Summary

https://doi.org/10.1093/clinchem/hvz002

A 75-year-old retired engineer presented with a 2-year history of progressive difficulty recalling conversations and events. Over the past year, he stopped paying bills, managing medications, or driving. Six months ago, he experienced a sudden increase in agitation and aggression. He began to leave his home unaccompanied, becoming lost in his own neighborhood, requiring full-time supervision and assistance with activities of daily living.