Outcomes
The overall recurrence rate (local and regional) was 22.9% and 10.8% for distant metastasis (Table 1) . In the PM group, 51.4% of the patients also showed neck metastasis. The rate of neck occult nodal disease was 13.5% (5/37). Mortality rate related to the disease was 32.4%; the morbidity rate (alive with neoplasia) was 27.0%; and only 40.5% of the patients were alive without disease, thus, the survival rate was 67.6%.
The Table 3 shows the univariate analysis, demonstrating differences in relation to extracapsular spread from neck, extracapsular spread from parotid, and compromised margins. In Table 4 , Logistic regression multivariate analysis showed that parotid metastasis extracapsular spread was significantly associated with evolution to positive neck metastasis (OR = 37.61) .
The survival curves showed no differences in comparisons based on the type of parotid surgery; histological differentiation degree; recurrence of primary CSCC in a different location; or pathological final stage (I/II x III/IV) in both groups.