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Rev. bras. ciênc. saúde ; 22(3): 255-260, 2018. tab 1056 KB
Article in Portuguese | LILACS | ID: biblio-946600

ABSTRACT

Objetivo: Avaliar as alterações esplênicas de idosos autopsiados de acordo com diferentes causas de morte. Material e Métodos: Foram selecionados 38 idosos autopsiados no Hospital de Clínicas da Universidade Federal do Triângulo Mineiro entre 1996 e 2012. As causas de morte foram agrupadas em cardiovascular (n=13), infecciosa (n=15) e neoplásica (n=10). Os fragmentos de baço foram analisados para determinação da densidade dos folículos linfoides, da área das arteríolas centro foliculares e da porcentagem de fibras colágenas e elásticas. Resultados: Os idosos acometidos pela causa de morte neoplásica apresentaram maior peso esplênico (234,00 vs 126,23g) e menor densidade folicular (0,16 vs 0,36 folículos/mm2) quando comparado aos acometidos pela causa cardiovascular. O grupo de causa neoplásica apresentou maior área das arteríolas centro foliculares quando comparado ao de causa infecciosa (817,00 vs 701,10µm2). Houve uma correlação negativa e significativa entre o peso do baço e a densidade folicular nos grupos com causa cardiovascular e neoplásica (rS=-0,382; p=0,018). Os idosos acometidos pela causa de morte cardiovascular apresentaram significativamente maior porcentagem de fibras colágenas que os idosos com causa infecciosa (0,81 vs 0,65%, p=0,002). O grupo acometido pela causa de morte infecciosa apresentou significativamente maior porcentagem de fibras elásticas quando comparado ao da causa neoplásica (6,01 vs 3,47%, p=0,001). Conclusão: As diferentes causas de mortes influenciam de modo distinto as alterações histomorfométricas do baço durante o envelhecimento. As doenças neoplásicas estiveram associadas ao aumento da área das arteríolas centro foliculares e a diminuição da densidade folicular, enquanto as doenças cardiovasculares contribuíram para o aumento da fibrose esplênica. (/AU)


Objective: To evaluate the changes in the spleens of elderly autopsied according to different causes of death. Material and Methods: We selected 38 elderly autopsied between 1996 and 2012 at the Clinical Hospital of the Federal University of Triangulo Mineiro. The causes of death were grouped into cardiovascular (n=13), infectious (n=15) and neoplastic (n=10). Spleen fragments were analyzed to determine the lymphoid follicle density, follicular arteriole area, and the percentage of collagen and elastic fibers. Results: The elderly affected by neoplastic causes had a higher splenic weight (234.00 vs 126.23g) and a lower follicular density (0.16 vs 0.36 follicles/mm2) than those affected by cardiovascular death. The neoplastic cause group presented greater area of central follicular arterioles when compared to that of infectious death (817.00 vs 701.10ìm2). There was a significant negative correlation between spleen weight and follicular density in the groups with cardiovascular and neoplastic causes (rS=- 0.382; p=0.018). The elderly affected by cardiovascular death presented had a significantly higher percentage of collagen fibers than the elderly with infectious death (0.81 vs 0.65%, p=0.002). The group affected by infectious death had a significantly higher percentage of elastic fibers when compared to the neoplastic death group (6.01 vs 3.47%, p=0.001). Conclusion: The different causes of death influence differentially histomorphometric changes of the spleen during aging. Neoplastic diseases were associated with an increase in the area of central follicular arterioles and decreased follicular density, while cardiovascular diseases contributed to the increase of splenic fibrosis. (AU)


Subject(s)
Humans , Male , Female , Aged , Aged, 80 and over , Extracellular Matrix , Spleen , Aging
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