Deirdre Nolfi-Donegan, MD; Erika Friehling, MD

A 9-week-old, full-term female infant presented to the hospital with new onset fevers, irritability, and tachycardia. Her temperature was 38.9 degrees Celsius, heart rate 180 beats per minute, respiratory rate 32 breaths per minute, and blood pressure 111/76 mmHg. Her weight was in the third percentile (4010 g), and her height was in the second percentile (52.8 cm). On exam, she was well-proportioned, nondysmorphic without hepatosplenomegaly. She had a full head of hair with no obvious skeletal or skin abnormalities.

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