What is Microcephaly?
Microcephaly is a rare condition in which the circumference of an infant or child's head is smaller than normal. A child's head is considered abnormally small if it is two standard deviations from the median (average) size for their age and gender. In some cases, the forehead is narrow and sloping and the back part of the head is flat.
Microcephaly may occur as an isolated defect or as part of a more complex syndrome. Diagnosis can be made through well-baby head measurements, X-rays, and ultrasound.