Asociación de colesterolosis y litiasis de la vesícula biliar: implicancia patogénica y efecto sobre la historia natural de la colelitiasis / Association between cholesterolosis and lithiasis of gallbladder: pathogenic implication and effect over natural history of cholelithiasis

We studied 793 patients subjected to cholecystectomy to determine a) the relative frequency of cholesterolosis and cholelithiasis b) the effect of their association on the natural history of biliary disease, c) the characteristics of gallstones associated to cholesterolosis and d) factors potentially associated to their pathogenesis. The gallbladders of all patients were examined and in 289 subjects a preoperative clinical history was taken. We observed that cholesterolosis is associated to earlier clinical manifestations of biliary disease and cholecystectomy, to a greater frequency of single calculus and to a higher weight/height index. It is concluded that there are relationships between the pathogenesis of cholesterolosis and cholelithiasis and that their association favors the development of clinical manifestations

Corioangioma placentario complicado: causa infrecuente de parto prematuro / Complicated placental corioangioma: infrequent cause of premature labor

Se presenta el caso de una paciente que cursando un embarazo fisiológico de 32 semanas presenta súbitamente trabajo de parto prematuro y parto pretérmino, evidenciándose durante el alumbramiento un gran tumor placentario complicado de torsión. La anatomía patológica revela un corioangioma placentario complicado de torsión, infarto y hemorragia. Se postula que esta complicación es el factor causal del parto prematuro en esta paciente