pediatrics
Microcephaly
Introduction
Microcephaly is a head circumference<2 standard deviations below the mean for age. (See also Introduction to Congenital Craniofacial and Musculoskeletal Abnormalities and In microcephaly, the head is disproportionately small in relation to the rest of the body. Microcephaly has many chromosomal or environmental causes, including prenatal Prenatal Drug Exposure , The consequences of microcephaly itself include neurologic and developmental disorders (eg, Seizure Disorders , 