pasantías funciones obstétricas esenciales

Presenta los contenidos a desarrollarse en las pasantías para el manejo de las funciones obstétricas esenciales de emergencia, con las que se pretende proporcionar conocimientos y desarrollar habilidades y destrezas en el personal de salud que atiende a la mujers durante el embarazo y parto en las diferentes urgencias obstétricas.