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Case Lab · Type B · Boundary

F00

Smooth decline, or one step at a time?

Deepak, 70, has shown a slow, steady decline in memory and word-finding ability over the past two years, according to his wife, with no single dramatic change she can point to. He has no history of stroke, no diagnosed hypertension or diabetes, and no focal weakness or gait problem on examination. His decline has been the same gradual trajectory throughout, without periods of stability followed by sudden drops.

What is the best-supported classification?