Parotid duct communicating with a labial pit and ectopic salivary cyst

Labial pits are usually described as blind epidermal invaginations of lip mucosa with occasional drainage of minor salivary gland secretions. A case of an aberrant parotid duct in communication with both a unilateral, commissural labial pit and an interposed salivary cyst is presented. A 7-year-old boy who had experienced lifelong clear drainage from a congenital pit at his right oral commissure developed fever, pain, and a submucosal mass of the right cheek over a 6-week period. A preoperative sialogram through the pit demonstrated a communication between the oral commissure fistula, an intervening salivary cyst, and a proximal tract from the cyst to the parotid gland. An en bloc resection of the pit, fistula tract, and cyst was performed through a transoral approach. The dissection was medial to the buccinator muscle. There has been no recurrence of the cyst after 1 year follow-up. A description of labial pits and parotid duct anomalies is presented; however, to our knowledge, this combination of anomalies has not been previously described.