A 50-year-old male with a history of gastric bypass surgery presents with fatigue, pale skin, and pica (craving and eating non-food substances like ice or dirt). Laboratory tests show a haemoglobin level of 85 g/L, transferrin saturation of 4% and serum ferritin level of 15 mcg/L. The diagnosis in this case was iron deficiency anaemia due to malabsorption after gastric bypass surgery. His symptoms improved after two infusions of intravenous iron.
