MRCP2-1770
A 45-year-old man presents with symptoms of diarrhoea and abdominal pain. He reports passing pale, bulky stools two to three times per day for several months. Additionally, he has been experiencing severe, intermittent central abdominal pain for the past two years, which occasionally radiates to his back. He has a history of smoking 35 cigarettes per day for 30 years and drinking 7 to 8 cans of cider daily. He has also lost 6 kilograms in weight over the last year. On examination, his bedside capillary blood glucose measurement is 11.2 mmol/l. What is the most appropriate diagnostic test for this patient?