A medical student working in the emergency department sees a baby girl born two weeks ago, who is brought in by her anxious mother. The mother tells the student that her baby seems “purple,” especially her fingers and toes, and looks extremely blue when crying. On physical examination, the sleeping baby has mild cyanosis of the face and trunk, but moderate cyanosis of the extremities. ##Disclaimer## The content provided on Docplexus is intended for educational purposes only.

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