RT Journal Article SR Electronic T1 A live infant with trisomy 14 mosaicism and nuclear abnormalities of the neutrophils. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 467 OP 470 DO 10.1136/jmg.21.6.467 VO 21 IS 6 A1 Dallapiccola, B A1 Ferranti, G A1 Giannotti, A A1 Novelli, G A1 Pasquini, L A1 Porfirio, B YR 1984 UL http://jmg.bmj.com/content/21/6/467.abstract AB Mosaic trisomy 14 is described in a patient with severe developmental retardation and congenital malformations. Together with a few previous reports, this case suggests the existence of a syndrome associated with this chromosome imbalance. Hitherto unrecognised manifestations of trisomy 14 mosaicism were, in our patient, abnormalities of the neutrophil nuclei, which consisted of multiple pedunculated or sessile projections, similar to those characteristically associated with trisomy 13 syndrome.