Microtia

For the orchid genus, see Microtis (plant), the gastropod genus, Microtis (gastropod), the vole genus, Microtus, the butterfly genus, and Microtia (butterfly).
Microtia
Unilateral grade III microtia (more often affecting the right ear).
SpecialtyMedical genetics Edit this on Wikidata

Microtia is a congenital deformity where the auricle (external ear) is underdeveloped. A completely undeveloped auricle is referred to as anotia. Because microtia and anotia have the same origin, it can be referred to as microtia-anotia.[1] Microtia can be unilateral (one side only) or bilateral (affecting both sides). Microtia occurs in 1 out of about 8,000–10,000 births. In unilateral microtia, the right ear is most commonly affected. It may occur as a complication of taking Accutane (isotretinoin) during pregnancy.[2]

  1. ^ Online Mendelian Inheritance in Man (OMIM): Microtia-Anotia - 600674
  2. ^ Pretest self assessment and review for the USMLE, pediatrics, 12th edition, question 84, general pediatrics