]> 2026-07-31T09:40:24+00:00 WBR0173 0 en Pernicious anemia Bacterial overgrowth syndrome Pancreatitis Low vitamin B12 intake Malabsorption Pathology A 28-year-old woman presents to the physician's office with complaints of excessive fatigue and pallor. Following appropriate work-up, you diagnose her with megaloblastic anemia, with low vitamin B12 levels. As part of her work-up, the patient is instructed to drink a preparation containing radio-labeled vitamin B12. One hour later, she receives a second dose of vitamin B12 as an intramuscular injection. Over the next 24 hours, the patient collects her urine for analysis which shows more 35% radioactive vitamin B12 by radiotelegraph. What is the most likely diagnosis in this patient? D Gastrointestinal 2020-10-27T23:35:41Z 2459150.4831134 WBR0173