Tuncbilek E, Bobrow M, Clarke G, Taysi K
J Med Genet. 1976 Oct;13(5):411-2. doi: 10.1136/jmg.13.5.411.
An extreme variation of the short arm of no. 21 chromosome in the mother of a 21/21 translocation mongol is described. The possible relation between the very long short arm of chromosome no. 21 in the mother and a centric fusion type of translocation mongolism in the offspring is discussed.