Her-2/Neu Overexpression in Invasive Bladder Carcinoma Among a Cohort of Egyptian Patients

Abstract

Background: Bladder cancer is one of the commonest malignancies among Egyptian population with high morbidity and mortality rates. Human epidermal growth factor receptor-2 (Her-2/Neu) seems to play role in the pathogenesis and prognosis of bladder carcinomas; however, its expression and prognostic significance were variable between different studies. This study evaluates the status of Her-2/Neu protein expression in invasive carcinomas of the bladder among a cohort of Egyptian patients using immunohistochemistry (IHC) and determines its relation to some clinicopathological factors.

Methods: A number of 32 invasive bladder carcinoma patients treated with radical cystectomy were enrolled. Tumor sections were immunostained using anti-Her-2/Neu antibody and were evaluated by at least two pathologists. Statistical analysis was carried out with the Statistical Software Package Standard (SPSS).

Results: Her-2/Neu membranous staining was observed in 20 carcinomas (62.5%). Statistical analysis revealed significant direct association between Her-2/Neu and both increasing grade of carcinoma (P = 0.001) and depth of tumor invasion (P= or <0.001). Patients gender, histological subtype and the presence of bilharzial cystitis did not have any significant association with Her-2/Neu overexpression.

Conclusion: Her-2/Neu immunopositivity was observed in a considerable proportion of cases with association to adverse prognostic factors, thus patients with high-grade, deeply invasive carcinoma of the bladder may benefit from Her-2/Neu-targeted therapies after radical cystectomy.

World J Nephrol Urol. 2013;2(2):70-75
doi: http://dx.doi.org/10.4021/wjnu123w