[Liposarcoma histologic subtypes: four cases reports]. / Subtipos histológicos de liposarcoma: presentación de cuatro casos.

The liposarcoma is a malignant tumor of mesodermic origin derived of the adipose tissue. Liposarcoma s types, according to his histological diagnosis, are: mixoide, pleomorphic, well differentiated and dedifferentiated. It can get to reach enormous proportions, mainly when it is located at abdominal level. His treatment is the radical surgery, it is possible, together with radiation therapy and/or chemotherapy. Four patients diagnosed of liposarcoma are shown up, a case of liposarcoma well differentiated, another case of liposarcoma pleomorphic and two cases about liposarcoma mixoide; with the characteristic that one of these two cases presented a local recidivation with a dediferenciation of itself. The evolution of the four cases, was in a different way. So, their prognosis is going to depend on their histopathologic variety and on a possible multicentricidad that is going to difficult the complete radical surgical exeresis.

[Colonic perforation, a rare complication of acute necrotizing pancreatitis]. / Perforación colónica, una rara complicación de pancreatitis aguda necrotizante.

The inflammatory disease of the pancreas can be classified like us acute or chronic pancreatitis. The pancreatitis incidence vary according to the countries and the causes which originate it; consumption of alcohol, gallotone, metabolic factors, drugs and others. The anatomopathological spectrum of the acute pancreatitis vary from pancreatitis edematosa, which usually is a light disorder with a limited evolution, to the pancreatitis necrosante, in which the grade of pancreas necrosis keeps relation with the importance of the attack and with its general declarations that in his evolution can give place to numerous complications, among which the colonic perforation is not frequent. We present a 75-year-old woman, with acute pancreatitis necrohaemorragic for colelitiasis multiple that evolves favorably at the beginning of the medical treatment, but she presented a later colonic perforation as a rare complication of the pancreatic process.

Endocarditis bacteriana en un adulto sobre la propia comunicación interventricular congénita / Bacterial endocarditis in an adult on the own interventricular septal congenital defect complicated by a pulmonary embolism

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