A 6-year-old boy with cystic fibrosis presents with difficulty seeing in dim light and night blindness over the past 2 months. Vital signs: BP 95/60, HR 98, RR 22, Temp 37°C, SpO2 98% on room air. Examination reveals dry conjunctivae with foamy Bitot's spots on the temporal sclera. Serum retinol level is 15 µg/dL (normal >20 µg/dL). No signs of corneal scarring are noted. Which vitamin deficiency most likely explains these findings?
- A)Vitamin E
- B)Vitamin C
- C)Niacin
- D)Vitamin D
- E)Vitamin AGABARITO
Explicação
This child has vitamin A deficiency causing night blindness and xerophthalmia with Bitot spots. Fat malabsorption in cystic fibrosis predisposes to deficiency of fat soluble vitamins, and retinol is required for maintenance of epithelial tissues and for the vi... Ver explicação completa e trilha adaptativa →