Table 3.

Potential discriminatory value of GATA3 immunohistochemistry in tumor diagnosis –examples of contrasting pairs of tumors with potential morphologic mimicry.

Positive tumors	Negative tumors
Metastatic lobular carcinoma of the breast	Gastric/intestinal signet ring cell carcinoma
Metastatic ductal carcinoma	Pulmonary/gastrointestinal/ovarian carcinoma
Urothelial carcinoma	Prostate carcinoma
Squamous carcinoma of skin origin	Squamous carcinoma of pulmonary origin
Malignant mesothelioma	Pulmonary adenocarcinoma
Pancreatic adenocarcinoma	Gastrointestinal adenocarcinoma Cholangiocarcinoma
Chromophobe renal carcinoma	Clear cell renal carcinoma
Endodermal sinus tumor Choriocarcinoma	Embryonal carcinoma, Seminoma
Paraganglioma	Neuroendocrine carcinoma