A consensus molecular classification of muscle-invasive bladder cancer
A. Kamoun, A. de Reynies, Y. Allory, G. Sjodahl, A. G. Robertson, R. Seiler, K. Hoadley, H. Al-Ahmadie, W. Choi, C. S. Groeneveld, M. A. A. Castro, J. Fontugne, P. Eriksson, Q. Mo, J. Kardos, A. Zlotta, A. Hartmann, C. P. Dinney, J. Bellmunt, T. Powles, N. Malats, K. S. Chan, W. Y. Kim, D. J. McConkey, P. C. Black, , The Bladder Cancer Molecular Taxonomy Group
Abstract
Muscle-Invasive Bladder Cancer (MIBC) is a molecularly diverse disease with heterogeneous clinical outcomes. Several molecular classifications have been proposed, yielding diverse sets of subtypes, which hampers the clinical implications of such knowledge. Here, we report the results of a large international effort to reach a consensus on MIBC molecular subtypes. Using 1750 MIBC transcriptomes and a network-based analysis of six independent MIBC classification systems, we identified a consensus set of six molecular classes: Luminal Papillary (24%), Luminal Non-Specified (8%), Luminal Unstable (15%), Stroma-rich (15%), Basal/Squamous (35%), and Neuroendocrine-like (3%). These consensus classes differ regarding underlying oncogenic mechanisms, infiltration by immune and stromal cells, and histological and clinical characteristics. This consensus system offers a robust framework that will enable testing and validating predictive biomarkers in future clinical trials.
02 /Specification & Classification
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