 Symptoms vary, but usually result in dysmorphisms in the skull, nervous system problems, and developmental delay.Dysmorphisms in the heart, kidneys, and musculoskeletal system may also occur.An infant with complete trisomy 9 surviving 20 days after birth showed clinical features including a small face, wide fontanelle, prominent occiput, micrognathia, low set ears, upslanting palpebral fissures, high-arched palate, short sternum, overlapping fingers, limited hip abduction, rocker bottom feet, heart murmurs and a webbed neck.