Karavolia E, van Rijn-Dekker MI, Van den Bosch L, van den Hoek JGM, Oldehinkel E, Meijer TWH, Halmos GB, Witjes MJH, Oosting SF, van der Hoorn A, Langendijk JA, Steenbakkers RJHM. Impact of sarcopenia on acute radiation-induced toxicity in head and neck cancer patients.
Radiother Oncol 2022;
170:122-128. [PMID:
35304862 DOI:
10.1016/j.radonc.2022.03.009]
[Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 03/08/2022] [Accepted: 03/10/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND AND PURPOSE
Sarcopenia is related to late radiation-induced toxicities and worse survival in head and neck cancer (HNC) patients. This study tested the hypothesis that sarcopenia improves the performance of current normal tissue complication probability (NTCP) models of radiation-induced acute toxicity in HNC patients.
MATERIAL/METHODS
This was a retrospective analysis in a prospective cohort of HNC patients treated from January 2007 to December 2018 with (chemo)radiotherapy. Planning CT-scans were used for evaluating skeletal muscle mass. Characteristics of sarcopenic and non-sarcopenic patients were compared. The impact of sarcopenia was analysed by adding sarcopenia to the linear predictors of current NTCP models predicting physician- and patient-rated acute toxicities.
RESULTS
The cut-off values of sarcopenia in the study population (n=977) were established at skeletal muscle index <42.0 cm2/m2 (men) and <31.2 cm2/m2 (women), corresponding to the lowest sex-specific quartile. Compared to non-sarcopenic patients, sarcopenic patients were more frequently smokers (61% vs. 48%, p<0.001), had more often advanced stage of disease (stage III-IV, p=0.004), higher age (67 vs. 63 years, p<0.001) and experienced more pretreatment complaints, such as dysphagia (grade ≥2, p<0.001). Sarcopenia remained statistically significant, next to the linear predictor, only for physician-rated grade ≥3 dysphagia (week 3-6 during RT, p<0.01). However, sarcopenia did not improve the performance of these NTCP models (p>0.99).
CONCLUSION
Sarcopenia in HNC patients was an independent prognostic factor for radiation-induced physician-rated acute grade ≥3 dysphagia, which might be explained by its impact on swallowing muscles. However, addition of sarcopenia did not improve the NTCP model performance.
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