Congenital parotid ectopia in accessory maxilla and facial cleft anomalies: three cases report.

To further document the clinical features of accessory maxilla with three additional cases report. Clinical and radiological features of three cases of accessory maxilla were presented. Related literature was summarized for comparison. Ectopic parotid gland, facial cleft and accessory maxilla are three concomitant malformations in this condition. The tooth-bearing accessory maxillary duplication derives from the abnormal growth of the zygoma or zygomatic arch. Facial cleft, parotid ectopia and tooth-bearing accessory maxilla may constitute a rare congenital syndrome.