a congenital disorder marked by low birth weight with many different facial anomalies, a substantial occiput, overlapping of the index finger overtop the third finger, and visual irregularities. Serious cognitive retardation joins the defect, which is caused by non-disjunction of one of the chromosomes within the 17-18 group.

TRISOMY 17-18: "Trisomy 17-18 is commonly referred to as Edwards syndrome."
Cite this page: N., Pam M.S., "TRISOMY 17-18," in, April 29, 2013, (accessed May 30, 2020).