Posterior reversible encephalopathy syndrome (PRES) is more commonly described in adult population, especially during hypertensive emergencies. The causes such as the use of immunosuppressive drugs, e.g., cyclosporine, tacrolimus, patients suffering with SLE, hemolytic uremic syndrome, and thrombocytopenic thrombotic purpura and post-bone marrow or stem cell transplantation also predispose an adult patient to development of PRES.2 Children suffering from renal disease or on chemotherapy are at an equal risk. PRES following head injury has been reported only once in the literature after brain surgery.
https://www.jmedsciences.com/doi/JMEDS/pdf/10.5005/jp-journals-10045-00134