Localization of Tamoxifen in Human Breast Tumor by MALDI Mass Spectrometry Imaging
Background: Tamoxifen is used in endocrine treatment of breast cancer to inhibit estrogen signaling. A set of strati‐ ed ER‐positive and ER‐negative tumor sections was subjected to manual deposition of tamoxifen solution in order to investigate its spatial distribution upon exposure to interaction within thin tissue sections. Methods: The localization of tamoxifen in tumor sections was assessed by