ArticleClinical and translational radiation oncology2026
Intensity-modulated radiotherapy with carbon ion boost for high-risk sinonasal squamous cell carcinoma: clinical outcomes and the management of the node-negative neck.
Article in Clinical and translational radiation oncology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Local control of high-risk sinonasal squamous cell carcinoma (SCC) remains challenging and often involves significant morbidity. Management of the node-negative neck is still debated. This study evaluated treatment outcomes, neck management strategies, and toxicity rates in patients treated with intensity-modulated radiotherapy (IMRT) combined with a carbon ion boost. Methods: We evaluated 43 patients with sinonasal SCC treated with IMRT and carbon ion boost between 2011 and 2019. Follow-up followed head and neck cancer guidelines. Patient and tumor characteristics, treatment outcomes, and toxicity (per CTCAE v5.0) were assessed. Statistical analysis was performed using R version 4.1.0. Results: Median age was 64 years (range 19-83). Most patients had T3-4 tumors (n = 36; 83.7 %) and were clinically node-negative (n = 40; 93.0 %). The predominant regimen was 24 Gy (RBE) carbon ion boost in 8 fractions, followed by 50 Gy IMRT in 25 fractions. Postoperative RT was delivered to 25 patients (58.1 %), while 18 (41.9 %) received definitive RT. Elective or therapeutic neck dissection was performed in 10 patients (23.3 %), none showing lymph node metastases. In total, 22 distinct cervical lymph node treatment strategies were applied. Median follow-up for overall survival (OS) was 25.1 months. Tumor recurrence occurred in 11 patients (25.6 %), primarily due to local failure (n = 7; 63.6 %). OS and local progression-free survival (L-PFS) at 12/24 months were 93.0 %/89.3 % and 88.4 %/79.0 %, respectively. Grade III acute and late toxicity occurred in 9.3 % and 4.7 % of patients, respectively. No grade IV toxicity was reported. Mean numbers of grade I-II toxicities per patient were 4.8 (acute) and 2.4 (late). Conclusion: IMRT with carbon ion boost provides promising OS and local control in high-risk sinonasal SCC. The management of the node-negative-neck was highly individualized. Toxicity was acceptable and may be further reduced by tailoring cervical lymph node treatment in selected patients.
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