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Dragan T, Duprez F, Van Gossum A, Gulyban A, Beauvois S, Digonnet A, Lalami Y, Van Gestel D. Prophylactic gastrostomy in locally advanced head and neck cancer: results of a national survey among radiation oncologists. BMC Cancer 2021; 21:656. [PMID: 34078309 PMCID: PMC8171041 DOI: 10.1186/s12885-021-08348-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 05/12/2021] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Nutritional complications in patients with locally advanced head and neck cancer (LA-HNC) treated by concurrent chemoradiotherapy (CCRT) often lead to placement of a prophylactic gastrostomy (PG) tube, while indication lacks harmonization. Our aim was to explore the current PG tube utilization among Belgian radiation oncology centers. METHODS A survey was distributed to all 24 Belgian Radiation oncology departments, with questions about the number of patient treated per year, whether the PG indication is discussed at the multidisciplinary board, placement technique, time of starting nutrition and removal, its impact on swallowing function and importance of clinical factors. For the latter Relative Importance and Discordance Indexes were calculated to describe the ranking and agreement. RESULTS All 24 centers submitted the questionnaire. Twenty three treat more than 20 head and neck (HNC) patients per year, while four (1 in 21-50; 3 in 51-100) are not discussing the gastrostomy tube indication at the multidisciplinary board. For the latter, endoscopic placement (68%) is the dominant technique, followed by the radiologic (16%) and laparoscopic (16%) methods. Seventy-five percent start the enteral nutrition when clinically indicated, 17% immediately and 8% from the start of radiotherapy. Majority of specialists (19/24) keep the gastrostomy tube until the patient assume an adequate oral feeding. Fifteen centres are considering PG decrease swallowing function. Regarding factors and their importance in the decision for the PG, foreseen irradiated volume reached highest importance, followed by 'anatomical site', 'patients' choice' and 'postoperative versus definitive' and 'local expertise', with decreasing importance respectively. Disagreement indexes showed moderate variation. CONCLUSIONS The use of a PG tube for LAHNC patients treated by CCRT shows disparity at national level. Prospective studies are needed to ensure proper indication of this supportive measure.
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Affiliation(s)
- Tatiana Dragan
- Department of Radiation Oncology (Head and Neck Unit), Institut Jules Bordet, Université Libre de Bruxelles, 1 rue Héger Bordet - 1000 Bruxelles, Brussels, Belgium.
| | - Fréderic Duprez
- Department of Radiotherapy-Oncology, Universitair Ziekenhuis Gent, Ghent, Belgium
| | - André Van Gossum
- Consultant at the Department of Gastroenterology and Clinical Nutrition, Hopital Erasme and Institut Jules Bordet, Brussels, Belgium
| | - Akos Gulyban
- Medical Physics Department, Institut Jules Bordet, Brussels, Belgium
| | - Sylvie Beauvois
- Department of Radiation Oncology (Head and Neck Unit), Institut Jules Bordet, Université Libre de Bruxelles, 1 rue Héger Bordet - 1000 Bruxelles, Brussels, Belgium
| | - Antoine Digonnet
- Department of Head and Neck Surgery, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Yassine Lalami
- Medical Oncology Clinic, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Dirk Van Gestel
- Department of Radiation Oncology (Head and Neck Unit), Institut Jules Bordet, Université Libre de Bruxelles, 1 rue Héger Bordet - 1000 Bruxelles, Brussels, Belgium
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Visini M, Giger R, Shelan M, Elicin O, Anschuetz L. Predicting Factors for Oncological and Functional Outcome in Hypopharyngeal Cancer. Laryngoscope 2020; 131:E1543-E1549. [PMID: 33098325 DOI: 10.1002/lary.29186] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/31/2020] [Accepted: 10/05/2020] [Indexed: 11/09/2022]
Abstract
OBJECTIVES/HYPOTHESIS Hypopharyngeal squamous cell carcinoma (SCC) is a rare but aggressive malignancy, with low survival rates and high incidence of tumor and treatment-related morbidity. This study aims to analyze the long-term oncologic and functional outcomes of a large cohort of patients and to determine prognostic factors. STUDY DESIGN Retrospective cohort study. METHODS The records of all patients diagnosed with hypopharyngeal SCC and treated with curative intent at our tertiary referral center were reviewed. Patient and initial disease characteristics, features, and complications of primary treatment, recurrence patterns, and corresponding treatments and the oncologic and functional long-term outcome were determined. RESULTS For a total of 179 patients, primary radiotherapy (RT) was the predominant treatment modality (78%), whereas 22% underwent primary surgery. The median, 2-year, and 5-year overall survival (OS) for the study cohort were 47 months, 64% and 43%. The median survival after first and second relapse was 7 and 6 months, respectively. The 2 and 5-year relapse-free survival (RFS) was 52% and 36%. The median RFS after first relapse and salvage treatment was 9 months. A nodal status of ≥cN2 (HR = 1.89, CI:1.21-3.05, P < .005) and any other primary tumor localization than pyriform sinus (HR = 1.60, CI: 1.04-2.42, P < .05) were identified as independent risk factors for shorter OS and RFS. Regarding functional outcome, the 2- and 5-year laryngectomy-free-survival was 55% and 37%, respectively. CONCLUSIONS In this large cohort with long-term follow-up, any other primary tumor localization than pyriform sinus and a nodal status of ≥cN2 were identified as risk factors for reduced OS and RFS. LEVEL OF EVIDENCE 4 Laryngoscope, 131:E1543-E1549, 2021.
