A 75-year-old man with congestive heart failure has been living in a long-term care facility for the past 2 years.

A 75-year-old man with congestive heart failure has been living in a long-term care facility for the past 2 years. His wife, who previously lived with him, passed away 2 months ago after an extended battle with breast cancer. The nurses report that he is getting around slower than usual, speaking slowly, and seems to have increasing trouble with his memory since his wife died. He is concerned about his memory, difficulty sleeping at night, and fatigue. He is no longer joining his friends for meals or card games, and on questioning, he states that he just does not feel like doing anything and no longer enjoys playing cards. He answers, “I don’t know” to most of your questions, including standard questioning for orientation. He is no longer caring for himself like he used to, and the nurses are having to assist more with his activities of daily living than he needed in the past. He has not been eating well and has lost about 15 pounds over the past couple of months. What is an appropriate diagnosis for this patient? Adjustment disorder Dementia Major depressive disorder Major neurocognitive disorder