The distribution of CK7 negative tumors in ductal cancers was not associated with tumor grade (P = 0.7565), while more GATA3 negative tumors occurred in Grade 3 ductal cancers than those in Grade 1 and Grade 2 tumors, 27% vs. 6% (P < 0.0001) (Table 3). The gene discussed is KRT7; the disease is neoplasm.