Which of the following feature on second trimester ultrasound is not a marker of Down's syndrome:

USG findings in downs syndrome are Intrauterine growth restriction Mild cerebral ventriculomegaly Choroid plexus cysts Increased nuchal fold thickness Cystic hygromas Diaphragmatic hernia Echogenic intracardiac foci Congenital hea defects Increased intestinal echogenicity Duodenal atresia ("double-bubble sign") Renal pelvis dilation Shoened humerus and femur Increased iliac wing angle Incurving (clinodactyly) and hypoplasia of the fifth finger Increased space between first and second toes: sandal gap Two-vessel umbilical cord(single Umblical aery)