Amnesia, dissociative disorders and delirium Quiz: Ace Your Exams

A 78-year-old individual presents to the neurologist for follow-up evaluation after suffering a subdural hemorrhage following a fall. The patient was recently released from inpatient rehabilitation after a long course in the hospital following hematoma evacuation. The patient’s daughter reports that the patient has regained a lot of the strength on the right side but still isn’t as “sharp” as they used to be. The patient’s daughter reports that the patient was wandering around the neighborhood yesterday and couldn’t remember where they lived. The patient’s other medical history includes diabetes, hypertension, and hypercholesterolemia. Vitals are within normal limits. Mental status examination demonstrates the patient is only oriented to self and does not recall the time, date, or current season. When asked which family member is in the clinic with the patient, the patient is unable to provide an answer. At the beginning of the clinic visit, the patient was asked to remember the words “apple, tree, and pen,” which the patient is able to recall at the end of the visit. Which of the following is the most likely diagnosis?