Chalazion and hordeolum in paediatric patients with cystic fibrosis on elexacaftor/tezacaftor/ivacaftor.

In the era of cystic fibrosis transmembrane conductance regulator (CFTR) modulators, we have seen impressive improvements to quality of life and life expectancy in people with cystic fibrosis (pwCF). However, there have been emerging adverse events related to elexacaftor/tezacaftor/ivacaftor (ETI). We present 8 paediatric pwCF who developed chalazion/hordeolum on standard dosing of ETI, of which one third needed interruption of ETI therapy to achieve resolution. This report highlights a 5.5-fold increased incidence of chalazion/hordeolum in pwCF and raises concerns of a clinical association between ETI and chalazion/hordeolum.