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Affiliation(s)
- Miranda Visini
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Roland Giger
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Mohamed Shelan
- Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Olgun Elicin
- Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Lukas Anschuetz
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland
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Laryngo-esophageal dysfunction free survival and propensity score matched analysis comparing organ preservation and total laryngectomy in hypopharynx cancer. Oral Oncol 2019; 95:143-149. [DOI: 10.1016/j.oraloncology.2019.06.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 03/18/2019] [Accepted: 06/13/2019] [Indexed: 11/23/2022]
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Akbaba S, Held T, Lang K, Hoerner-Rieber J, Zaoui K, Forster T, Rieken S, Plinkert P, Debus J, Adeberg S. Salvage radiotherapy for recurrent hypopharyngeal and laryngeal squamous cell carcinoma (SCC) after first-line treatment with surgery alone: a 10-year single-centre experience. Radiat Oncol 2019; 14:34. [PMID: 30782197 PMCID: PMC6381740 DOI: 10.1186/s13014-019-1238-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 02/08/2019] [Indexed: 11/12/2022] Open
Abstract
Purpose Salvage surgery of recurrent hypopharyngeal and laryngeal squamous cell carcinoma (SCC) results in limited local control and survival rates. As a result of recent technological progress, radiotherapy (RT) has become a valuable, potentially curative therapeutic option. Thus, we aimed to determine prognostic factors for survival outcome in order to optimize patient selection for salvage radiotherapy after failure of first-line treatment with surgery alone in this special patient cohort. Methods Seventy-five patients (85% male, median age of 64 years) underwent salvage RT in a secondary setting for recurrent hypopharyngeal or laryngeal SCC after prior surgery alone between 2007 and 2017. On average, patients were treated with one prior surgery (range 1–4 surgeries). Median time between surgery and salvage RT was 7 months (range 1–47 months) for initially advanced tumors (T3/4, N+, extracapsular spread) and 18 months (range 5–333 months) for initially early stage tumors. The majority of patients received concomitant chemotherapy (n = 48; 64%) or other kind of systemic treatment concurrent to radiotherapy (n = 10; 13%). Results Median follow-up was 41 months (range 3–120 months). Overall, fifteen patients were diagnosed with local failure (all were in-field) at last follow-up (20%). Median time to recurrence was 35 months (range 3–120 months) and 3-year local progression-free survival (LPFS) was 75%, respectively. Dose-escalated RT with 70.4 Gy applied in 2.1 Gy or 2.2 Gy fractions corresponding an EQD2 > 70 Gy (p = 0.032) and the use of concomitant cisplatin weekly chemotherapy (p = 0.006) had a significant positive impact on LPFS. 3-year OS and DPFS were 76 and 85%, respectively. No toxicity-related deaths occurred. Reported grade > 3 side effects were rare (n = 4/70, 6%). Conclusion Salvage radiotherapy resulted in excellent local control rates while radiation dose and the use of cisplatin weekly chemotherapy were identified as prognostic factors for LPFS. Nevertheless, patient selection for curative salvage treatment remains challenging.
