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1 Possible Causes for Mental Retardation from Rapid Mental Regression

  • Alpha-Mannosidosis

    Alpha-mannosidosis is a lysosomal storage disorder, first described by Swedish physician Okerman in 1967. In humans it is known to be caused by an autosomal recessive genetic mutation in the gene MAN2B1, located on chromosome 19, affecting the production of the enzyme alpha-D-mannosidase, resulting in its deficiency.[…][en.wikipedia.org]

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