23rd August 2023

year-old male presents to the emergency department with severe generalised abdominal pain, nausea, and vomiting

A 40-year-old male presents to the emergency department with severe generalised abdominal pain, nausea, and vomiting. He has a history of chronic alcohol abuse and peptic ulcer disease. On examination, his abdomen is rigid, and he has a fever of 38.5°C.

Which of the following is the most likely diagnosis?