[Trisomy 18 (Edwards syndrome): two case reports].

Edwards (or trisomy 18) syndrome, with a frequency of about 1 over 8000 births, is commonly characterized by a very short survival; those rare cases reported with ages of 12 months or more, always were demonstrated to be chromosomic mosaicisms. Two affected children with completely different outcomes are here described; the first with a classic short-life evolution, in opposition to the second with long survival, the last a good example of all those various biological, psychological and social support interventions in these circumstances, very rare to match with, for this appears to be a trisomy 18 without mosaicism.