A 25-year-old has bloody diarrhoea with urgency, and the inflammation is continuous from the rectum. What is the most likely diagnosis?
Answer and explanation
Correct answer: A. Ulcerative colitis
- Step 1: The picture of continuous inflammation starting at the rectum fits Ulcerative colitis.
Answer
Ulcerative colitis.
Why not the others: 'Crohn disease': it has skip lesions and transmural inflammation with granulomas. 'Infective colitis': it follows a short diarrhoeal illness with positive stool culture. 'Irritable bowel syndrome': it gives abdominal pain and altered bowel habit without blood or weight loss.
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