Study subject - macrocephaly (IMAGE) University of Leeds Caption One of the children in the study. Macrocephaly is a condition descrtibing an enlarged head circumference. Credit University of Leeds Usage Restrictions Please credit University of Leeds License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.