Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/5648
Title: Pathology of the spleen in hepatosplenic schistosomiasis. Morphometric evaluation and extracellular matrix changes
Authors: Freitas, Carla Rangel Leite
Barbosa Junior, Aryon de Almeida
Fernandes, André L. M
Andrade, Zilton de Araújo
Affilliation: Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Farmanguinhos. Rio de Janeiro, RJ, Brasil
Abstract: Histological, ultrastructural, morphometric and immunohistochemical data obtained from the study of spleens removed by splenectomy from 34 patients with advanced hepatosplenic schistosomiasis revealed that the main alterations were congestive dilatation of the venous sinuses and diffuse thickening of the splenic cords. Splenic cord thickening was due to an increase of its matrix components, especially type IV collagen and laminin, with the conspicuous absence of interstitial collagens, either of type I or type III. Deposition of interstitial collagens (types I and III) occurred in scattered, small focal areas of the red pulp, but in the outside of the walls of the venous sinuses, in lymph follicles, marginal zone, in the vicinity of fibrous trabeculae and in sidero-sclerotic nodules. However, fibrosis was not a prominent change in schistosomal splenomegaly and thus the designation "fibro-congestive splenomegaly" seems inadequate. Lymph follicles exhibited variable degrees of atrophy, hyperplasia and fibrous replacement, sometimes all of them seen in different follicles of the same spleen and even in the same examined section. Changes in white pulp did not seem to greatly contribute to increasing spleen size and weight, when compared to the much more significant red pulp enlargement.
Keywords: Splenomegaly
Hepatosplenic schistosomiais
Extra-cellular matrix
Histopathology
Morphometry
DeCS: Matriz Extracelular/patologia
Hepatopatias Parasitárias/patologia
Esquistossomose/patologia
Esplenopatias/patologia
Esplenopatias/parasitologia
Adolescente
Adulto
Feminino
Humanos
Masculino
Meia-Idade
Issue Date: 1999
Citation: FREITAS, C.R. et al. Pathology of the spleen in hepatosplenic schistosomiasis. Morphometric evaluation and extracellular matrix changes. Memórias do Instituto Oswaldo Cruz, v. 94, n. 6, p. 815-22, nov.-dec. 1999.
ISSN: 0074-0276
Copyright: open access
Appears in Collections:Farmanguinhos - Artigos de Periódicos
BA - IGM - Artigos de Periódicos

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