Opinion statement
Concurrent chemoradiotherapy (CRT) with high-dose (100 mg/m2), single-agent cisplatin is considered the standard of care for locoregionally advanced head and neck cancer (LAHNC). Poor compliance often due to significant treatment-related toxicities observed during CRT regimen has stimulated research efforts to examine for evidence of the optimal cumulative cisplatin dose and schedule. The findings from this systematic literature review demonstrate that there are insufficient prospective, randomized controlled data to determine the optimal total dose (and schedule) of cisplatin to administer concomitantly with radiotherapy in the treatment of LAHNC. Given the clinical challenges associated with administering concurrent CRT with single-agent high-dose cisplatin, as well as the long-term toxicities accompanying this treatment, an examination of the available literature for evidence of dose efficacy is of continued clinical interest. Moving forward, it is critical that researchers include complete descriptions of key disease and treatment variables (i.e. treatment compliance and HPV status) to inform and strengthen clinical decisions. The substantial heterogeneity of LAHNC has led to the focus of recent research efforts to risk-stratify using a combination of clinical and molecular markers (e.g. HPV status). Thus, the optimal total dose (and schedule) of cisplatin may need to be modified to reflect the specific characteristics of the individual patient subpopulations being treated. At present, CRT remains the standard of care for LAHNC, but this field is rapidly evolving. National and international clinical trials are ongoing to evaluate treatment de-intensification in favourable risk patient subsets and treatment intensification in poor-risk patient subsets, these will provide evidence-based guidance to individualize therapy with the ultimate goal of improving patient outcomes.
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