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2,069 Possible Causes for Severe Mental Retardation, (if Untreated)

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  • Phenylketonuria

    There is evidence in the literature which suggests that adults with previously untreated phenylketonuria (PKU) benefit from a low phenylalanine diet.[] Untreated patients usually exhibit severe mental retardation and poor motor function, with characteristic T2 white matter signal abnormalities on conventional MR images.[] Abstract Left untreated, phenylketonuria biochemically results in high phenylalanine concentrations in blood and tissues, and clinically especially in severe mental retardation[]

  • Hyperphenylalaninemia

    Abstract Three siblings with hyperphenylalaninemia were described, who showed convulsions and severe mental retardation despite dietary control of blood phenylalanine.[] Except for SGA, all neonatal sequelae were more frequent in untreated pregnancies.[] Phenotypes can vary from mild hyperphenylalaninemia to a severe phenylketonuria wich, if untreated, results in severe mental retardation.[]

  • Classical Phenylketonuria

    If the phe level gets too high, it can damage the brain and cause severe mental retardation.[] If untreated, the condition leads to general learning disability, usually developing in the first year of life.[] If left untreated this disease can cause severe mental retardation.[]

  • Laron Syndrome

    This proves that intelligence is widely variable in GHIS cases ranging from severe mental retardation as in IGF-1 mutation to normal as in our cases.[] CONCLUSIONS: The mean HC deficit of the adult untreated LS males was -2.9 0.6 SD compared to a Ht deficit of -7.0 1.7 SDS.[] […] features (beaked nose, dysplastic ears and narrow face) with underdeveloped chin, dwarfism, severe mental retardation, and other malformation.[]

  • Mental Retardation

    mental retardation, infantile hypotonia, progressive neurologic impairment, recurrent infections, bladder dysfunction, and absent speech.[] […] accidents that cause severe head injuries, an interruption in the supply of oxygen to the brain (for example, near-drowning), or diseases such as encephalitis, meningitis, and untreated[] Inborn errors of metabolism can cause brain damage and mental retardation if left untreated. Phenylketonuria is an inborn error of metabolism.[]

  • Patau Syndrome

    Survivors suffer from severe mental retardation and health problems all their lives.[] […] additional disorders are either rare, incompatible with survival, or surgically correctable: Disorder: Rate at birth: Prognosis: Down syndrome (Trisomy 21) 1 in 700-900 Untreatable[] mental retardation may complicate survival Please rate topic.[]

  • Hypothyroidism

    Key points Neonatal screening for primary congenital hypothyroidism is an efficient tool for the secondary prevention of severe mental retardation Diagnosis of primary congenital[] ‘Mental retardation may result if hypothyroidism goes untreated in the first few years of life.’[] Early diagnosis and treatment of congenital hypothyroidism prevents severe mental retardation and other neurologic complications. [39] Even with early treatment, some children[]

  • Scoliosis

    Abstract Fragile-X syndrome is one of the most common inherited forms of mental retardation.[] Objective To present the outcomes related to health and function in untreated patients with LIS.[] retardation.[]

  • Congenital Hypothyroidism

    Newborn screening has dramatically reduced rates of untreated congenital hypothyroidism (CH).[] Clinical symptoms include severe mental retardation, impaired skeletal development, short stature, and myxedema. A deficiency of thyroid hormone present at birth.[] The most serious effect of untreated congenital hypothyroidism is severe mental retardation. Bone maturation and linear growth are also impaired.[]

  • Familial Adenomatous Polyposis

    retardation, several mild dysmorphic signs and lower limb venous thrombosis.[] The mean age for the development of colon cancer in the untreated individual is 39 years. Males and females are equally affected.[] The mean age of colorectal cancer in untreated familial adenomatous polyposis (FAP) is 39 years.[]

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