Vol.100 No.10 contentsPRACTICA OTO-RHINO-LARYNGOLOGICA
Vol. 100 No. 10 October 2007
A Case of Pleomorphic Adenoma Arising from Allopatry Salivary
Gland after Surgery for Pleomorphic Adenoma in Parotid Gland
Toshiro Kawano, Junichi Ishitoya and Ryo Endo
(Yokohama City University Medical Center)
Mamoru Tsukuda
(Yokohama City University Graduate School of Medicine)
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.
Key words : pleomorphic adenoma, allopatry salivary gland, metastasis