Fig. 3From: Complete response to combination therapy using nivolumab and ipilimumab for metastatic, sarcomatoid collecting duct carcinoma presenting with high expression of programmed death-ligand 1: a case reportImmunostaining of collecting duct carcinoma components from the nephrectomy specimens (original magnification ×100). Tissue sections were stained with antibodies against a CK-AE1/AE3, b CK7, c CK20, d CK-34β1E12, e GATA3, f p63, and g PAX8. Brown coloring indicates positive antibody staining. h Hematoxylin and eosin-stained sectionsBack to article page