1
|
Hoste M, Van der Vorst S, Lawson G, Nollevaux MC, Pirson AS, Bachy V, Desgain O, Hassid S, Delahaut G. Reliability and outcomes of lymph nodes biopsy in cT1-cT2 N0 supraglottic laryngeal squamous cell carcinoma. Head Neck 2024. [PMID: 38421075 DOI: 10.1002/hed.27708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 01/22/2024] [Accepted: 02/05/2024] [Indexed: 03/02/2024] Open
Abstract
BACKGROUND In oral and oropharyngeal squamous cell carcinoma (SCC), sentinel node biopsy (SNB) was described as a reliable and reproductive alternative to elective neck dissection for the staging of clinical N0 T1-T2 patients. The SNB technique in supraglottic laryngeal SCC was successfully described in small series. The aim of this study is to analyze retrospectively the results of SNB technique in supraglottic SCC in CHU Godinne, to determine if the technique is reliable and may be proposed in a future multicentral prospective trial. METHODS The study involved a retrospective analysis of 39 patients who underwent surgery between 2003 and 2019 at CHU Godinne. All patients presented with clinical N0 neck status. The SNB procedure included general anesthesia, 99-technetium colloid peritumoral injection, and lymphoscintigraphy. The hand-held gamma probe was utilized for SNB after tumoral resection during the same operating session. Out of 39 patients, 36 underwent SNB as the sole staging tool, while 3 patients received SNB in combination with elective neck dissection. Primary outcome was the 2-years neck recurrence-free survival (RFS). Secondary outcomes were the 2- and 5-years disease-specific survival (DSS). Additionally, sensitivity and negative predictive value (NPV) of the SNB technique were analyzed. RESULTS Sentinel nodes were successfully identified in all 39 patients. An average of 4 nodes excised per patient. Positives SN were detected in 23% (9 in 39) cases, leading to subsequent selective neck dissection. Two cases of neck recurrence were observed, both considered as false negatives, occurring after an average of 3.5 months. Th median follow-up period was 48 months with a 2-year RFS of 95%. Sensitivity and NPV of the SNB technique were found to be 82% and 94%, respectively. Two and five years DSS were 84% and 71.7%, respectively. CONCLUSIONS The results suggest that SNB in T1-T2 supraglottic SCC is a feasible and reliable technique for managing the neck in N0 early-stage patients. However, to establish its oncological equivalence with selective node dissection, further prospective and comparative studies are warranted. The findings of this study underscore the importance of ongoing research in refining and validating the role of SNB in the management of supraglottic SCC, potentially paving the way for more widespread adoption in clinical practice.
Collapse
Affiliation(s)
- Maryline Hoste
- ENT-Head and Neck Surgery Department, CHU-UCL Namur, Mont Godinne, Yvoir, Belgium
| | | | - Georges Lawson
- ENT-Head and Neck Surgery Department, CHU-UCL Namur, Mont Godinne, Yvoir, Belgium
| | | | - Anne-Sophie Pirson
- Department of Nuclear pathology, CHU-UCL Namur, Mont Godinne, Yvoir, Belgium
| | - Vincent Bachy
- ENT-Head and Neck Surgery Department, CHU-UCL Namur, Mont Godinne, Yvoir, Belgium
| | - Olivier Desgain
- ENT-Head and Neck Surgery Department, CHU-UCL Namur, Mont Godinne, Yvoir, Belgium
| | - Samantha Hassid
- ENT-Head and Neck Surgery Department, CHU-UCL Namur, Mont Godinne, Yvoir, Belgium
| | - Gilles Delahaut
- ENT-Head and Neck Surgery Department, CHU-UCL Namur, Mont Godinne, Yvoir, Belgium
| |
Collapse
|
2
|
Ah-Thiane L, Rousseau C, Aumont M, Cailleteau A, Doré M, Mervoyer A, Vaugier L, Supiot S. The Sentinel Lymph Node in Treatment Planning: A Narrative Review of Lymph-Flow-Guided Radiotherapy. Cancers (Basel) 2023; 15:2736. [PMID: 37345071 DOI: 10.3390/cancers15102736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 06/23/2023] Open
Abstract
The sentinel lymph node technique is minimally invasive and used routinely by surgeons, reducing the need for morbid extensive lymph node dissections, which is a significant advantage for cancer staging and treatment decisions. The sentinel lymph node could also help radiation oncologists to identify tumor drainage for each of their patients, leading to a more personalized radiotherapy, instead of a probabilistic irradiation based on delineation atlases. The aim is both to avoid recurrence in unexpected areas and to limit the volume of irradiated healthy tissues. The aim of our study is to evaluate the impact of sentinel lymph node mapping for radiation oncologists. This concept, relying on sentinel lymph node mapping for treatment planning, is known as lymph-flow-guided radiotherapy. We present an up-to-date narrative literature review showing the potential applications of the sentinel lymph node technique for radiotherapy, as well as the limits that need to be addressed before its routine usage.
