Feasibility of Use of the 8

introductionInclusion of depth of invasion (DOI) and a separate classification for human papillomavirus (HPV)-associated Oropharyngeal Cancers (OPCs) are two of the many major changes in the 8

methodsThe survey was done in the form of a questionnaire which was distributed personally and via the internet to 100 clinicians. Seventy-two clinicians responded to the questionnaire. The results were analyzed and frequency distribution was computed.

resultsEighty-three percent of the clinicians experienced that palpation of the tumour was not a reliable method to determine the DOI. The common issues stated by the clinicians were difficulty in assessing DOI in certain subsites of the oral cavity (most commonly retromolar trigone-83%), inability to determine DOI in patients with trismus, and inability to correlate pathological and clinical DOI. Thirteen percent of the clinicians did not rely on radiological tools for measuring the DOI. Seventy percent of the clinicians did not perform a P16 assay for patients with oropharyngeal cancers. Fifty percent of the clinicians preferred chemoradiotherapy for early HPV positive oropharyngeal cancers. DISCUSSION: Based on the results of the survey, the authors recommend a need for more interpretative guidelines and methods for determining the DOI. The authors also emphasize the need for determining HPV status for all oropharyngeal carcinomas.