MRCP2-1101
A 68-year-old man comes to the Outpatient Clinic complaining of right iliac fossa abdominal pain and watery diarrhoea that has been going on for 10 months. He used to be a heavy drinker, consuming 40 pints of beer a week, but has cut back to 1 pint a day for several years. Lately, he has noticed that his symptoms worsen when he drinks alcohol, so he has stopped completely. His wife has noticed that he has lost weight recently, but he cannot say how much. He has never smoked, but his wife has observed some episodes of wheezing. During the abdominal examination, a 3 cm hepatomegaly and an indistinct mass in the right iliac fossa were found. Although urea and electrolytes, liver function tests, and full blood count were normal, a small-bowel barium examination revealed a submucosal mass in the ileum. What is the probable diagnosis?