retroauricular

Diagram at Baylor College of Medicine (listed as "retroauricular")

The most common otoplastic complication is suture extrusion in the retroauricular sulcus, (the groove behind the ear).

The main symptoms of Frey syndrome are undesirable sweating and flushing occurring on the cheek, temple (temporal region), or behind the ears (retroauricular region) after eating certain foods, especially those that produce a strong salivary response.

Ear pinback - An otopexy that "flattens" protuberant ears against the head (ca. 15-18 mm), wherein the surgeon makes an incision to the natural crease behind (retroauricular sulcus) the external ear, and cuts a small tunnel along the front of the poorly folded antihelix.

The mastoid lymph nodes (retroauricular lymph nodes or posterior auricular glands) are a small group of lymph nodes, usually two in number, located just beneath the ear, on the mastoid insertion of the sternocleidomastoideus muscle, beneath the posterior auricular muscle.

The degree of anatomical deficiency is variable, and usually can be corrected with a cartilage graft and a V-Y advancement-flap of retroauricular skin, harvested from the back of the ear, because there often is excess skin in the upper-third of the ear being corrected.

The second subtype, posterolateral neck dissection, refers to the removal of the suboccipital lymph nodes, retroauricular lymph nodes, levels II-IV, and level V. This procedure is used most often to remove nodal disease from cutaneous melanoma of the posterior scalp and neck.