The changes of CT findings at the level of the basal ganglia of Case 1 Figure 2 The ICP control was difficult when monitoring was started after the abnormal CT finding was discovered in Case 1, therefore, the maximum ICP was increased to 109 mmHg. ICP monitoring started before the presence of abnormal CT findings in Case 2 in which the maximum ICP was increased to 59 mmHg; however, the CPP could be maintained above 50 mmHg. This patient was the only case with mild sequelae among all our cases. Hospital days nificant influence on the pulmonary vascular permeability, as would a prodromal marker of ALI/ARDS. It is our supposition that this difference is a key point that would detect the etiology of HSES.