THE MOLECULAR CHARACTERISTICS OF BLADDER CANCER IN YOUNG PATIENTS |
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Authors: | JURGEN F LINN ISABELL SESTERHENN FATHOLLAH K MOSTOFI MARK SCHOENBERG |
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Institution: | From the James Buchanan Brady Urological Institute and Department of Urology, The Johns Hopkins Medical Institutions, Baltimore, Maryland, and the Department of Genitourinary Pathology, Armed Forces Institute of Pathology, Washington, D. C. |
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Abstract: | PurposeThe molecular characteristics of bladder cancer in children and young adults remain largely undefined. We sought to identify common molecular changes in bladder tumors in young patients using standard immunohistochemical and interphase cytogenetic methods.Materials and MethodsWe retrospectively evaluated 73 bladder tumors removed from patients younger than 30 years for the p53 tumor suppressor gene product using immunohitochemical techniques and numerical aberrations of chromosomes 9, 17, X and Y.ResultsRegardless of stage, immunohistochemical evidence of p53 gene product over expression was found in the majority of tumors studied. Numerical abberations (mosomy) of chromosome 9 were rare. Aneuploidy of chromosome 17 was common, particularly in carcinoma in situ and invasive bladder cancer.ConclusionsThese data suggest that immunohistochemical evidence of p53 gene product over expression is common in bladder cancer in young patients. Further prospective analysis of lesions in this population may help to establish a comprehensive molecular progression model for urothelial neoplasms. |
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