| ICD9 = | ICDO = | Image = IMGP2147.JPG | Caption = Boy with microcephaly surrounded by his classmates| OMIM = 251200 | OMIM_mult = | MedlinePlus = | eMedicineSubj = | eMedicineTopic = | DiseasesDB = | MeshID = 22629 | }} Microcephaly's a neurodevelopmental disorder in which the circumference of the head's more than two standard deviations smaller than average for the person's age and sex. Microcephaly may be congenital or it may develop in the first few years of life. The disorder may stem fr… (More on Microcephaly)