These tumor cells were perinuclear and strongly positive for cytokeratin (CAM5.2; Becton, Dickinson and Company, Franklin Lakes, NJ, USA) and GATA binding protein 3 (GATA3; Nichirei Biosciences Inc., Tokyo, Japan) but negative for T-box transcription factor (T-PIT; Sigma Life Science, St Louis, MO, USA) or steroidogenic factor 1 (SF1; Cosmo Bio Co. Ltd., Tokyo, Japan). This evidence concerns the gene GATA3 and neoplasm.