Case Presentation: A 20-day-old female former full-term, appropriate for gestational age infant presented to the pediatrician’s office for her first checkup. She was born via uncomplicated vaginal delivery following a normal pregnancy and had normal newborn screening results. She was exclusively breastfed. She was found to be 27% below birth weight and was therefore urgently [...]

Case Presentation: A previously healthy 59-year-old male with newly-diagnosed hypertension and prediabetes presented to the emergency department following an unwitnessed syncopal episode on standing. He was found to have significant electrolyte abnormalities with critical values of potassium at 2.5, magnesium at 1.4, calcium at 6.3, phosphorus at 1.8, and a nonanion gap metabolic acidosis with [...]