Unraveling a Sun-Sensitive Rash

A 48-year-old woman presents with diarrhea, weight loss, and a distinctive rash on sun-exposed areas. Explore this classic case of Vitamin Deficiency.

Pellagra


A 48-year-old woman who lived in rural India presented with diarrhea, weight loss, and a rash. Physical examination showed well-demarcated areas of hyperpigmentation on the sun-exposed areas of her neck, chest, and forearms. What is the most likely diagnosis?

What is the most likely diagnosis?

Cobalamin (vitamin B12) deficiency
Pellagra
Phytophotodermatitis
Porphyria cutanea tarda
Zinc deficiency

Casal’s Necklace, Dermatitis, Niacin Deficiency, Pellagra, Vitamin B3

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