The differences in the nuclear grades between diploid/CIN- and aneuploid/CIN+ breast cancers. Grade 1 tumors were more frequently seen in diploid/CIN- carcinomas than in aneuploid/CIN+ carcinomas (p = 1.601×10-12). In contrast, grade 3 tumors were much more common in aneuploid/CIN+ tumors than in diploid/CIN- tumors (p = 5.285×10-20). The incidence of grade 2 tumors was significantly different between these two types of tumors with different genomic characteristics (P = 2.281×10-3). White column; grade 1 tumors, gray column; grade 2 tumors, and black column; grade 2 tumors.