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Increased head circumference - Overview

Alternative Names

Macrocephaly

Definition of Increased head circumference:

Increased head circumference is when the measured distance around the widest part of the skull is larger than expected for the child's age and background.

Considerations:

A newborn's head is usually about 2 centimeters larger than the chest size. Between 6 months and 2 years, both measurements are about equal. After 2 years, the chest size becomes larger than the head.

A series of measurements over time that show an increased rate of head growth often can provide more valuable information than a single measurement that is larger than expected.

Increased pressure in the head (increased intracranial pressure) often occurs with increased head circumference. Symptoms of this condition include:

See also: Bulging fontanelles

Common Causes:

  • Reviewed last on: 5/1/2011
  • Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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