Carbon Ion Re-Radiotherapy in Patients With Recurrent or Progressive Locally Advanced Head-and-Neck Cancer

Overview

After multimodal therapy of head-and-neck tumors, patients often develop local recurrence, locally progressive disease or second primary tumors. In this highly pre-treated patient cohort, therapeutic options are limited. Patients that are not candidates for salvage surgery may benefit from re-irradiation. Despite recent technical advances, re-irradiation is associated with severe side effects. Carbon ion Re-Radiotherapy (reCIRT) has shown encouraging results in retrospective analyses with moderate toxicity. In the current Phase-II CARE-trial, reCIRT and conventional photon re-irradiation in patients with recurrent or progressive locally advanced head-and-neck cancer will be assessed regarding toxicity/ safety, local progression-free survival, overall survival and quality-of-life.

The incidence of head-and-neck cancer worldwide amounts to around 550.000 cases per year, with male patients affected significantly more often. Common risk factors are smoking, alcohol, viral infections, immunodeficiency or genetic factors. Locally advanced head-and-neck tumors can lead to severe symptoms such as dysphagia, cachexia and tumor pain with a significant decrease of the quality-of-life. The prognosis depends on multiple factors such as TNM-staging, tumor volume, histology, general condition, age and smoking. Further risk factors are positive resection margins, extracapsular extension and perineural invasion. While metastatic spread significantly decreases overall survival, the life-limiting problem in patients with head-and-neck cancer is locally invasive and destructive tumor growth leading to a decrease of the performance status and quality of life. After multimodal therapy of locally advanced head-and-neck tumors, around 30 - 50% of patients will develop local recurrence or locally progressive disease and up to 8% of patients with HNSCC will develop a second primary tumor in the head-and-neck .