Congenital upper auricular detachment.

A rare case of unilateral congenital ear deformity has been presented. The deformity is characterized by detachment and posterior rotation of the right upper auricle in an otherwise grossly normal auricle. We believe that this deformity may be related to defective mesenchymal fusion or accretion between the auricular hillocks of the hyoid and mandibular arches. Satisfactory correction was achieved by auricular repositioning with two triangular flaps.