2 Micro and Macrocephaly

Micro and Macrocephaly

Microcephaly : > 3 SD below mean

Macrocephaly : > 2 SD above mean

Newborn Head circumference - 35 cm , By 2year sge - it reaches 48cm (i.e 90% of adult head circumference is achieved in 2yr)

Other causes of Microcephaly :
  • Familial (AR)
  • Down's syndrome
  • Edward syndrome
  • PEM
  • HIE
  • Hypoglycemia
  • Fetal Alcohol syndrome
  • Fetal hydantoin syndrome

MedicoNotebook - Founder : DrShiviMudgal , Co-Founder : DrAyushGoel


  1. All the white matter diseases mentioned here are also called Leucodystrophies.
    And the one's among these leucodystrophies, with microcephaly can have normal head size too.

  2. Nice work. thank you


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