auditory canals in a 9-year-old boy, 1920<unk>  is a congenital deformity where the pinna (external ear) is underdeveloped. A completely undeveloped pinna is referred to as anotia. Because<unk>  and anotia have the same origin, it can be referred to as<unk> -anotia.<unk>  can be unilateral (one side only) or bilateral (affecting both sides).<unk>  occurs in 1 out of about 8,000–10,000 births. In unilateral<unk> , the right ear is most commonly affected. It may occur as a complication of taking Accutane (isotretinoin) during pregnancy.
Microtia
Micromastia
Synechia 
Micropenis
Macrotia
Knuckle pads
Cartilage–hair hypoplasia
Desmoplasia