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  • Title: Oncologic efficacy of angiolytic KTP laser treatment of early glottic cancer.
    Author: Zeitels SM, Burns JA.
    Journal: Ann Otol Rhinol Laryngol; 2014 Dec; 123(12):840-6. PubMed ID: 24970297.
    Abstract:
    OBJECTIVE: Angiolytic laser removal of early glottic cancer with ultra-narrow margins was reported in a pilot study 5 years ago as an innovative surgical treatment strategy to better preserve vocal function. Subsequently, in a cohort of > 90 patients, enhanced voice outcomes were achieved and there was diminished need for post-treatment phonosurgical reconstruction. However, the initial pilot study examining oncologic efficacy had a limited number of patients and most did not have 3-year follow-up. Consequently, further analysis of the oncologic efficacy is valuable. METHOD: Retrospective review. RESULTS: One hundred seventeen patients (T1a-71, T1b-11, T2a-10, T2b-25) underwent potassium-titanyl-phosphate (KTP) laser treatment of early glottic cancer with a minimum 3-year follow-up (average = 53 months). The "b" designation delineated bilateral disease. Disease control for T1 and T2 lesions was 96% (79/82) and 80% (28/35), respectively. All 10 recurrences were treated with radiotherapy. Fifty percent (5/10) were controlled with radiotherapy, and the other 5 died of disease. Larynx preservation and survival were achieved in 99% (81/82) with T1 disease and 89% (31/35) with T2 disease. CONCLUSION: This investigation provides further evidence that angiolytic KTP laser removal of early glottic cancer with ultra-narrow margins is an effective oncologic treatment strategy. Radiotherapy was preserved for future use in more than 90% of patients. Since a majority of patients are referred by an otolaryngologist to undergo treatment of early glottic cancer with radiotherapy, this investigation provides compelling information to reappraise this paradigm.
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