Speech and swallowing outcome measures for oral cancer - what should we be collecting?

Modest improvements in survival following oral cavity cancer have increased the population of long-term survivors, shifting attention toward speech and swallowing outcomes. However, functional outcome measurement remains heterogeneous and inconsistently reported, limiting comparability across studies and translation to clinical decision-making. This review evaluates current speech and swallowing outcome measures used in oral cavity cancer, with particular attention to glossectomy populations, and proposes a pragmatic framework for standardized, multidimensional assessment.

Recent literature highlights the importance of integrating tongue-specific metrics (e.g., lingual strength, range of motion) with function-focused measures (e.g., diet level, speech intelligibility) and patient-reported outcomes. Tools such as instrumental swallow assessments, performance-based masticatory testing, and validated patient-reported instruments capture complementary dimensions of recovery. Emerging technologies, including speech-tracking approaches, offer greater sensitivity to subtle changes in function. Nonetheless, no unified core outcome set exists for oral cavity cancer, and oral phase-specific metrics remain underdeveloped, particularly in patients undergoing tongue resection and reconstruction.

No single instrument adequately captures the multidimensional functional consequences of oral cavity cancer treatment. We propose a domain-anchored measurement framework integrating physiologic, performance-based, and patient-reported outcomes to improve precision, harmonization, and clinical relevance in survivorship research and rehabilitation.