An elderly patient is suddenly confused, fluctuating, with a urinary tract infection. What is the likely diagnosis?

Answer and explanation

Correct answer: C. Delirium, with treatment of the cause

  1. Step 1: An acute onset with fluctuation is typical of delirium. Step 2. Infection is the trigger, so it is treated. Answer: delirium. Why not the others: dementia develops slowly.

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