Case Presentation: A 21-month-old girl was brought to the emergency department for acute, severe right arm and leg weakness. She was unable to stand, appearing pale and fatigued. Labs were notable for hemoglobin (Hgb) of 3.5 g/dL, leukocyte of 19.7×103/µL, platelet of 340×103/µL, absolute reticulocyte of 6.4×103/µL, and MCV of 49 fL. Microcytic anemia and […]