A woman in her 50s was evaluated in an outpatient memory clinic and was found to have had progressive cognitive impairment for at least 1 year, based on a Mini-Mental State Examination score of 20 out of 30 possible points, with a poor verbal fluency score of 4, and a reduced delayed recall (5 of 10 drawings). Her family observed that she developed a progressive commitment to the functional activities of daily living. During her life, she had arterial hypertension, but it was controlled. Laboratory and neuroimaging investigations were being scheduled at ambulatory care; however, she was admitted to the emergency department with a sudden neurologic deficit. The neurologic examination identified hemiparesis and tactile hypoesthesia on her left side.