==Staining==
{{Routine staining}}
Routine immunohistochemistry usually include estrogen and progesterone receptors (ER, PR) and HER2.<ref>{{cite journal |vauthors=Williams SL, Birdsong GG, Cohen C, Siddiqui MT |title=Immunohistochemical detection of estrogen and progesterone receptor and HER2 expression in breast carcinomas: comparison of cell block and tissue block preparations |journal=Int J Clin Exp Pathol |volume=2 |issue=5 |pages=476–80 |date=2009 |pmid=19294006 |pmc=2655151 |doi= |url=}}</ref>
==Microscopic evaluation==