Although SSAO‐mediated deamination of methylamine to formaldehyde in mice susceptible to AS may constitute a potential inducer of AS as described previously,51 no statistically significant difference in plasma SSAO activity was observed in 68 patients with stroke and cerebral thrombosis or cerebral infarction compared with that in healthy individuals without stroke.62 Here, AOC3 is linked to intracranial thrombosis.