See Also: Down syndrome features(health)
Features(medicine)
morphological features(medicine)
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Physical Features, Protection Of(law)
Mood-incongruent psychotic features(health)
schizophrenia and disorders with psychotic features(medicine)
Mood-congruent psychotic features(health)
Divine Providence Health Center Avera Health(health)
Hegg Memorial Health Center Avera Health(health)

Down syndrome features (health)


Children with Down syndrome have multiple malformations and mental impairment due to the presence of extra material from chromosome 21. Among the more common physical features are hypotonia (floppiness), small head with brachycephaly, epicanthic folds across the inside corners of the eyes, upward outward slanting palpebral fissures (eye slits), Brushfield spots in the iris, small mouth, small ears, excessive skin at the nape of the neck, a single transverse palmar crease, and short fifth finger with clinodactyly (incurving). A wide space, often with a deep fissure between the first and second toes, is also common. There is an increased risk of congenital heart defects (50%); leukemia (<1%); hearing loss (75%); otitis media (ear infections) (50%-70%); Hirschsprung disease with absence of nerves from the bowel (<1%); gastrointestinal atresia (12%); eye disease (60%), including cataracts (15%) and severe refractive errors (50%); acquired hip dislocation (6%); obstructive sleep apnea (50%-75%); and thyroid disease (15%). There is no increased risk of solid tumors.