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Affiliation(s)
- Sati Akbaba
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120, Heidelberg, Germany
| | - Thomas Held
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Kristin Lang
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Juliane Hoerner-Rieber
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120, Heidelberg, Germany
| | - Karim Zaoui
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Tobias Forster
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Stefan Rieken
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120, Heidelberg, Germany
| | - Peter Plinkert
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Juergen Debus
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.,Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120, Heidelberg, Germany
| | - Sebastian Adeberg
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany. .,Heidelberg Institute for Radiation Oncology (HIRO), National Center for Radiation Research in Oncology (NCRO), Im Neuenheimer Feld 400, 69120, Heidelberg, Germany. .,Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120, Heidelberg, Germany.
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Jacinto AA, Batalha Filho ES, Viana LDS, De Marchi P, Capuzzo RDC, Gama RR, Boldrini Junior D, Santos CR, Pinto GDJ, Dias JM, Canton HP, Carvalho R, Radicchi LA, Bentzen S, Zubizarreta E, Carvalho AL. Feasibility of concomitant cisplatin with hypofractionated radiotherapy for locally advanced head and neck squamous cell carcinoma. BMC Cancer 2018; 18:1026. [PMID: 30352576 PMCID: PMC6199702 DOI: 10.1186/s12885-018-4893-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Accepted: 10/03/2018] [Indexed: 11/10/2022] Open
Abstract
Background The evolution of radiotherapy over recent decades has reintroduced the hypofractionation for many tumor sites with similar outcomes to those of conventional fractionated radiotherapy. The use of hypofractionation in locally advanced head and neck cancer (LAHNC) has been already used, however, its use has been restricted to only a few countries. The aim of this trial was to evaluate the safety and feasibility of moderate hypofractionated radiotherapy (HYP-RT) with concomitant cisplatin (CDDP). Methods This single-arm trial was designed to evaluate the safety and feasibility of HYP-RT with concomitant CDDP in LAHNC. Stage III and IV patients withnonmetastatic disease were enrolled. Patients were submitted to intensity modulatedradiation therapy, which comprised 55 Gy/20 fractions to the gross tumor and44–48 Gy/20 fractions to the areas of subclinical disease. Concomitant CDDPconsisted of 4 weekly cycles of 35 mg/m2. The primary endpoints were the treatment completion rate and acute toxicity. Results Twenty patients were enrolled from January 2015 to September 2016, and 12 (60%) were classified as unresectable. All patients completed the total dose of radiotherapy, and 19 patients (95%) received at least 3 of 4 cycles of chemotherapy. The median overall treatment time was 29 days (27–34). Grade 4 toxicity was reported twice (1 fatigue and 1 lymphopenia). The rates of grade 3 dermatitis and mucositis were 30% and 40%, respectively, with spontaneous resolution. Nasogastric tubes were offered to 15 patients (75%) during treatment; 4 patients (20%) needed feeding tubes after 2 months, and only 1 patient needed a feeding tube after 12 months. Conclusion HYP-RT with concomitant CDDP was considered feasible for LAHNC, and the rate of acute toxicity was comparable to that of standard concomitant chemoradiation. A feeding tube was necessary for most patients during treatment. Further investigation of this strategy is warranted. Trial registration ClinicalTrials, NCT03194061. Registered 21 Jun 2017 – Retrospectively registered.
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Affiliation(s)
- Alexandre Arthur Jacinto
- Department of Radiation Oncology, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil.
