Dicer1在肾上腺皮质腺瘤和癌中的意义(免疫组化研究)

Heba Rashad, Aya Abdel monem, Mohebat Gouda, Taghreed Abdelaziz
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Significance of Dicer1 in Adrenocortical Adenoma and Carcinoma (Immunohistochemical Study)
: Background: Adrenocortical tumors (ACTs) are detected in 5– 7% of the general population. Dysregulation of micro-ribonucleic acid (microRNA) biogenesis machinery-is involved in a variety of human cancers. Dicer1 is an essential component of microRNA machinery. Aim: To evaluate the diagnostic and prognostic significance of Dicer1 in adrenocortical adenoma (ACA) and carcinoma (ACC), then correlate the results with clinico-pathological data. Material and Methods: Forty adrenocortical lesions were included in this retrospective study, included (20) ACA and (20) ACC. Clinicopathological characteristics of examined cases were correlated with the IHC expression of Dicer1. Results: Dicer1 IHC expression was more frequent in ACC (65%) than in ACA (25%), (P =0.04). But among ACC, a weak Dicer1 expression was significantly more frequent in advanced ACCs. There was a significant statistical inverse relation between Dicer1 expression in studied ACC cases according to tumor size, weight, Weiss score, lymph node metastasis, lympho-vascular invasion and ENSAT stage (P <0.05). Other clinico-pathological variables such as age, sex, tumor site, tumor grade, and distant metastasis showed no significant statistical difference (P >0.05). Dicer1 showed 76% sensitivity and 67% specificity for differentiating ACA from ACC. Conclusion: Reduced Dicer1 expression with tumor progression in ACC may play a role in the tumorigenesis and further decline in Dicer1 expression may be associated with poor prognosis in ACC.
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