Background and aims: Patients with oropharyngeal squamous cell carcinoma (OPSCC) are highly prone to malnutrition and sarcopenia due to the tumor's location and treatment-related toxicity. Human papillomavirus (HPV)-related and HPV-unrelated OPSCC represent two distinct biological entities. This study aimed to assess nutritional characteristics and body composition differences at diagnosis, as well as 3- and 6-months post- (chemo) radiation treatment, stratified by HPV status in OPSCC patients.
Methods: Retrospective data analysis of a prospective cohort of OPSCC patients diagnosed and treated with curative intent from 2016 to 2022 at our center. Sociodemographic, clinical, and nutritional data were retrieved from medical records from diagnosis to 6 months post-treatment. Body composition parameters were assessed by analyzing the cross-sectional area of the third lumbar vertebra (L3) using available positron emission tomography (PET) and computed tomography (CT) scans at baseline, 3- and 6-months post-treatment.
Results: Seventy patients were included, 33 (47.1 %) of whom had HPV-related OPSCC. HPV-related patients had higher body mass index (27.3 vs 21.9 kg/m2; p < 0.001) and better baseline nutritional status (p = 0.023), but no differences in skeletal muscle index (SMI, p = 0.103) compared to HPV-unrelated patients. At 3- and 6-months post-treatment the two groups showed similar SMI and total adipose tissue index loss (p > 0.05 for both). HPV status was not independently associated with body composition changes over time (p = 0.624).
Conclusions: Although HPV-related patients were better nourished than HPV-unrelated patients at diagnosis, by the end of treatment, both groups exhibited similar nutritional deterioration.
Keywords: Body composition; Human papillomavirus; Malnutrition; Nutritional status; Oropharyngeal squamous cell carcinoma; Treatment-related toxicity.
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