Surgical treatment of preauricular sinus:Standard Approach
A preauricular pit may mark the entrance to a sinus tract, which can vary in length, follow a tortuous course, and branch extensively. Preauricular sinuses and cysts have a component of close association with the auricular perichondrium. For this reason, some argue that complete removal of a sinus tract or cyst should also include a portion of the auricular perichondrium at the base of the lesion.
Preauricular sinuses or cysts are found lateral and superior to the facial nerve and parotid gland, whereas first branchial cleft malformations are found in close association with these structures, as well as with the external auditory canal.