151751-Najiba-Chargi

362 CHAPTER 18 ABSTRACT Background Sarcopenia is known as a geriatric syndrome associated with increased disability and de- creased survival in elderly patients. In oncological patients, pretreatment low skeletal muscle mass (SMM), sometimes referred to as sarcopenia, is an emerging negative prognostic factor. Commonly, only SMM is assessed in cancer patients. Sarcopenia is defined as the combination of low SMM and low muscle function (MF). We investigated the relation between SMM, MF, sarcopenia (SMM and MF combined) and overall survival (OS) in a group of elderly patients with head and neck squamous cell carcinoma (HNSCC). Material and methods A retrospective study in elderly HNSCC patients treated between 2015 and 2018 was per - formed. The prognostic value of SMM and MF alone, and sarcopenia was investigated. Results Eighty-five patients were included of whom 48.2% had sarcopenia. The median OS was sig - nificantly worse for patients treated with curative intent with sarcopenia (12.07 months; IQR 3.64-21.82) compared to patients without sarcopenia (13.60 months; IQR 5.98-27.00) (HR 2.80; 95% CI 1.14-6.88; p=0.03). SMM and MF alone were not significant predictors of OS. Conclusion Sarcopenia is associated with impaired OS in elderly HNSCC patients. Sarcopenia, defined as the combination of low SMM and low MF, appears to be a better predictor of OS than low SMM or low MF separately.