A mother of a 2-week old infant is worried about a new “red bump” that appeared on his left arm a few days ago. She noticed a lightened area was present before the “red bump” appeared. There is no history of trauma. Physical exam reveals an afebrile, well-appearing child. Located on the dorsal aspect of his left forearm, is a bright red nodule with speckled telangiectasias, 1cm in diameter. Which of the following is the most likely diagnosis:
A mother of a 2-week old infant is worried about a new “red bump” that appeared on his left arm a few days ago...
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