Collapse
Affiliation(s)
- Loic Ah-Thiane
- Department of Radiotherapy, ICO René Gauducheau, Boulevard Jacques Monod, 44800 St-Herblain, France
| | - Caroline Rousseau
- Department of Nuclear Medicine, ICO René Gauducheau, Boulevard Jacques Monod, 44800 St-Herblain, France
- CRCI2NA, UMR 1307 Inserm-UMR 6075 CNRS, Nantes University, 44000 Nantes, France
| | - Maud Aumont
- Department of Radiotherapy, ICO René Gauducheau, Boulevard Jacques Monod, 44800 St-Herblain, France
| | - Axel Cailleteau
- Department of Radiotherapy, ICO René Gauducheau, Boulevard Jacques Monod, 44800 St-Herblain, France
| | - Mélanie Doré
- Department of Radiotherapy, ICO René Gauducheau, Boulevard Jacques Monod, 44800 St-Herblain, France
| | - Augustin Mervoyer
- Department of Radiotherapy, ICO René Gauducheau, Boulevard Jacques Monod, 44800 St-Herblain, France
| | - Loig Vaugier
- Department of Radiotherapy, ICO René Gauducheau, Boulevard Jacques Monod, 44800 St-Herblain, France
| | - Stéphane Supiot
- Department of Radiotherapy, ICO René Gauducheau, Boulevard Jacques Monod, 44800 St-Herblain, France
- CRCI2NA, Inserm UMR 1232, CNRS ERL 6001, Nantes University, 44000 Nantes, France
| |
Collapse
|
3
|
Driessen DAJJ, Arens AIJ, Dijkema T, Weijs WLJ, Draaijer LC, van den Broek GB, Takes RP, Honings J, Kaanders JHAM. Sentinel node identification in laryngeal and pharyngeal carcinoma after flexible endoscopy-guided tracer injection under topical anesthesia: A feasibility study. Head Neck 2023; 45:1359-1366. [PMID: 36942817 DOI: 10.1002/hed.27347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/02/2023] [Accepted: 03/06/2023] [Indexed: 03/23/2023] Open
Abstract
BACKGROUND The aim of this study was to investigate the feasibility of flexible endoscopy-guided tracer injection for sentinel lymph node (SLN) identification in patients with laryngeal and pharyngeal carcinoma. METHODS Sixteen cT1-4N0-2M0 patients with laryngeal or pharyngeal carcinoma underwent intra- and peritumoral [99m Tc]Tc-nanocolloid injections after topical anesthesia under endoscopic guidance. SPECT-CT scans were performed at two time points. RESULTS Tracer injection and visualization of SLNs was successful in 15/16 (94%) patients. Median number of tracer injections was 1 intratumoral and 3 peritumoral. The median duration of the endoscopic procedure including tracer injection after biopsy taking was 7 min (range 4-16 min). A total of 28 SLNs were identified which were all visualized on the early and late SPECT-CT. Most SLNs were visualized in neck levels II and III. CONCLUSIONS Flexible endoscopy-guided tracer injection for SLN identification is a feasible and fast procedure in laryngeal and pharyngeal carcinoma patients.
