NFIB and adrenocortical carcinoma, hereditary: This group includes the well-characterized adenoid cystic carcinoma (AdCC) and secretory carcinoma, underpinned by MYB–NFIB and ETV6–NTRK3 fusion genes, respectively.77,78 Additional lesions rarely occurring in the breast, yet comprehensively studied when arising in the salivary glands, can tentatively be included in this subgroup, such as the polymorphous low-grade adenocarcinoma and mucoepidermoid carcinoma, which are characterized by PRKD1 hotspot mutations79 and MAML2 rearrangements,80 respectively.