PIEZO1 and macrocytic anemia: Two patients with mild macrocytic anaemia had mutations in the gene encoding the piezo‐type mechanosensitive ion channel component 1 (PIEZO1): Patient 7 bore a previously described pathogenic p.R2456H variant (Zarychanski et al, 2012), and Patient 8 a novel p.Q1361R mutation located adjacent to the already known p.R1358P mutation (Table 1) (Albuisson et al, 2013).