Study: NCT03865277

Intervention type: RADIATION
Group type: EXPERIMENTAL
Intervention: dose-escalated radiochemotherapy
Description: Patients will receive simultaneous radiochemotherapy, however the simultaneous chemotherapy is standard and not part of the evaluation in this trial. Present standard chemotherapy is cisplatinum 40 mg/m²/week (chemotherapy over the whole course of radiotherapy).~Radiotherapy is applied to doses of 54 Gy(RBE)/ 1.8 Gy(RBE) per fraction to the adjuvant region, 70 Gy(RBE)/ 2 Gy(RBE) per fraction to the tumor and involved lymphonodes and, if hypoxic and randomized to the intervention arm, 77 Gy(RBE)/ 2.2 Gy(RBE) per fraction to the primary tumor and lymphonode metastases \> 2 cm.~Radiotherapy is always applied with 5 fractions per week.

Intervention type: RADIATION
Group type: EXPERIMENTAL
Intervention: dose-escalated radiochemotherapy with carbon ion boost
Description: Patients will receive simultaneous radiochemotherapy, however the simultaneous chemotherapy is standard and not part of the evaluation in this trial.~Radiotherapy is applied to doses of 54 Gy(RBE)/ 1.8 Gy(RBE) per fraction to the adjuvant region, 70 Gy(RBE)/ 2 Gy(RBE) per fraction to the tumor and involved lymphonodes and, if hypoxic and treated in the study site Heidelberg, 77 Gy(RBE)/ 2.2 Gy(RBE) per fraction to the primary tumor and lymphonode metastases \> 2 cm using a carbon ion boost.~Radiotherapy is always applied with 5 fractions per week.

Intervention type: RADIATION
Group type: OTHER
Intervention: standard radiochemotherapy
Description: Patients will receive simultaneous radiochemotherapy, however the simultaneous chemotherapy is standard and not part of the evaluation in this trial. Present standard chemotherapy is cisplatinum 40 mg/m²/week (chemotherapy over the whole course of radiotherapy).~Radiotherapy is applied to doses of 54 Gy(RBE)/ 1.8 Gy(RBE) per fraction to the adjuvant region and 70 Gy(RBE)/ 2 Gy(RBE) per fraction to the tumor and involved lymphonodes.~Radiotherapy is always applied with 5 fractions per week.

Intervention type: RADIATION
Group type: OTHER
Intervention: standard radiochemotherapy
Description: Patients will receive simultaneous radiochemotherapy, however the simultaneous chemotherapy is standard and not part of the evaluation in this trial. Present standard chemotherapy is cisplatinum 40 mg/m²/week (chemotherapy over the whole course of radiotherapy).~Radiotherapy is applied to doses of 54 Gy(RBE)/ 1.8 Gy(RBE) per fraction to the adjuvant region and 70 Gy(RBE)/ 2 Gy(RBE) per fraction to the tumor and involved lymphonodes.~Radiotherapy is always applied with 5 fractions per week.

Intervention type: RADIATION
Group type: OTHER
Intervention: standard radiochemotherapy
Description: Patients will receive simultaneous radiochemotherapy, however the simultaneous chemotherapy is standard and not part of the evaluation in this trial. Present standard chemotherapy is cisplatinum 40 mg/m²/week (chemotherapy over the whole course of radiotherapy).~Radiotherapy is applied to doses of 54 Gy(RBE)/ 1.8 Gy(RBE) per fraction to the adjuvant region and 70 Gy(RBE)/ 2 Gy(RBE) per fraction to the tumor and involved lymphonodes.~Radiotherapy is always applied with 5 fractions per week.