R Barrios del Valle

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We review the pathological specimens sent to the Pathology Department from January 1983 to June 1988 that belonged to 7567 patients. For this study we have selected specimens from 1139 patients (15.05% of the total), who were submitted to valvular replacement surgery. We analyzed 1037 "native" valves and 186 prosthesis. Rheumatic fever was confirmed in 68%(More)
The presence of rigid coronary arterial segments was detected during a survey for coronary atherosclerosis in men who died of violent causes. These lesions which traditionally are considered of non-clinical significance, in the absence of stenosis are probably responsible of the clinical and electrocardiographical abnormalities as seen in patients with(More)
The severity and prevalence of coronary and aortic atherosclerosis was studied in 174 subjects who died from violent causes in Mexico City. As in other geographic areas, fatty streaks were found early in life (12 years old). Fibrolipid plaques were present in the thoracic aorta at age 15 and at age 19 in the abdominal segment. Complicated lesions were(More)
The prevalence of microscopic atheroma in the proximal left anterior descending coronary artery was studied in thirty young males aged 20 to 29 years, living in Mexico City, who died in urban accidents. All of them were either unemployed or labor workers with a socioeconomical status considered to be representative of the majority of young males living in(More)
Topographic and morphologic aspects of coronary atherosclerotic "protruding" lesions were investigated in 119 accidental deaths in males living in Mexico City. Morphology and topography varied according to the arterial trunk studied and age. Left anterior descending and circumflex lesions were almost always confined to the initial 5 cms and if a lesion was(More)
A case of small and large cells non Hodgkin lymphoma with an unusual involvement of the lung is presented. The tumor was located in the inferior lower lobe of the right lung and coincided with hemorrhagic pleural effusion. The cytopathological study of the fluid was negative for neoplastic cells, so were the aspiration biopsy of the lung and the pleural(More)
For clinicians, cardiac myxomas has been a diagnostic challenge. It may simulate a valvular disfunction. The present paper displays the morphologic aspects on 17 patients with the diagnosis of atrial myxoma. In 14 cases the tumor was located in the left atrium. In all the cases stellate shaped cells were seen within a myxoid matrix. The findings in this(More)
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