Patient History: A 22-year-old woman complains of tiredness for 6 months. Her only other symptom is a gradual increase in the frequency of bowel movements from once a day in her teens to two to three times daily. She has no abdominal pain and has no change in appetite. She is a non-smoker and drinks rarely. She has been a vegetarian for 5 years but eats dairy foods and fish regularly. Physical Examination: She is 5 ft 4 in.
tall and weighs 49 kg. She looks a little pale and thin. Examination of her abdomen showed no abnormalities, and there are no other significant abnormalities to find in any other system. Laboratory Findings: What is the likely diagnosis and how will you confirm it? *This case is from Docplexus Editorial Team for educative purpose only Source: 100 Cases in Clinical Medicine