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Riggenbach E, Waser M, Mueller SA, Aebersold DM, Giger R, Elicin O. Oncologic outcome with versus without target volume compartmentalization in postoperative radiotherapy for oral cavity squamous cell carcinoma. Front Oncol 2024; 14:1362025. [PMID: 38590644 PMCID: PMC10999524 DOI: 10.3389/fonc.2024.1362025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 03/08/2024] [Indexed: 04/10/2024] Open
Abstract
Background and purpose The volume treated with postoperative radiation therapy (PORT) in patients with oral cavity squamous cell carcinoma (OCSCC) is a mediator of toxicity affecting quality of life. Current guidelines only allow for very limited reduction of PORT volumes. This study investigated the safety and efficacy of de-intensified PORT for patients with OCSCC by refined compartmentalization of the treatment volume. Materials and methods This retrospective cohort study identified 103 OCSCC patients treated surgically from 2014 to 2019 with a loco-regional risk profile qualifying for PORT according to guidelines. PORT was administered only to the at-risk compartment and according to a refined compartmentalization concept (CC). Oncological outcome of this CC cohort was compared to a historical cohort (HC) of 98 patients treated before the CC was implemented. Results Median follow-up time was 4.5 and 4.8 years in the CC and HC cohorts, respectively. In the CC cohort, a total of 72 of 103 patients (70%) had a pathological risk profile that allowed for further compartmentalization and, hence, received a reduced treatment volume or omission of PORT altogether. Loco-regional control at 3 and 5 years was 77% and 73% in the CC cohort versus 78% and 73% in the HC (p = 0.93), progression-free survival was 72% and 64% versus75% and 68% (p = 0.58), respectively. Similarly, no statistically significant difference was seen in other outcome measures. Conclusions De-intensified PORT limiting the treatment volume to the at-risk compartment or avoiding PORT altogether for low-risk patients with OCSCC does not seem to compromise disease control in this retrospective comparison. Based on these hypothesis-generating findings, a prospective study is being planned.
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Affiliation(s)
- Elena Riggenbach
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Manuel Waser
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Simon A. Mueller
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
- Department of Otorhinolaryngology Head and Neck Surgery, University Hospital and University of Zurich, Zurich, Switzerland
| | - Daniel M. Aebersold
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Roland Giger
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Olgun Elicin
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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Dennstädt F, Hastings J, Putora PM, Vu E, Fischer GF, Süveg K, Glatzer M, Riggenbach E, Hà HL, Cihoric N. Exploring Capabilities of Large Language Models such as ChatGPT in Radiation Oncology. Adv Radiat Oncol 2024; 9:101400. [PMID: 38304112 PMCID: PMC10831180 DOI: 10.1016/j.adro.2023.101400] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 10/16/2023] [Indexed: 02/03/2024] Open
Abstract
Purpose Technological progress of machine learning and natural language processing has led to the development of large language models (LLMs), capable of producing well-formed text responses and providing natural language access to knowledge. Modern conversational LLMs such as ChatGPT have shown remarkable capabilities across a variety of fields, including medicine. These models may assess even highly specialized medical knowledge within specific disciplines, such as radiation therapy. We conducted an exploratory study to examine the capabilities of ChatGPT to answer questions in radiation therapy. Methods and Materials A set of multiple-choice questions about clinical, physics, and biology general knowledge in radiation oncology as well as a set of open-ended questions were created. These were given as prompts to the LLM ChatGPT, and the answers were collected and analyzed. For the multiple-choice questions, it was checked how many of the answers of the model could be clearly assigned to one of the allowed multiple-choice-answers, and the proportion of correct answers was determined. For the open-ended questions, independent blinded radiation oncologists evaluated the quality of the answers regarding correctness and usefulness on a 5-point Likert scale. Furthermore, the evaluators were asked to provide suggestions for improving the quality of the answers. Results For 70 multiple-choice questions, ChatGPT gave valid answers in 66 cases (94.3%). In 60.61% of the valid answers, the selected answer was correct (50.0% of clinical questions, 78.6% of physics questions, and 58.3% of biology questions). For 25 open-ended questions, 12 answers of ChatGPT were considered as "acceptable," "good," or "very good" regarding both correctness and helpfulness by all 6 participating radiation oncologists. Overall, the answers were considered "very good" in 29.3% and 28%, "good" in 28% and 29.3%, "acceptable" in 19.3% and 19.3%, "bad" in 9.3% and 9.3%, and "very bad" in 14% and 14% regarding correctness/helpfulness. Conclusions Modern conversational LLMs such as ChatGPT can provide satisfying answers to many relevant questions in radiation therapy. As they still fall short of consistently providing correct information, it is problematic to use them for obtaining medical information. As LLMs will further improve in the future, they are expected to have an increasing impact not only on general society, but also on clinical practice, including radiation oncology.
