Purpose: To review our experience in the treatment of the neck in patients with carcinoma of the parotid gland.
Methods: A total of 263 patients were stratified into 3 groups: no neck dissection (NoND), elective neck dissection (END), and therapeutic neck dissection (TND). Clinicopathological characteristics of END and TND versus NoND were compared by Chi square test. Pathological positivity of each neck level was quantified. Neck recurrence-free survival was determined by Kaplan-Meier statistics.
Results: There were 232 cN0 and 31 cN+ patients. Of the cN0 patients, 74 had END. All cN+ patients had TND. Of the END group, occult neck metastases were detected in 26 (35 %) patients. The percentage of positivity was 6.7, 28.3, 21.3, 10.8, and 6.7 % for levels I to V, respectively. Compared to the NoND group, the END group was more likely to be over 60 years old, to have cT3T4 disease, and to have disease with more aggressive histology. Of the TND group, pathological positivity was found in 87 %. The percentage of positivity was 51.6, 77, 73, 53, and 40 % for levels I to V, respectively. Patients who had disease-positive necks had a poorer neck recurrence-free survival of 84.8 %.
Conclusions: In patients with cN0 disease, observation of the neck is safe in those who are under 60 years of age with clinical T1 or T2 tumors and who have low-grade histology. END should be carried out in patients with cT3T4 disease or high-grade histology and should involve levels II to IV at a minimum. Patients with cN+ disease commonly have all neck levels involved and therefore should be managed with comprehensive neck dissection.
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