A 72-year-old Woman with Abdominal Pain, Nausea and Vomiting

A 72-year-old Woman with Abdominal Pain, Nausea and Vomiting

A 72-year-old woman presented with a 2-day history of abdominal pain associated with nausea and vomiting. Over the previous 10 years, she had had progressive Alzheimer’s disease, requiring her to live in a long-term care facility.

What’s the Diagnosis ?