Having a tumor that expressed receptors for both ER and PR (PP) was associated with better OS than was having a tumor that expressed receptors for neither (NN) (HR 0.17, 95% CI 0.08-0.39, P < 0.001), whereas having a tumor that expressed receptors for only one (NP) did not influence survival status (Table 2). The gene discussed is PGR; the disease is neoplasm.