AKT-2423

A 28-year-old man visits his General Practitioner with complaints of abdominal pain, bloating and nausea after meals. He has also experienced a weight loss of around 10 kg in the past three months, along with some non-bloody diarrhoea. He is a heavy smoker, consuming 30 cigarettes per day, but doesn’t consume alcohol. A previous plain abdominal X-ray revealed dilated loops of the small bowel. What is the most probable diagnosis?