In the present study we did not find significant differences in expression of PDGFR-α and PDGFR-β between high grade (II + III) and low grade (I) serous adenocarcinoma but coexpression of PDGFR-α and PDGFR-β in stromal cells was seen more often in serous than in non-serous adenocarcinoma. Here, PDGFRB is linked to serous adenocarcinoma.