Negative correlations were consistently observed between HYAL1 mRNA expression levels and those of ERα and PR in clear cell and mucinous ovarian cancer subtypes (r values for HYAL1 correlation with ERα in clear cell and mucinous EOCs were respectively −0.461 and −0.310 in the Q-PCR analysis and −0.595 and −0.467 in the microarray; r values for HYAL1 correlations with PR in clear cell and mucinous EOCs were respectively −0.215 and −0.429 in the Q-PCR analysis and −0.500 and −0.352 in the microarray) (see bold fonts in Supplemental Table S1). This evidence concerns the gene PGR and mucinous ovarian cancer.