| | | | - Luciano de Souza Viana
- Department of Medical Oncology, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Pedro De Marchi
- Department of Medical Oncology, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Renato de Castro Capuzzo
- Department of Head and Neck, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Ricardo Ribeiro Gama
- Department of Head and Neck, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Domingos Boldrini Junior
- Department of Head and Neck, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Carlos Roberto Santos
- Department of Head and Neck, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Gustavo Dix Junqueira Pinto
- Department of Medical Oncology, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Josiane Mourão Dias
- Department of Medical Oncology, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Heloisa Pelisser Canton
- Department of Radiation Oncology, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Raiany Carvalho
- Department of Head and Neck, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Lucas Augusto Radicchi
- Department of Radiation Oncology, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
| | - Soren Bentzen
- University of Maryland School of Medicine, 655 W. Baltimore Street, Baltimore, MD, 21201, USA
| | - Eduardo Zubizarreta
- International Atomic of Energy Agency - Vienna International Centre, PO Box 100, A-1400, Vienna, Austria
| | - Andre Lopes Carvalho
- Department of Head and Neck, Barretos Cancer Hospital, Rua Antenor Duarte Villela, 1331, Barretos, SP, 14.784-400, Brazil
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Akbaba S, Lang K, Held T, Bulut OC, Mattke M, Uhl M, Jensen A, Plinkert P, Rieken S, Herfarth K, Debus J, Adeberg S. Accelerated Hypofractionated Active Raster-Scanned Carbon Ion Radiotherapy (CIRT) for Laryngeal Malignancies: Feasibility and Safety. Cancers (Basel) 2018; 10:cancers10100388. [PMID: 30340397 PMCID: PMC6211114 DOI: 10.3390/cancers10100388] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 12/23/2022] Open
Abstract
(1) Background: The authors present the first results of active raster-scanned carbon ion radiotherapy (CIRT) for radioresistant laryngeal malignancies regarding efficacy and toxicity. (2) Methods: 15 patients with laryngeal adenoid cystic carcinoma (ACC; n = 8; 53.3%) or chondrosarcoma (CS; n = 7; 46.7%) who underwent radiotherapy with carbon ions (C12) at the Heidelberg Ion Beam Therapy Center (HIT) between 2013 and 2018 were identified retrospectively and analyzed for local control (LC), overall survival (OS), and distant progression-free survival using the Kaplan–Meier method. CIRT was applied either alone (n = 7, 46.7%) or in combination with intensity modulated radiotherapy (IMRT) (n = 8, 53.3%). The toxicity was assessed according to the Common Toxicity Terminology Criteria for Adverse Events (CTCAE) v4.03. (3). Results: the median follow-up was 24 months (range 5–61 months). Overall, the therapy was tolerated very well. No grade >3 acute and chronic toxicity could be identified. The most reported acute grade 3 side effects were acute dysphagia (n = 2; 13%) and acute odynophagia (n = 3; 20%), making supportive nutrition via gastric tube (n = 2; 13.3%) and via high caloric drinks (n = 1; 6.7%) necessary due to swallowing problems (n = 4; 27%). Overall, chronic grade 3 toxicity in the form of chronic hoarseness occurred in 7% of the patients (n = 1; 7%). At the last follow-up, all the patients were alive. No local or locoregional recurrence could be identified. Only one patient with laryngeal ACC developed lung metastases three years after the first diagnosis. (4) Conclusions: the accelerated hypofractionated active raster-scanned carbon ion radiotherapy for radioresistant laryngeal malignancies is feasible in practice with excellent local control rates and moderate acute and late toxicity. Further follow-ups are necessary to evaluate the long-term clinical outcome.
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Affiliation(s)
- Sati Akbaba
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Institute of Radiation Oncology (HIRO), Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120 Heidelberg, Germany.
| | - Kristin Lang
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Institute of Radiation Oncology (HIRO), Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120 Heidelberg, Germany.
| | - Thomas Held
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Institute of Radiation Oncology (HIRO), Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120 Heidelberg, Germany.
| | - Olcay Cem Bulut
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
| | - Matthias Mattke
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Institute of Radiation Oncology (HIRO), Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120 Heidelberg, Germany.
| | - Matthias Uhl
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Institute of Radiation Oncology (HIRO), Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120 Heidelberg, Germany.
| | - Alexandra Jensen
- Department of Radiation Oncology, University Hospital Giessen, Klinikstrasse 33, 35392 Giessen, Germany.
| | - Peter Plinkert
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
| | - Stefan Rieken
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Institute of Radiation Oncology (HIRO), Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120 Heidelberg, Germany.
| | - Klaus Herfarth
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Institute of Radiation Oncology (HIRO), Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120 Heidelberg, Germany.
| | - Juergen Debus
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Institute of Radiation Oncology (HIRO), Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120 Heidelberg, Germany.
| | - Sebastian Adeberg
- Department of Radiation Oncology, University Hospital Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Institute of Radiation Oncology (HIRO), Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.
- Heidelberg Ion-Beam Therapy Center (HIT), Im Neuenheimer Feld 450, 69120 Heidelberg, Germany.
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