title: Night blindness in a teenager with cystic fibrosis.
abstract: This article describes the case of a 16-year-old boy with cystic fibrosis who presented with difficulty seeing in the dark. He had a history of bowel surgery at birth, and he developed cystic fibrosis liver disease and osteopenia during his teenage years. He always had good lung function. When his serum vitamin A level was checked, it was undetectable in sample. He was diagnosed with night blindness and commenced on high-dose vitamin A. His symptoms resolved within 3 days. However, it took over 1 year for his vitamin A level to return to normal. This case emphasizes the importance of monitoring vitamin levels in cystic fibrosis to detect deficiency and prevent long-term consequences, and it highlights the challenges encountered during the course of night blindness treatment.
authors.affiliation: Adelaide and Meath Hospital, Dublin, Ireland. marie.roddy@amnch.ie
authors.forename: Marie Frances
authors.initials: MF
authors.lastname: Roddy
authors.forename: Peter
authors.initials: P
authors.lastname: Greally
authors.forename: Geraldine
authors.initials: G
authors.lastname: Clancy
authors.forename: Gerardine
authors.initials: G
authors.lastname: Leen
authors.forename: Sinead
authors.initials: S
authors.lastname: Feehan
authors.forename: Basil
authors.initials: B
authors.lastname: Elnazir
mesh_terms: D000293:Adolescent; D003550:Cystic Fibrosis / Q000150:complications / Q000188:drug therapy / Q000503:physiopathology*; D019587:Dietary Supplements; D006801:Humans; D008297:Male; D009755:Night Blindness / Q000150:complications / Q000188:drug therapy / Q000503:physiopathology*; D016896:Treatment Outcome; D014801:Vitamin A / Q000097:blood / Q000627:therapeutic use; D014802:Vitamin A Deficiency / Q000097:blood / Q000188:drug therapy
chemical_list: D014801:Vitamin A