With regard to the expression level of HTR2A, except for its overexpression in fibroadenoma (FC = 2.075, the Sorlie Breast Statistics), it was downregulated in male breast carcinoma (FC = -3.289), invasive breast carcinoma (FC = -3.808), mixed lobular and ductal breast carcinoma (FC = -3.484), intraductal cribriform breast adenocarcinoma (FC = -3.675), invasive lobular breast carcinoma (FC = -3.063), invasive ductal breast carcinoma (FC = -3.963), invasive ductal and lobular carcinoma (FC = -3.972) and mucinous breast carcinoma (FC = -4.763, TCGA breast statistics). Here, HTR2A is linked to breast ductal adenocarcinoma.