Letter to Editor: Apocrine carcinoma is the fact. Comment on the recent paper entitled "Invasive apocrine carcinoma of the breast: Myth or fact?" by Gurrado et al (Breast J. 2019 Sep 8. doi: 10.1111/tbj.13569. [Epub ahead of print].

Abstract

The most recent WHO classification of breast cancer also recognizes the concept of “pure apocrine carcinoma” (called carcinoma with apocrine differentiation) with cancers having >90% of apocrine morphology (an essential criterion) and ER‐negative, AR‐positive immunoprofile as a desirable criterion.