A 9 month old boy presents for review，there is a concern about his headcircumferenc. The neurological and developmental assessments are normal. Which of the following is the most useful additional information on history to support the diagnosis of benign familial macrocephaly

  • A: Absence of neurocutaneous stigmata
  • B: Parental head circumference
  • C: Head circumference at birth
  • D: Exposure to congenital infections
  • E: Gestational age at birth

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