Improvement in Non-Pulmonary CFTR-Related Symptoms in a Patient With p.Phe508del/p.Arg117His (7T) Cystic Fibrosis Treated with Ivacaftor

Introduction: Diagnosis and management of CRMS/CFSPID and cystic fibrosis (CF) with mild phenotypes remains challenging, and this extends to expanding practice with the use of CFTR modulators. Case: We describe a case of an 18-year-old man with p.F508del/p.Arg117His(7T) initially presenting with CRMS/CFSPID. He went on to be diagnosed with pancreatic sufficient CF with minimal lung disease and no bronchiectasis. However, he has had significant CFTR-related symptoms with recurrent pancreatitis and chronic sinusitis. These non-pulmonary symptoms resolved following introduction of the CFTR modulator ivacaftor. Discussion/ Conclusion: Diagnosis and follow up of CRMS/CFSPID infants remains challenging, with most guidelines based on consensus opinion. Care for those with mild CF phenotypes, CRMS/CFSPID and those with CFTR-RD must be individualised, and open dialogue, education and patient centred care is necessary to ascertaining which patients might benefit from management in a multidisciplinary CF clinic and treatment. There may be a role for expanding the use of CFTR modulators to include non-pulmonary manifestations of CFTR dysfunction in some cases.