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Affiliation(s)
- Fabio Dennstädt
- Department of Radiation Oncology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Janna Hastings
- School of Medicine, University of St. Gallen, St. Gallen, Switzerland
- Institute for Implementation Science in Health Care, University of Zurich, Zurich, Switzerland
| | - Paul Martin Putora
- Department of Radiation Oncology, Kantonsspital St. Gallen, St. Gallen, Switzerland
- Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, Switzerland
| | - Erwin Vu
- Department of Radiation Oncology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Galina F. Fischer
- Department of Radiation Oncology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Krisztian Süveg
- Department of Radiation Oncology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Markus Glatzer
- Department of Radiation Oncology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Elena Riggenbach
- Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, Switzerland
| | - Hông-Linh Hà
- Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, Switzerland
| | - Nikola Cihoric
- Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, Switzerland
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3
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Mohamad O, Nicosia L, Mathier E, Riggenbach E, Zamboglou C, Aebersold DM, Alongi F, Shelan M. Focal brachytherapy as definitive treatment for localized prostate cancer: A systematic review and meta-analysis. Brachytherapy 2024:S1538-4721(24)00016-3. [PMID: 38431441 DOI: 10.1016/j.brachy.2024.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 12/06/2023] [Accepted: 01/18/2024] [Indexed: 03/05/2024]
Abstract
PURPOSE In this systematic review and meta-analysis, we describe the oncologic and toxicity outcomes of definitive focal brachytherapy for prostate cancer. METHODS AND MATERIALS A PROSPERO registered study (CRD42023410170) was conducted following the Preferred Reporting Items for Systematic reviews and Meta-analyses (PRISMA) guidelines. PubMed, Embase, and The Cochrane Library were searched for studies between 2000 and 2022. Two authors independently performed the initial search. Biochemical recurrence-free survival (bRFS) was defined as the primary endpoint for the meta-analysis. Generalized linear mixed-effects models were conducted to calculate effect size and quantify heterogeneity. We also describe the side effects and local recurrence patterns of focal brachytherapy. RESULTS Ten studies were identified and included 315 patients treated using focal brachytherapy as a definitive treatment. Mean (SD) age was 67.65 (7.9) years and mean (SD) PSA was 7.15 (2.7) ng/mL. Most patients (n = 236, 75%) underwent LDR Brachytherapy and 25% received HDR brachytherapy. Among the participants, 147 (46.5%) had a Gleason score ≤6, and 169 (53.5%) had a Gleason score ≥7. Only 11 (3.5%) patients received ADT. Overall, bRFS rate at median follow-up 4 years (Range: 1-6.42 years) was 91% (95% confidence interval [CI], 82-95%). Acute Grade ≤ 2 GU and GI toxicities were reported in 22 (7%) and 11 (3.5%) patients, respectively. Late Grade ≤ 2 GU and GI toxicity were reported in 6 (2%) and 14 (4.4%) patients, respectively. One case of prostate hemorrhage due to improper foley removal was noted but otherwise no acute or late Grade 3 or higher GI or GU toxicity related to radiotherapy was reported. CONCLUSION Overall, definitive focal brachytherapy has a favorable toxicity profile. Oncologic outcomes are yet to mature. The evidence is limited by the small number of studies with low patients' number, across study heterogeneity, and possibility of publication bias.
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Affiliation(s)
- Osama Mohamad
- Department of Radiation Oncology, MD Anderson Cancer Center, Houston, TX
| | - Luca Nicosia
- Advanced Radiation Oncology Department, IRCCS Sacro Cuore Don Calabria Hospital, Cancer Care Center, Italy
| | - Etienne Mathier
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Elena Riggenbach
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Constantinos Zamboglou
- Department of Radiation Oncology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Germany; German Oncology Center, University Hospital of the European University, Limassol, Cyprus
| | - Daniel M Aebersold
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Fillipo Alongi
- Advanced Radiation Oncology Department, IRCCS Sacro Cuore Don Calabria Hospital, Cancer Care Center, Italy
| | - Mohamed Shelan
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
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4
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Riggenbach E, Lössl K, Hemmatazad H. [Dose escalation with brachytherapy to increase the organ preservation rate in rectal cancer]. Strahlenther Onkol 2023:10.1007/s00066-023-02101-w. [PMID: 37193802 DOI: 10.1007/s00066-023-02101-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/11/2023] [Indexed: 05/18/2023]
Affiliation(s)
- Elena Riggenbach
- Department of Radiation Oncology, Bern University, Inselspital, Freiburgstr. 10, 3010, Bern, Schweiz.
