PURPOSE: Squamous cell carcinoma (SCC) of the buccal mucosa accounts for 23% to 37% of all intraoral cancer cases in Taiwan. Because of the high recurrence rate and invasive tumor behavior, the prognosis is generally poor. The aim of this study was to evaluate the prognostic significance of clinicopathologic factors on survival rates for patients with buccal SCC in a medical center in central Taiwan. MATERIALS AND METHODS: Between March 1995 and December 2002, patients admitted to hospital and diagnosed as having buccal SCC were enrolled in the study. There were 415 patients (406 men and 9 women) 25 to 84 years old (mean age, 51.1 ± 11.4 years). The chart records were retrospectively reviewed. Relevant clinical features in each patient, such as primary tumor size, tumor stage, initial treatment modalities, surgical margin status, cervical nodal metastasis status, and histopathologic grade, were compared for survival analysis. RESULTS: Three hundred ninety-four patients received surgical intervention. Univariate analysis of relevant prognostic factors showed that positive surgical margin, positive cervical nodal metastasis, positive extracapsular spread, larger tumor, and advanced tumor stage were associated with poor prognosis. Multivariate analysis identified the factors that independently influenced the survival rate as advanced stage disease (stage III: relative risk [RR], 3.09; P = .006; stage IV: RR, 4.64; P < .001), positive surgical margin (RR, 2.02; P = .001), and extracapsular spread of cervical lymph node metastasis (RR, 6.89; P < .001). CONCLUSIONS: This study represents the largest series in the literature and highlights the importance of tumor stage, surgical margin status, and extracapsular spread of cervical nodal metastasis as the most important prognostic factors in patients with buccal SCC. Copyright Â
PURPOSE:Squamous cell carcinoma (SCC) of the buccal mucosa accounts for 23% to 37% of all intraoral cancer cases in Taiwan. Because of the high recurrence rate and invasive tumor behavior, the prognosis is generally poor. The aim of this study was to evaluate the prognostic significance of clinicopathologic factors on survival rates for patients with buccal SCC in a medical center in central Taiwan. MATERIALS AND METHODS: Between March 1995 and December 2002, patients admitted to hospital and diagnosed as having buccal SCC were enrolled in the study. There were 415 patients (406 men and 9 women) 25 to 84 years old (mean age, 51.1 ± 11.4 years). The chart records were retrospectively reviewed. Relevant clinical features in each patient, such as primary tumor size, tumor stage, initial treatment modalities, surgical margin status, cervical nodal metastasis status, and histopathologic grade, were compared for survival analysis. RESULTS: Three hundred ninety-four patients received surgical intervention. Univariate analysis of relevant prognostic factors showed that positive surgical margin, positive cervical nodal metastasis, positive extracapsular spread, larger tumor, and advanced tumor stage were associated with poor prognosis. Multivariate analysis identified the factors that independently influenced the survival rate as advanced stage disease (stage III: relative risk [RR], 3.09; P = .006; stage IV: RR, 4.64; P < .001), positive surgical margin (RR, 2.02; P = .001), and extracapsular spread of cervical lymph node metastasis (RR, 6.89; P < .001). CONCLUSIONS: This study represents the largest series in the literature and highlights the importance of tumor stage, surgical margin status, and extracapsular spread of cervical nodal metastasis as the most important prognostic factors in patients with buccal SCC. Copyright Â
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