“…The examined polymorphic markers on chromosome 14 showed a normal biparental inheritance, giving no evidence of UPD 14 in this fetus. Trisomy 14 mosaicism is a rare cytogenetic finding with about 20 patients reported with aneuploid metaphases ranging from 1 to 98% in different tissues (Rethore et al, 1975;Martin et al, 1977;Johnson et al, 1979;Parker et al, 1980;Turleau et al, 1980;Jenkins et al, 1981;Dallapiccola et al, 1984;Fujimoto et al, 1985;Kaplan et al, 1986;Lipson, 1987;Cheung et al, 1988;Wegner et al, 1988;Vachvanichsanong et al, 1991;Ohashi et al, 1992;Lambert et al, 1994;Sepulveda et al, 1998). The clinical features of these patients are quite different, with more severe phenotypes associated with higher percentages of trisomic cells.…”