Two monogenic disorders masquerading as one: Severe congenital neutropenia with monocytosis and non-syndromic sensorineural hearing loss

We report a large family with four successive generations, presenting with a complex phenotype of severe congenital neutropenia (SCN), partially penetrant monocytosis, and hearing loss of varying severity. We performed whole exome sequencing to identify the causative variants. We identified and classified a pathogenic GFI1 variant and a likely pathogenic variant in MYO6 which together explain the complex phenotypes seen in this family.EGA study EGAS00001004176