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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

AvaliaÃÃo imunohistoquÃmica da expressÃo de receptores de estrogÃnio (RE) e de progesterona (RP), em neoplasias escamosas intraepiteliais e invasoras do colo uterino: correlaÃÃes com a progessÃo tumoral. / Immunohistochemical evaluation of estrogen and progesterone receptor expression in intraepithelial and invasive squamous neoplasia of the uterine cervix: correlation with tumor progression

Francisco Josà Bastista da Silva 16 January 2004 (has links)
O CÃncer do colo uterino, permanece sendo uma patologia de grande incidÃncia (16,3/100 mil) e mortalidade (1.627/100 mil) no nordeste brasileiro; altamente correlacionado ao HPV (98%, por PCR). A relaÃÃo entre estÃgios evolutivos da neoplasia do colo uterino e receptores hormonais ainda à obscura. Verificou-se a expressÃo imunohistoquÃmica dos receptores hormonais RE e RP em diferentes estÃgios evolutivos do cÃncer do colo uterino em comparaÃÃo ao ciclo menstrual e idade. Em 144 amostras da cÃrvice uterina, analisaram-se 62 casos de LIEBG, 41 casos de LIEAG, e 41 casos de CEC. A expressÃo imunohistoquÃmica dos receptores hormonais foi avaliada em escores (1 a 9): intensidade da reaÃÃo (1 a 3) e dispersÃo celular (1 a 3), tanto no epitÃlio quanto no estroma.A correlaÃÃo entre os parÃmetros foi avaliada pelo Teste exato de Fisher-Yates. Houve diminuiÃÃo da expressÃo nuclear de RE e RP à medida da progressÃo tumoral. No estroma a expressÃo nuclear do RE e RP tendem a aumentar de LIEBG para LIEAG e CEC, embora nestes os escores fossem menores. Com relaÃÃo ao ciclo menstrual nÃo houve alteraÃÃes significativas entre a primeira e segunda fase do ciclo menstrual. As anÃlises prà e pÃs-menopausa nÃo evidenciaram variaÃÃes significativas na expressÃo dos receptores hormonais estudados. / Cervical cancer is associated with a very high incidence (16.3/100.000) and mortality (1,627/100.000) in northeastern Brazil; strongly correlated with HPV (98% by PCR). However, the relation between the stages of cervical cancer and the hormonal receptors ER and PR remains unclear. This study presents an immunohistochemical analysis of the morphological expression of the hormonal receptors ER and PR in different stages of cervical cancer. One hundred forty-four samples were obtained for analysis from the cervices of patients at a cancer screening service in northeastern Brazil in the years 2001 and 2002. Following gynecological examination colposcopically guided biopsies revealed apparently abnormal epithelia. Subsequently the specimens were classified in scores (1 to 9) according to hormonal receptor expression: intensity reaction (1 to 3) versus cell-marked dispersion (1 to 3).Sixty-two cases of LSIL, 41 cases of HSIL and 41 cases of ISCC were compared with regard to menstrual cycle and age. In SIL nuclear reactivity to ER decreased gradually from the lower to the higher stages, including that of ISCC. Stromal marked nuclei were seen in SIL and tended to increase in ISCC in spite of displaying lower scores. There were no significant differences for ER and PR expression related to menstrual cycle phases or menopausal status. Pre- and post-menopausal analyses showed no significant variation in the expression of either ER or PR.

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