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Association between treatment delays and oncologic outcome in patients treated with surgery and radiotherapy for head and neck cancer.
Head & Neck 2019 Februrary
BACKGROUND: This study sought to determine the oncologic impact of delays to surgery, radiotherapy, and completion of therapy in patients with head and neck squamous cell carcinoma.
METHODS: The impact of biopsy to surgery (BTS) time, surgery to start of radiation time (STSR), and radiation treatment time (RTT) on locoregional recurrence (LRR), distant metastases (DMs), and cancer-specific mortality (CSM) was examined. The cumulative incidences (CI) of LRR, DMs, and CSM were examined using Fine-Gray testing.
RESULTS: A total of 277 patients treated with surgery and adjuvant radiotherapy were analyzed. On multivariable testing, BTS >50 days was associated with DM (P = .03), whereas RTT and STSR were not. RTT >43 days was associated with LRR (P = .02) in patients with non-p16-positive-oropharynx cancer.
CONCLUSIONS: An increase in DM appears to be the mechanism by which prolonged time to treatment initiation leads to worse overall survival. Prolonged RTT has the greatest impact on patients with non-p16 positive oropharynx cancers.
METHODS: The impact of biopsy to surgery (BTS) time, surgery to start of radiation time (STSR), and radiation treatment time (RTT) on locoregional recurrence (LRR), distant metastases (DMs), and cancer-specific mortality (CSM) was examined. The cumulative incidences (CI) of LRR, DMs, and CSM were examined using Fine-Gray testing.
RESULTS: A total of 277 patients treated with surgery and adjuvant radiotherapy were analyzed. On multivariable testing, BTS >50 days was associated with DM (P = .03), whereas RTT and STSR were not. RTT >43 days was associated with LRR (P = .02) in patients with non-p16-positive-oropharynx cancer.
CONCLUSIONS: An increase in DM appears to be the mechanism by which prolonged time to treatment initiation leads to worse overall survival. Prolonged RTT has the greatest impact on patients with non-p16 positive oropharynx cancers.
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