BRCA1 and breast cancer: Similarly, breast cancer subtypes (BRCA1 and BRCA2) account for only \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{upgreek}\usepackage{mathrsfs}\setlength{\oddsidemargin}{-69pt}\begin{document}$\sim$\end{document}2.5% (only 24/965 samples in TCGA-BRCA), clearly indicating that other mutations are important.