USMLE Step 1 Question of the Day
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Question:
An elderly man who lives alone is brought to the emergency room in a confused state. He is found to have diarrhea and a pruritic rash. Which of the following nutritional deficiencies is most likely responsible for his symptoms?
Correct Answer: B. Vitamin B3
Lack of vitamin B3 (niacin) (Choice B), can cause Pellagra, which is characterized by altered mental status, dermatitis and diarrhea, and if left untreated, death.
Vitamin B1 (thiamine) deficiency (choice A) can cause Beriberi, characterized by polyneuritis, muscle wasting and/or dilated cardiomyopathy, and Wernicke-Korsakoff syndrome, characterized by anterograde amnesia.
Vitamin B6 (pyridoxine) deficiency (choice C) causes peripheral neuropathy, convulsions and hyperirritability.
Vitamin C (ascorbic acid) deficiency (choice D) leads to scurvy, characterized by swollen gums, easy bruising, and poor wound healing.
Vitamin D deficiency (choice E) is characterized by osteomalacia in adults (and rickets in children). The patient may have presented with a fracture in this case.
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Category: BiochemistryAn elderly man who lives alone is brought to the emergency room in a confused state. He is found to have diarrhea and a pruritic rash. Which of the following nutritional deficiencies is most likely responsible for his symptoms?
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