Low-set ears
Low-set ears
Low-set ears (pronunciation: loʊ-sɛt iərz) are a clinical feature where the ears are positioned lower on the head than is typical. This condition is often associated with various genetic disorders and syndromes.
Etymology
The term "low-set ears" is derived from the English words "low" meaning below the usual level, "set" meaning put, lay, or stand (something) in a specified place or position, and "ears" referring to the organ of hearing and balance in humans and other vertebrates.
Definition
Low-set ears are characterized by the positioning of the ears below the horizontal line drawn between the inner canthi of the eye and the occipital protuberance. This condition is often identified at birth and can be a sign of an underlying genetic condition.
Associated Conditions
Low-set ears are often associated with a number of genetic conditions and syndromes, including:
- Down Syndrome: A genetic disorder caused by the presence of all or part of a third copy of chromosome 21.
- Turner Syndrome: A chromosomal condition that alters development in females.
- Trisomy 18 (Edwards Syndrome): A condition which is caused by error in cell division, known as meiotic disjunction.
- Noonan Syndrome: A disorder that involves unusual facial characteristics, short stature, heart defects, and other physical problems.
Related Terms
- Microtia: A congenital deformity where the pinna (external ear) is underdeveloped.
- Otoplasty: A type of cosmetic ear surgery to change the shape, position, or size of the ears.
- Craniofacial: Pertaining to the skull and face.
- Genetic Disorder: A disease caused in whole or in part by a change in the DNA sequence away from the normal sequence.
External links
- Medical encyclopedia article on Low-set ears
- Wikipedia's article - Low-set ears
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