Nasal bridge explained

The nasal bridge is the upper, bony part of the nose, which overlies the nasal bones.

Association with epicanthic folds

Low-rooted nasal bridges are closely associated with epicanthic folds. A lower nasal bridge is more likely to cause an epicanthic fold, and vice versa.^[1]

Dysmorphology

A lower or higher than average nasal bridge can be a sign of various genetic disorders, such as fetal alcohol syndrome. A flat nasal bridge can be a sign of Down syndrome (Trisomy 21), fragile X syndrome, 48,XXXY variant Klinefelter syndrome,^[2] or Bartarlla-Scott syndrome.

An appearance of a widened nasal bridge can be seen with dystopia canthorum, which is a lateral displacement of the inner canthi of the eyes.^[3] Dystopia canthorum is associated with Waardenburg syndrome.^[4]

Notes and References

1. Montagu, A. (1989) Growing Young N.Y.: McGraw Hill pp. 40
2. https://emedicine.medscape.com/article/945649-clinical#b4 Klinefelter Syndrome Clinical Presentation
3. http://www.utmb.edu/otoref/grnds/genetic-hl-2004-0317/genetic-hl-2004-0317.doc Genetic Hearing Loss
4. Tagra S, Talwar AK, Walia RL, Sidhu P . Waardenburg syndrome . Indian J Dermatol Venereol Leprol . 72 . 4 . 326 . 2006 . 16880590 . 10.4103/0378-6323.26718. free .