15th February 2025

You assess a 48-year-old man in the Emergency department with chronic abdominal pain.

You assess a 48-year-old man in the Emergency department with chronic abdominal pain. From his records, you note he has attended 4 different Emergency departments in the area with this presentation in the last 7 months.

During this time, he has had extensive investigations, including by the outpatient Gastroenterology team:

Stool calprotectin: negative

Faecal Immunochemical Test: negative

OGD successfully passed to caecum with no abnormalities found

They have discharged him with no abnormal findings and no follow up planned. 

On review, he is very worried about the pain and shows you a detailed diet diary. He is active and able to mobilise without much noticeable discomfort.

What is the most likely diagnosis?

Select the SINGLE most appropriate option from the list below. Select ONE option only.