Stanek J - The placental phenotypes underwent an exploratory analysis in this trial, in hypertensive conditions of pregnancy, with the inclusion of placental hypoxic lesions and lesions of shallow placentation. Severe preeclampsia could present as a placental disease and mild preeclampsia more of a maternal disease, based on placental pathology. Nonetheless, the substantial overlap among the groups did not make the variation absolute. The conditions could be regarded as “occult preeclampsia", possibly indicated via the occurrence of decidual arteriolopathy in gestational hypertension and chronic hypertension.