In both the SCAN-B cohort and in Cohort270 higher levels of IGHA2 or IGJ mRNA were associated with improved survival whereas this was not the case for IGHG1. We also utilized the Kaplan–Meier plotter35, which is an assembly of several breast cancer cohorts analyzed by microarray technology and thus enables analysis of a large number of breast cancer cases. Here, IGHA2 is linked to breast carcinoma.