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retardation sufficient to fall outside the normal range of intelligence abnormality , mental defectiveness
extreme mental retardation amentia , idiocy
inherited disorder of metabolism in which the urine has a odor characteristic of maple syrup; if untreated it can lead to mental retardation and death in early childhood branched chain ketoaciduria , maple syrup urine disease
congenital disorder causing mental retardation Down syndrome
congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation Down's syndrome , Down syndrome , mongolianism , mongolism , trisomy 21
hereditary disease (autosomal recessive) consisting of an error is mucopolysaccharide metabolism; characterized by severe abnormalities in development of skeletal cartilage and bone and mental retardation dysostosis multiplex , gargoylism , Hurler's disease , Hurler's syndrome , lipochondrodystrophy
retardation more severe than a moron but not as severe as an idiot imbecility
syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation; a genetic defect in which an extra X chromosome (XXY) is present in the male Klinefelter's syndrome , Klinefelter syndrome , XXY-syndrome
inborn error of metabolism in which the lack of certain enzymes leads to an inability to metabolize the amino acid lysine; characterized by muscular weakness and mental retardation lysinemia
mild mental retardation mental deficiency , moronity
congenital defect of the central nervous system in which a sac containing part of the spinal cord and its meninges protrude through a gap in the vertebral column; frequently accompanied by hydrocephalus and mental retardation myelomeningocele
congenital malformation of the skull which is long and narrow; frequently accompanied by mental retardation scaphocephaly
autosomal recessive defect in tyrosine metabolism resulting in liver and kidney disturbances and mental retardation tyrosinemia
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