MSRA-0800

A 72-year-old male presents to the emergency department with complaints of new-onset pain in his left groin. Upon examination, a large, warm, non-reducible mass located inferolateral to the pubic tubercle is observed, accompanied by erythema of the overlying skin. The patient reports vomiting twice and passing stools with blood mixed in them once. He appears to be in pain and is sweating profusely. His medical history includes peptic ulcer disease, which is managed with omeprazole. What is the most likely diagnosis?