| | - Kristina Lössl
- Department of Radiation Oncology, Bern University, Inselspital, Freiburgstr. 10, 3010, Bern, Schweiz
| | - Hossein Hemmatazad
- Department of Radiation Oncology, Bern University, Inselspital, Freiburgstr. 10, 3010, Bern, Schweiz
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5
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Ermiş E, Althaus A, Blatti M, Uysal E, Leiser D, Norouzi S, Riggenbach E, Hemmatazad H, Ahmadli U, Wagner F. Therapy Resistance of Glioblastoma in Relation to the Subventricular Zone: What Is the Role of Radiotherapy? Cancers (Basel) 2023; 15:cancers15061677. [PMID: 36980563 PMCID: PMC10046464 DOI: 10.3390/cancers15061677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/02/2023] [Accepted: 03/05/2023] [Indexed: 03/12/2023] Open
Abstract
Glioblastoma is a highly heterogeneous primary malignant brain tumor with marked inter-/intratumoral diversity and a poor prognosis. It may contain a population of neural stem cells (NSC) and glioblastoma stem cells that have the capacity for migration, self-renewal and differentiation. While both may contribute to resistance to therapy, NSCs may also play a role in brain tissue repair. The subventricular zone (SVZ) is the main reservoir of NSCs. This study investigated the impact of bilateral SVZ radiation doses on patient outcomes. We included 147 patients. SVZs were delineated and the dose administered was extracted from dose–volume histograms. Tumors were classified based on their spatial relationship to the SVZ. The dose and outcome correlations were analyzed using the Kaplan–Meier and Cox proportional hazards regression methods. Median progression-free survival (PFS) was 7 months (range: 4–11 months) and median overall survival (OS) was 14 months (range: 9–23 months). Patients with an ipsilateral SVZ who received ≥50 Gy showed significantly better PFS (8 versus 6 months; p < 0.001) and OS (16 versus 11 months; p < 0.001). Furthermore, lower doses (<32 Gy) to the contralateral SVZ were associated with improved PFS (8 versus 6 months; p = 0.030) and OS (15 versus 11 months; p = 0.001). Targeting the potential tumorigenic cells in the ipsilateral SVZ while sparing contralateral NSCs correlated with an improved outcome. Further studies should address the optimization of dose distribution with modern radiotherapy techniques for the areas surrounding infiltrated and healthy SVZs.
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Affiliation(s)
- Ekin Ermiş
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
- Correspondence:
| | - Alexander Althaus
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Marcela Blatti
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Emre Uysal
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Dominic Leiser
- Center for Proton Therapy, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Shokoufe Norouzi
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Elena Riggenbach
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Hossein Hemmatazad
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Uzeyir Ahmadli
- Department of Diagnostic and Interventional Neuroradiology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Franca Wagner
- Department of Diagnostic and Interventional Neuroradiology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
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Reinhardt P, Giger R, Seifert E, Shelan M, Riggenbach E, Terribilini D, Joosten A, Schanne DH, Aebersold DM, Manser P, Dettmer MS, Simon C, Ozsahin EM, Moeckli R, Limacher A, Caparrotti F, Nair D, Bourhis J, Broglie MA, Al-Mamgani A, Elicin O. VoiceS: voice quality after transoral CO 2 laser surgery versus single vocal cord irradiation for unilateral stage 0 and I glottic larynx cancer-a randomized phase III trial. Trials 2022; 23:906. [PMID: 36303192 PMCID: PMC9615245 DOI: 10.1186/s13063-022-06841-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 10/14/2022] [Indexed: 11/10/2022] Open
Abstract
Background Surgery and radiotherapy are well-established standards of care for unilateral stage 0 and I early-stage glottic cancer (ESGC). Based on comparative studies and meta-analyses, functional and oncological outcomes after both treatment modalities are similar. Historically, radiotherapy (RT) has been performed by irradiation of the whole larynx. However, only the involved vocal cord is being treated with recently introduced hypofractionated concepts that result in 8 to 10-fold smaller target volumes. Retrospective data argues for an improvement in voice quality with non-inferior local control. Based on these findings, single vocal cord irradiation (SVCI) has been implemented as a routine approach in some institutions for ESGC in recent years. However, prospective data directly comparing