The dermatologist on call is requested to visit the NICU to evaluate an infant born 12 hours earlier with a disseminated rash. Two punch biopsies are performed and a c-KIT positive infiltrate is noted in the dermis of each sample. What is the most likely diagnosis?

A. T cell lymphoma

B. Mastocytosis

C. Syphilis, congenital

D. B cell lymphoma

E. Neuroblastoma

To find out the correct answer and read the explanation, click here. 

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