S状皮膚切開法で摘出した副耳下腺多形腺腫例

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The accessory parotid gland tissue has been described as salivary tissue adjacent to Stensen's duct that is distinctly separate from the main body of the parotid gland. It is said that approximately 21% of human parotid glands have an accessory component. We report herein on a case of an accessory parotid gland tumor in the left mid-cheek. A 35-year-old woman presented with over 20-year history of a slowly growing and painless tumor in the left mid-cheek. The diagnosis of a pleomorphic adenoma arising from the accessory parotid gland was suggested based on the examination of MRI findings and fine needle aspiration cytology. The following surgical approaches for removing mid-cheek masses have been reported: a direct incision over the mass; the intraoral approach; and the standard parotidectomy approach. We chose s-shaped incision approach which allows safe preservation of the facial nerve, although it requires a large skin incision. This approach has advantages of providing a wide operation field to preserve the facial nerve and avoiding enucleation of the pleomorphic adenoma. After removal of the tumor, despite the appearance of slight transient facial nerve weakness in the buccal region, there were no other postoperative complications.