Abstract
Abstract Bladder cancer can be divided into several major subtypes that include urothelial carcinoma, squamous cell carcinoma, adenocarcinoma and neuroendocrine carcinoma. Urothelial carcinoma, the most common form of bladder cancer, is further subdivided into numerous histologic variants based on distinct morphologic features. While histologic characterization remains the most important factor in diagnosis and patient management, emerging molecular data across bladder cancer subtypes and variants may potentially alter how bladder cancer is classified. Large scale -omic analytics have uncovered unique signatures within major bladder cancer subtypes. In addition, molecular groupings and unique single-gene alterations have been identified within urothelial carcinoma and its many morphologic variants, including plasmacytoid urothelial carcinoma and micropapillary urothelial carcinoma. We will review molecular alterations in major categories of bladder cancer and urothelial carcinoma variants. Many of these molecular alterations could potentially be used in revised classification, diagnosis, and therapy of bladder cancer. Citation Format: Donna E. Hansel. Molecular alterations in variant morphology [abstract]. In: Proceedings of the AACR Special Conference on Bladder Cancer: Transforming the Field; 2019 May 18-21; Denver, CO. Philadelphia (PA): AACR; Clin Cancer Res 2020;26(15_Suppl):Abstract nr IA04.
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