According to a study conducted by Terry et al., the risk of developing hemorrhagic stroke in children (including SAH and ICH) was 7 for every 1000 Nf1 patients, while in the general population it was only 0.5 every 1000 children (OR 6.3, with an OR of 8.1 for ICH) [27]. Here, NF1 is linked to hemorrhagic stroke.