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  • Title: Prognostic value of the proliferation marker Ki-67 in laryngeal carcinoma: results of the accelerated radiotherapy with carbogen breathing and nicotinamide phase III randomized trial.
    Author: Rademakers SE, Hoogsteen IJ, Rijken PF, Terhaard CH, Doornaert PA, Langendijk JA, van den Ende P, van der Kogel AJ, Bussink J, Kaanders JH.
    Journal: Head Neck; 2015 Feb; 37(2):171-6. PubMed ID: 24347430.
    Abstract:
    BACKGROUND: The prognostic and predictive value of the proliferation marker Ki-67 was investigated in a randomized trial comparing accelerated radiotherapy with carbogen breathing and nicotinamide (ARCON) to accelerated radiotherapy in laryngeal carcinoma. METHODS: Labeling index of Ki-67 (Li Ki-67) in immunohistochemically stained biopsies and the colocalization with carbonic anhydrase IX (CAIX) were related to tumor control and patient survival. RESULTS: On average, node-positive patients had a higher Li Ki-67 (median 14% vs 8%; p < .01). In patients with a high Li Ki-67, the 5-year regional control and metastases-free survival were 79% versus 96% (p < .01) and 71% versus 88% (p = .05) for accelerated radiotherapy and ARCON, respectively. The 5-year local control and disease-specific survival were not significantly different. Patients with low Ki-67 expression had an excellent outcome with accelerated radiotherapy alone. CONCLUSION: Patients with laryngeal carcinomas with high proliferative activity are at increased risk of regional and distant metastases formation. This risk can be reduced by treatment with ARCON.
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