Posterior reversible encephalopathy syndrome in a patient with HELLP syndrome complicating a triploid pregnancy.

Posterior reversible encephalopathy syndrome (PRES) is a rare-and not always reversible-neurological complication associated with pre-eclampsia. We report a highly unusual case of puerperal PRES occurring in the context of pre-eclampsia arising from a previously undiagnosed triploid pregnancy at 16 weeks gestation.