Brief Research ReportPublished 13 April 2026Amyotrophic lateral sclerosis and chronic inflammatory demyelinating polyneuropathy coexistence in a patient with a C9orf72 variant: case reportChristopher File · Anthony M. Price · Rowaid Ahmad · Elena Shanina · Ruiqing L. SunFrontiers in Dementiadoi 10.3389/frdem.2026.1785124