Triulzi et al. (2019) performed a transcriptome profiling analysis of archival formalin-fixed paraffin embedded (FFPE) tumour blocks from HER2+ samples treated with adjuvant trastuzumab, finding a correlation between trastuzumab-sensitive tumours and higher expression of chemokines such as CCL2, in contrast to trastuzumab non-sensitive tumours. Here, ERBB2 is linked to neoplasm.