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  • Title: Incidence of fibrosing colonopathy with pancreatic enzyme replacement therapy in patients with cystic fibrosis.
    Author: Chiuve SE, Fife D, Leitz G, Peterson C, Campbell NM, Rennig A, Rodrigues L, Decktor D, Dowd C, Marshall BC, Borowitz D.
    Journal: J Cyst Fibros; 2023 Nov; 22(6):1017-1023. PubMed ID: 37880023.
    Abstract:
    BACKGROUND: High daily doses of pancreatic enzyme replacement therapy (PERT) were historically associated with risk of fibrosing colonopathy (FC) in people with cystic fibrosis (pwCF), leading to development of PERT dosing guidelines and reformulated products. This study quantified incidence of FC in pwCF treated with PERT following those measures. METHODS: This large prospective cohort study included eligible pwCF enrolled in the Cystic Fibrosis Foundation Patient Registry with ≥1 clinic visit in 2012-2014 and follow-up through 2020. Data on PERT exposure, demographics, and medical history were collected. Clinical data, imaging, and histopathology of suspected cases were examined by an independent adjudication panel of physicians familiar with this complication. RESULTS: Base Study Population included 26,025 pwCF who contributed 155,814 person-years [mean (SD) 6.0 (2.0) years] of follow-up. Over 7.8 years, 29 pwCF had suspected FC; three cases were confirmed by adjudication, 22 cases were confirmed as not FC, and four cases were indeterminate. There were 22,161 pwCF exposed to any PERT, with mean PERT use time of 5.583 person-years and mean daily dose of 8328 U lipase per kg per day. All three confirmed cases and four indeterminate cases of FC occurred during current use of PERT. Incidence rates per 1000 person-years exposed were 0.0242 (95 % CI [0.0050, 0.0709]) for confirmed FC and 0.0566 (95 % CI [0.0227, 0.1166]) for indeterminate or confirmed FC. CONCLUSIONS: The incidence of FC in pwCF is very low in the era of current treatment guidelines and more stringent quality standards for PERT products.
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