SVCI with surgery is lacking. The aim of VoiceS is to fill this gap. Methods In this prospective randomized multi-center open-label phase III study with a superiority design, 34 patients with histopathologically confirmed, untreated, unilateral stage 0-I ESGC (unilateral cTis or cT1a) will be randomized to SVCI or transoral CO2-laser microsurgical cordectomy (TLM). Average difference in voice quality, measured by using the voice handicap index (VHI) will be modeled over four time points (6, 12, 18, and 24 months). Primary endpoint of this study will be the patient-reported subjective voice quality between 6 to 24 months after randomization. Secondary endpoints will include perceptual impression of the voice via roughness – breathiness – hoarseness (RBH) assessment at the above-mentioned time points. Additionally, quantitative characteristics of voice, loco-regional tumor control at 2 and 5 years, and treatment toxicity at 2 and 5 years based on CTCAE v.5.0 will be reported. Discussion To our knowledge, VoiceS is the first randomized phase III trial comparing SVCI with TLM. Results of this study may lead to improved decision-making in the treatment of ESGC. Trial registration ClinicalTrials.gov NCT04057209. Registered on 15 August 2019. Cantonal Ethics Committee KEK-BE 2019-01506 Supplementary Information The online version contains supplementary material available at 10.1186/s13063-022-06841-5.
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Affiliation(s)
- Philipp Reinhardt
- Department of Radiation Oncology, Bern University Hospital and University of Bern, Inselspital, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Roland Giger
- Department of Oto-Rhino-Laryngology, Head and Neck Surgery, Bern University Hospital and University of Bern, Inselspital, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Eberhard Seifert
- Division of Phoniatrics, Department of Oto-Rhino-Laryngology, Head and Neck Surgery, Bern University Hospital and University of Bern, Inselspital, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Mohamed Shelan
- Department of Radiation Oncology, Bern University Hospital and University of Bern, Inselspital, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Elena Riggenbach
- Department of Radiation Oncology, Bern University Hospital and University of Bern, Inselspital, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Dario Terribilini
- Division of Medical Radiation Physics and Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Andreas Joosten
- Division of Medical Radiation Physics and Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Daniel H Schanne
- Department of Radiation Oncology, Bern University Hospital and University of Bern, Inselspital, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Daniel M Aebersold
- Department of Radiation Oncology, Bern University Hospital and University of Bern, Inselspital, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Peter Manser
- Division of Medical Radiation Physics and Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, Freiburgstrasse 18, 3010, Bern, Switzerland
| | - Matthias S Dettmer
- Department of Pathology, Klinikum Stuttgart, Kriegsbergstraße 60, 70174, Stuttgart, Germany.,Department of Pathology, University of Bern, Murtenstrasse 31, 3010, Bern, Switzerland
| | - Christian Simon
- Department of Otolaryngology - Head and Neck Surgery, CHUV University of Lausanne, Rue du Bugnon, 2, 1011, Lausanne, Switzerland
| | - Esat M Ozsahin
- Department of Radiation Oncology, Lausanne University Hospital and Lausanne University, Rue du Bugnon, 21, 1011, Lausanne, Switzerland
| | - Raphaël Moeckli
- Institut of Radiation Physics, Lausanne University Hospital and Lausanne University, Rue du Grand-Pré 1, 1007, Lausanne, Switzerland
| | - Andreas Limacher
- Clinical Trials Unit Bern, University of Bern, Mittelstrasse 43, 3012, Bern, Switzerland
| | - Francesca Caparrotti
- Department of Radiation Oncology, Genève University Hospital, Rue Gabrielle-Perret-Gentil 4, 1205, Genève, Switzerland
| | - Deepa Nair
- Department of Head Neck Surgical Oncology, ACTREC, Tata Memorial Centre, Homi Bhabha National Institute, Mumbai, 400012, India
| | - Jean Bourhis
- Department of Radiation Oncology, Lausanne University Hospital and Lausanne University, Rue du Bugnon, 21, 1011, Lausanne, Switzerland
| | - Martina A Broglie
- Department of Head and Neck Surgery, University Hospital of Zurich, Rämistrasse 100, 8091, Zürich, Switzerland
| | - Abrahim Al-Mamgani
- Department of Radiation Oncology, Netherlands Cancer Institute/Antoni van Leeuwenhoek, 1066, Amsterdam, CX, Netherlands
| | - Olgun Elicin
- Department of Radiation Oncology, Bern University Hospital and University of Bern, Inselspital, Freiburgstrasse 18, 3010, Bern, Switzerland.
