Published 3 years after a meta‐analysis based on blood NfL levels in CIS (n = 381) (Forgrave et al., 2019), the 2022 meta‐analysis1 pooled CSF NfL and blood NfL data from subjects with MCI (n = 676) and controls (n = 504) (Zhang et al., 2022). Here, NEFL is linked to in situ carcinoma.