Posterior reversible encephalopathy syndrome (PRES) is a complex clinical condition with a wide clinical spectrum. In this report two cases illustrate two different onsets. The first patient presented with general seizures, whereas the other presented with symptoms of pre-eclampsia, which developed into sudden blindness. Both patients had uneventful caesarean sections performed, with delivery of healthy children. Due to CT scans of the cerebrum, correct treatment and diagnosis were delayed in both cases, but subsequently, PRES was confirmed by MRI. Both patients were discharged in good health.