Expressão do receptor de estrogênio nos bócios submetidos à tireoidectomias em Manaus

Abstract

The goiter is a clinical condition characterized by the increase of the thyroid gland at the expense of a nodule(s), tangible or not, whose incidence in general ranges from 4% to 7%, especially in women. It is endemic in Amazon Region, and a public health problem. Objective: To evaluate the expression of the estrogen receptor (RE) in a qualitative way in surgical pieces with the histopathologic diagnosis of goiter patients undergoing thyroidectomy in Manaus city. Methods: Forty-nine patients with goiter histopathological diagnosis were selectec, and from its paraffin blocks, was evaluated the expression of the estrogen receptor (not specific) by immunohistochemistry using the technique of streptoavidina-biotin immunoperoxidase staining and primary antibodies anti-ER. The statistical analysis used the non-parametric test Fisher's exact, with 5% significance level, and Pearson's correlation coefficient. Results: Forty-seven (95.9%) patients were negative for estrogen receptor, while two (4.1%) had positive immunoexpression. Thirty eight (84.45%) patients were female and seven (15.6%) were male. The majority of patients were in the age range 42 to 52 years (19 patients), while the minority (two patients) were above 74 years. The minimum patients age was 31 years and the maximum was 87 years, with an average of approximately 53 years. No statistical difference was found (p-value: 0.732) to correlate the gender of the patients with positive immunoexpression of estrogen receptor. There was a reasonable correlation negative (Pearson Correlation - 13.9%) between immunohistochemical analysis and the patients age, in which the two patients ER positive were within the range age (42 to 52 years) of higher incidence (42.6% of patients). Conclusion: there is not a direct relationship between the goiter development and the presence of the estrogen receptor in the thyroid gland.