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7
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Elicin O, Vollnberg B, Shelan M, Riggenbach E, Bojaxhiu B, Mathier E, Giger R, Aebersold DM, Klaeser B. Impact of pretreatment second look 18FDG-PET/CT on stage and treatment changes in head and neck cancer. Clin Transl Radiat Oncol 2021; 31:8-13. [PMID: 34504959 PMCID: PMC8414040 DOI: 10.1016/j.ctro.2021.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 08/23/2021] [Accepted: 08/24/2021] [Indexed: 12/05/2022] Open
Abstract
The potential value of a second look PET/CT prior to radiotherapy was investigated. New lymph node metastases were discovered in half of the patients. Progression of the primary tumor and distant metastases were also observed. This strategy led to changes in treatment planning in more than half of the cases.
Background Patients diagnosed with locoregionally advanced head and neck squamous cell carcinoma (LAHNSCC) regularly undergo staging with 18F-FDG PET/CT in our center. In cases of delays in radiotherapy (RT) planning CT more than 4 weeks after initial PET/CT or clinically suspected progress, PET/CT is repeated for restaging and as an RT planning reference. Our aim was to determine the impact of second-look PET/CT on stage migration, treatment change and RT planning. Methods Consequent treatment changes were categorized as minor and major. Minor changes were defined as PET/CT-based modifications of RT plans, e.g., the addition of anatomical compartments, changes in high- and low-risk dose levels or both. Major changes included changes from curative to palliative treatment intent and alterations of interdisciplinary treatment plans, such as the addition of induction chemotherapy, switch to primary surgery, no treatment and/or the necessity of additional diagnostic work-up resulting in the postponement or cancellation of treatment. Results Thirty-two newly diagnosed LAHNSCC patients who were treated between 2014 and 2018 underwent second-look PET/CT (median interval 42.5 days). Second-look PET/CT led to locoregional and distant upstaging in 3/32 and 1/32 patients, respectively. In 1/32 patients (3%), second-look PET/CT led to a palliative approach with systemic treatment. New lymph node metastases were discovered in 16 patients, 6 of whom also showed significant progression of the primary tumor, resulting in minor changes in 16 of the remaining 31 patients (52%) who were treated curatively. Conclusion If RT treatment planning of LAHNSCC was delayed by more than 4 weeks after initial PET/CT staging or when progression was clinically suspected, a second look at 18FDG-PET/CT was performed. This led to changes in treatment planning in more than half of the cases, which is expected to directly influence oncologic outcomes.
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Affiliation(s)
- Olgun Elicin
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Bernd Vollnberg
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Mohamed Shelan
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Elena Riggenbach
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Beat Bojaxhiu
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department of Radiation Oncology, City Hospital Triemli, Zurich, Switzerland
| | - Etienne Mathier
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Roland Giger
- Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Daniel M Aebersold
- Department of Radiation Oncology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Bernd Klaeser
- Department of Nuclear Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department of Radiology and Nuclear Medicine, Cantonal Hospital Winterthur, Winterthur, Switzerland
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8
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Shelan M, Riggenbach E, Aebersold DM. [Virtual prostatectomy using single dose radiotherapy]. Strahlenther Onkol 2021; 197:943-945. [PMID: 34297155 DOI: 10.1007/s00066-021-01824-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/06/2021] [Indexed: 11/28/2022]
Affiliation(s)
- Mohamed Shelan
- Department of Radiation Oncology, Bern University, Inselspital, Freiburgstraße 10, 3010, Bern, Schweiz.
| | - Elena Riggenbach
- Department of Radiation Oncology, Bern University, Inselspital, Freiburgstraße 10, 3010, Bern, Schweiz
| | - Daniel M Aebersold
- Department of Radiation Oncology, Bern University, Inselspital, Freiburgstraße 10, 3010, Bern, Schweiz
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