HNRNPA3 and neoplasm: Heterogeneous nuclear ribonucleoprotein A3 (HNRNPA3) emerges as a potential regulator in tumor progression and immune modulation, yet its comprehensive role in BRCA remains uncharacterized.<h4>Methods</h4>We conducted an integrated multiomics analysis of HNRNPA3 in BRCA using data from TCGA, GEO datasets, single-cell RNA sequencing, and spatial transcriptomics.