system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 5 month-old boy with no significant past medical, surgical, or family history is brought the pediatrician by his parents for a new rash. The parents state that the rash started several weeks earlier and has not changed. The boy has breastfed since birth and started experimenting with soft foods at the age of 4 months. Physical examination reveals erythematous plaques with shiny, yellow scales over the scalp and external ears. Vital signs are within normal limits. Complete blood count is as follows:
WBC  8,300 cells/ml3
Hct 46.1%
Hgb 17.1 g/dL
Mean corpuscular volume (MCV) 88 fL
Platelets 242
Which of the following is the most likely diagnosis?
assistant
Infantile seborrheic dermatitis