Objectives: (1) Investigate overall survival (OS) and disease-free survival (DFS) for high-risk head and neck basal cell carcinoma (HNBCC) requiring large extirpation with free-flap reconstruction. (2) Determine impact of prognostic features-tumor size, subsite, number of high-risk features, perineural invasion, and bony invasion-on high-risk HNBCC survival. (3) Determine survival benefit of adjuvant radiation for high-risk HNBCC.
Study Design: Case series with chart review (2002-2013).
Setting: Academic tertiary care center.
Subjects And Methods: Consecutive head and neck patients (N = 431) required free-flap reconstruction following tumor extirpation, 38 for aggressive HNBCC. All cases were high risk. DFS and OS were examined using Kaplan-Meier analysis. Prognostic variables and adjuvant radiation were analyzed utilizing Student's t test for continuous variables and Fisher's exact testing for categorical dependent variables. Complications were reported.
Results: Mean tumor diameter was 5.17 cm (range, 1.2-15.0 cm). Mean follow-up was 19.9 months. Overall 2-year survival was 80%, falling to 66% at 5 years. Two-year disease-free survival was 72%. Six patients recurred (n = 5 local, 1 distant). Adjuvant radiotherapy improved DFS (P < .01) but not OS (P = .66). Tumors >2.5 cm did not affect OS (P = .61), regardless of subsite. Bone involvement (44.7% cases) did not affect DFS (P = .39) or OS (P = .18).
Conclusions: Larger HNBCC warranting free tissue transfer do not confer worse outcomes, independent of subsite. Adjuvant radiotherapy does not improve OS but significantly affected DFS, allowing for 13.7 additional months of DFS. Bone involvement does not influence DFS or OS and should not preclude surgery, even in advanced cases requiring free-flap reconstruction.
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