Hegen H, et al. - Whether brain damage due to spontaneous subarachnoid hemorrhage (SAH) or intracerebral hemorrhage (ICH) induces reactivity against neuronal surface proteins was examined in this analysis. Participants in the study were subjects with spontaneous SAH and ICH who had cerebrospinal fluid (CSF) and serum sampling within 2 weeks after disease onset (baseline) and afterwards at least 10 days later (follow-up). Researchers reported that within the early disease course of spontaneous SAH and ICH, immunoreactivity against common neuronal surface proteins was not noted.