In this whole genome expression study on blood cell mRNA from ovarian cancer patients, only six genes, PDIA3, CYP1B1, LYAR, NOP14, NCALD, and MTSS1 showed a statistically significant difference in expression between subjects with tumors that were poorly differentiated vs. those who had moderately to well differentiated tumors. The gene discussed is PDIA3; the disease is ovarian carcinoma.