Posibleng Mga Sanhi para sa Microcephaly Growth Hormone Deficiency Cytomegalovirus Infection Gaucher Disease Down Syndrome Mucolipidosis Hyperphenylalaninemia Severe Combined Immunodeficiency Phenylketonuria Noonan Syndrome West Syndrome Homocystinuria sanhi ng Methylene Tetrahydrofolate Reductase Deficiency Pinsala sa Bungo Masakit na Ophthalmoplegia Matinding Mental Retardation Namamanang Angioedema Pheochromocytoma noong Kabataan