EFNA1 and breast carcinoma: The upregulation of EFNA1 has already been reported in a broad variety of cancers, for instance, a study has reported a higher transcription and expression of EFNA1 in breast cancer tissues than para‐cancerous tissues using the UALCAN database, elucidating the potential values of EPHA/EFNA family‐related pathways in predicting breast cancer.41