Fig. 1From: HNF4A expression as a potential diagnostic tool to discriminate primary gastric cancer from breast cancer metastasis in a Brazilian cohortRepresentative immunohistochemistry results from the patient cohorts. a Invasive ductal carcinoma (IDC) (left) with mucin differentiation area (right). b Invasive lobular carcinoma (ILC) (left) associated with “in situ” lobular carcinoma (right). c Poorly differentiated primary gastric adenocarcinoma with signet ring cells (stomach). d Details at 20X magnification. e HNF4A staining in primary gastric adenocarcinoma. Nuclear staining in a non-neoplastic gland (left): internal control and nuclear staining in poorly differentiated gastric carcinoma cells with signet ring cells. f Metastasis from ILC to gastric mucosa. HNF4A nuclear staining in gastric cells from mucosa and non-staining from ILC cellsBack to article page