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Published online by Cambridge University Press: 01 August 2014
Three clinically atypical cases of Down S. and cerebral idiocy are described, showing peculiar chromosomal deviations and of difficult diagnosis. One more case is described, partly showing Marfan S. symptomatology with a duplication of the satellite-region of a G-Chromosome. This chromosomal deviation appears to occur in the family, although with no clinical significance.