Original contributionParotid tumors: a 10-year experience
Introduction
Salivary gland neoplasms account for 3% of all head and neck tumors. About 70% to 80% of all salivary gland tumors are located in the parotid gland [1], [2]. About 80% of parotid masses are benign neoplasms [3]. Parotidectomy is a common surgical procedure for parotid tumor. This study was to respectively review patients treated for parotid tumor in a 10-year period in a tertiary medical center located at mid-Taiwan. The objective was to analyze the clinical presentation, histopathology, complications of parotid tumors, and management of malignant parotid tumors.
Section snippets
Materials and methods
The medical records of 271 patients who underwent parotidectomy at the China Medical University Hospital from August 1996 to July 2006 were reviewed. All operations were either performed or supervised by the same surgeon (Dr Tsai). Superficial parotidectomy was performed if a benign tumor was located in the superficial lobe, and total parotidectomy was performed if it was in the deep lobe. Neither tumor enucleation nor conservative parotidectomy was performed. Management of malignant tumors
Results
A total of 271 patients underwent partoidectomy from August 1996 to July 2006. Of these patients, 229 (85%) had benign tumors, 33 (12%) had malignant tumors, and 9 had chronic inflammatory disease (3%) (Table 1). Most patients with benign tumors had pleomorphic adenoma (51%), followed by Warthin's tumor (23%). Among patients with benign tumors, 3 of them had 2 kinds of tumor synchronously. There were 2 of them that had coexisting pleomorphic adenoma and Warthin's tumor, and 1 that had
Comparison of the histolopathologic finding
The prevalence of Warthin's tumor in this study was higher (23%) than that reported in other series (5%–20%) [3], [4], [5]. However, the most common benign parotid tumor was pleomorphic adenoma (51%) in our study, a finding consistent with previous studies [3], [4], [5]. Lim et al [6] was the first to report that the most common benign parotid tumor is Warthin's tumor (40%) and not pleomorphic adenoma (36%) in Singapore; however, the sample size in their study was small (118 cases). The high
Conclusion
A comprehensive understanding of the anatomy of facial nerve and surgical procedures contributes to the safety and low morbidity of parotid surgery. Advanced tumor stage is a predictor of poor outcome. More research is needed in target therapy or chemotherapy for the patients with malignant parotid tumor.
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