Abstract: This document provides methods and materials related to assessing the likely outcome for mammals (e.g., humans) with cancer (e.g., breast cancer). For example, methods and materials for using the ratio of HOXB13 polypeptide expression to IL-17BR polypeptide expression, CYP2D6 genotype, medication history, or combinations thereof to determine the likelihood of a breast cancer patient to experience breast cancer relapse or death are provided.

Abstract: This document provides methods and materials related to assessing the likely outcome for mammals (e.g., humans) with cancer (e.g., breast cancer). For example, methods and materials for using the ratio of HOXB13 polypeptide expression to IL-17BR polypeptide expression to determine the likelihood of a breast cancer patient to experience breast cancer relapse or death are provided.

Abstract: This document provides methods and materials related to assessing the likely outcome for mammals (e.g., humans) with cancer (e.g., breast cancer). For example, methods and materials that involve assessing a breast cancer patient's cytochrome P450, family 2, subfamily D, polypeptide 6 (CYP2D6) genotype to determine the likelihood of the beast cancer patient to experience breast cancer relapse or death are provided. Methods and materials that involve assessing the likelihood that a breast cancer patient being treated with tamoxifen will experience side effects such as hot flashes also are provided.