A previously healthy 4-year-old female presented to the Emergency Department complaining of sudden-onset rightlower-quadrant abdominal pain that awoke her from sleep. The pain was constant, non-radiating and severe. She denied trauma, dysuria, hematuria, nausea, vomiting, diarrhea, constipation or hematochezia. Her vitals were HR: 92, RR: 16, BP: 116/76 and T: 37.0 °C. Physical exam revealed te...