AKT-2424

A 58-year-old woman comes to her General Practitioner with complaints of diarrhoea without any associated bleeding. She has also experienced weight loss and has abdominal pain with malaise and fever. During the examination, she has oral ulcers, sore red eyes and tender nodules on her shins. There is tenderness in the right iliac fossa and a vague right iliac fossa mass. What is the most probable diagnosis?