COMPARATIVE STUDY
JOURNAL ARTICLE
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Impact of Flap Reconstruction on Radiotoxicity After Salvage Surgery and Reirradiation for Recurrent Head and Neck Cancer.

BACKGROUND: Recurrent head and neck malignancies remain a therapeutic challenge. Tissue transfer, in addition to defect coverage and prevention of wound complications, may potentially decrease radiotoxicity. We evaluated radiation toxicity and survival outcomes of patients who underwent salvage surgery with reirradiation, comparing primary closure to flap reconstruction.

METHODS: Retrospective outcomes analysis of recurrent head and neck squamous cell carcinoma (HNSCC) patients treated with curative intent by salvage surgery (± flap reconstruction) and reirradiation from 1996 to 2011. Recurrent stage, reirradiation modality, chemotherapy use, and toxicities were evaluated.

RESULTS: Of 96 patients, 59 had primary closure, whereas 37 underwent flap reconstruction (26 free, 11 pedicled). Median radiation and reirradiation doses were 66 Gy and 60 Gy, respectively. Comparing nonflap and flap patients, there was no significant difference in acute mild toxicities (100 vs. 100 %, p = 1.0) or acute severe toxicities (33.9 vs. 37.8 %, p = 0.83). Nonflap patients experienced significantly greater incidence of both late mild toxicities (81.4 vs. 54.1 %, p = 0.006) and late severe toxicities (47.5 vs. 21.6 %, p = 0.02). Overall survival at 5 years was equivalent (33.1 vs. 34.7 %, p = 0.88). Free flap patients had greater delays to postoperative reirradiation and treatment package times compared with pedicled flap patients but no meaningful difference in survival outcomes.

CONCLUSIONS: Vascularized tissue potentially helps offset late toxicities associated with a second radiation course in recurrent head and neck cancer patients. In these selected patients, flap coverage may confer functional benefits and improve the long-term radiotoxicity profile.

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