Parotid Gland Tumor
摘要
Tumors of the salivary glands are uncommon, accounting for approximately 3% of head and neck tumors. Around 70–80% of salivary gland tumors occur in the parotid gland, most often in the superficial lobe, and 80% of parotid gland tumors are benign. Common benign parotid gland tumors include pleomorphic adenoma, Warthin’s tumor, basal cell adenoma, and oncocytoma, with pleomorphic adenoma being the most frequent and Warthin’s tumor the second most common. The most frequent malignant parotid gland tumor is mucoepidermoid carcinoma, followed by adenoid cystic carcinoma, acinic cell carcinoma, carcinoma ex. pleomorphic adenoma etc. A history, clinical exam, imaging tests, and fine needle aspiration cytology or core needle biopsy are nearly essential to diagnose a parotid gland tumor. Pain in the parotid mass, facial nerve weakness, rapid enlargement of the tumor, and numbness of the ear or facial skin—alone or with neck lymphadenopathy—likely indicate malignancy. Surgery is the only treatment for parotid gland tumors. However, the type of surgery (extracapsular dissection, partial superficial parotidectomy, superficial parotidectomy, total parotidectomy with or without neck dissection) depends on the tumor’s type and anatomical location.