A recent study, based on antibody-suspension bead arrays, demonstrated that NfM is elevated in frontotemporal dementia CSF.88 Furthermore, in an earlier study, high levels of NfM were observed in amyotrophic lateral sclerosis plasma.89 Further research is required to establish any potential utility of NfM as a biomarker for frontotemporal dementia and amyotrophic lateral sclerosis. The gene discussed is NEFM; the disease is amyotrophic lateral sclerosis.