Edward's syndrome karyotype, 47,XY,+18

Trisomy 18 syndrome (formerly Edward's syndrome) karyotype, 47,XY,+18 This human male has a normal chromosome complement, plus an extra chromosome 18. Symptoms include growth failure, mental retardation, hypertonicity, rocker-bottom flatfoot, flexion defomities of the fingers, and renal and cardiac anomalies. Sufferers seldom survive beyond six months. The syndrome is associated with advanced maternal age.