Signo de los vasos gemelos en el diagnóstico de la interrupción de la vena cava con continuación acigos / Sign of the twin glasses in the diagnosis of the interruption of the vein digs with continuation acigos

Llamamos signo de los vasos gemelos la identificación con procedimientos de imagen de la vena ácigos y la aorta con diámetro similar, una al lado de la otra. Este fenómeno se debe a la gran dilatación de la vena ácigos en caso de interrupción de la vena cava.

Insectos asociados con flores de malezas del Jardín Botßnico de Santiago de Cuba, con énfasis en Hymenoptera / Insects associated with flowers of weeds of the Botanical Garden of Santiago de Cuba, with emphasis on Hymenoptera

The insect visitors of flowers in nine weeds species were studied in the Botanical Garden of Santiago de Cuba, Eastern Cuba, during 1993 (March-June, spring season) and 1994 (January-March, end of winter and beginning of spring season). About 50 hours of collecting efforts were made at three times (0900-0930 hr in 1993; 0900-0930 hr, 1200-1230 hr and 1500-1530 hr in 1994). More than 140 species of at least 37 families were found; Hymenoptera dominated (with more than a half of specimens), followed by Diptera, Coleoptera and Lepidoptera. Among Hymenoptera, bees (Apoidea) were the largest group, especially Apis mellifera L; followed by wasps (Vespidae, Pompilidae, Sphecidae) and ichneumon flies (Ichneumonidae); Microhymenopterans were not sampled. Hymenopterans of each weed were compared for diversity, similarity, dominant and subdominant species, visitation time, sampling efficiency, etc. Each plant species had a particular Hymenoptera complex, almost one third of which were natural enemies of agricultural pests, and most are believed to be potential pollinators. Closely related species showed similar patterns of daily activity, with a peak at 0900-0930 hr for all plant species. Second grade polynomial equations were the best fitted models to describe the relationships between number of species and number of specimens, and between total number of species and number of samples (R2 = 0.9734 and R2 = 0.9573, p < 0.01). The role of weeds in the biodiversity of the agroecosystems is analyzed; as well as the effectiveness of this collection method to study Hymenoptera.

Tumor de frantz neoplasia de un caso y revisión de la literatura

Se reporta un caso de tumor de Frantz (neoplasia papilar quistica del pácnreas), en una mujer de 23 años, a quien se laparotomizó encontrándo un tumor del cuerpo y cola pancreatica, con gran invasión local, no así linfática. Describimos la clínica, histológía e imagen de esta neoplasia, como el esfuerzo quirurgico del grupo de cirujanos, Logrando la radicalidad del tumor, ofreciendo de esta manera, a una pacientes jóven escelente sobrevida.

Uso del benfluorex en pacientes hiperlipidémicos ecuatorianos: estudio cooperativo multicéntrico / Use of benfluorex in hyperlipidemic ecuadorian patients: multicentric and cooperative study

El benfluorex, un hipolipemiante ampliamente conocido, ha demostrado, mediante un estudio abierto en una muestra ecuatoriana, sus propiedades al hacer descender los niveles de colesterol total, triglicéridos y LDL-C en forma significativa e incrementar los niveles del HDL-C también significativamente. Todo esto redunda en la disminución del riesgo aterosclerótico