A 4-Week-Old Boy Is Brought to the Office for His

A 4-week-old boy is brought to the office for his first well-child visit.  The patient was born at 38 weeks gestation to a 27-year-old woman following an uncomplicated pregnancy and delivery.  He has been exclusively breast-fed since birth and has had normal urine and stool output.  The patient takes supplemental vitamin D and no other medications.  His 4-year-old brother has neurofibromatosis but is otherwise healthy.  The patient is well-appearing and vigorous.  His weight and length are at the 50th percentile.  There is a 5-cm skin lesion with overlying hair on the upper back, as shown below.  The remainder of the skin examination is unremarkable.  Which of the following is the most likely diagnosis for this patient?

A) Café au lait macule
B) Congenital dermal melanocytosis
C) Congenital melanocytic nevus
D) Nevus flammeus
E) Nevus simplex
F) Superficial infantile hemangioma

Correct Answer:

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