Abstract
Pleomorphic adenoma is the most frequent salivary gland tumor. Pleomorphic adenoma occurring from the allopatry salivary gland is particularly rare. We experienced a 28-year-old woman with pleomorphic adenoma thought to have occurred from the allopatry salivary gland on the ipsilateral side chin lower than the left parotoid pleomorphic adenoma for which one had undergone surgery eight years previously. Imaging (CT, MR etc) demonstrated an oval-shaped tumor located in the left lower chin without evidence of connection with the left submandibular gland and left parotid gland. Surgically, the tumor was completely removed and pathologically diagnosed as pleomorphic adenoma. Finally, we concluded that it was pleomorphic adenoma arising from the allopatry salivary gland. However, it could not be completely excluded that it was metastasis from the parotoid pleomorphic adenoma on the ipsilateral side from eight years previously.