Collapse
Affiliation(s)
- Daphne A J J Driessen
- Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Anne I J Arens
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Tim Dijkema
- Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Willem L J Weijs
- Department of Oral- and Maxillofacial Surgery and Head and Neck Surgery, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Lisette C Draaijer
- Department of Otorhinolaryngology - Head and Neck Surgery, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Guido B van den Broek
- Department of Otorhinolaryngology - Head and Neck Surgery, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Robert P Takes
- Department of Otorhinolaryngology - Head and Neck Surgery, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Jimmie Honings
- Department of Otorhinolaryngology - Head and Neck Surgery, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Johannes H A M Kaanders
- Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, the Netherlands
| |
Collapse
|
4
|
Eltelety AM, Abou-Zeid MA, Abdelmalek ME, Nassar AA. Assessment of Occult Nodal Micrometastases to the Clinically Negative Contralateral Neck in Locally Advanced Supraglottic Squamous Cell Carcinoma. Indian J Otolaryngol Head Neck Surg 2022; 74:369-374. [PMID: 36213478 PMCID: PMC9535062 DOI: 10.1007/s12070-021-02806-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 08/08/2021] [Indexed: 10/20/2022] Open
Abstract
The aim of this study is to study the incidence of occult nodal micrometastases (ONM) in the contralateral neck and compare it to the laterality of the primary tumor. Retrospective analysis of the medical records of patients with locally advanced supraglottic squamous cell carcinoma and Clinically negative contralateral neck (cN0-CLN) - who had concurrent total laryngectomy and bilateral neck dissection as their primary treatment at the Otolaryngology Department, Al Kas Al Ainy School of Medicine-Cairo University between 2015 and 2020 - was conducted. Patients were divided into 3 groups according to the extent of the primary tumor. 28 patients met the inclusion criteria. Patients with well-lateralized tumors were 14 (Group A), tumors abutting the midline were 4 (Group B) and tumors significantly involving the contralateral side were 14 (Group C). There was no statistically significant difference in age of patients among the three groups. Eleven patients had cervical lymphadenopathy in the final pathology reports. Seven patients had ONM, all of whom were among group C patients (7/14; 50%). The degree of tumor differentiation was not associated with the presence of ONM. Treatment of the cN0-CLN is justified in locally advance supraglottic carcinoma significantly crossing the midline. The total number of patients with ONM in the cN0-CLN exceeds the threshold for observation, however the authors could not recommend or refute the practice of routine prophylactic treatment of the cN0-CLN as none of the patients-in this study-with well-lateralized tumors or tumors just abutting the midline showed ONM.
Collapse
Affiliation(s)
- Ahmad Mohamed Eltelety
- Otolaryngology Department, Al Kasr Al Ainy School of Medicine, Cairo University, Al Kasr Al Ainy, ElManial, Cairo, 11562 Egypt
| | - Mohamed Aly Abou-Zeid
- Otolaryngology Department, Al Kasr Al Ainy School of Medicine, Cairo University, Al Kasr Al Ainy, ElManial, Cairo, 11562 Egypt
| | - Mena Esmat Abdelmalek
- Otolaryngology Department, Al Kasr Al Ainy School of Medicine, Cairo University, Al Kasr Al Ainy, ElManial, Cairo, 11562 Egypt
| | - Ahmed Amin Nassar
- Otolaryngology Department, Al Kasr Al Ainy School of Medicine, Cairo University, Al Kasr Al Ainy, ElManial, Cairo, 11562 Egypt
| |
Collapse
|
5
|
Novikov SN, Krzhivitskii PI, Radgabova ZA, Kotov MA, Girshovich MM, Artemyeva AS, Melnik YS, Kanaev SV. Single photon emission computed tomography-computed tomography visualization of sentinel lymph nodes for lymph flow guided nodal irradiation in oral tongue cancer. Radiat Oncol J 2021; 39:193-201. [PMID: 34610658 PMCID: PMC8497868 DOI: 10.3857/roj.2021.00395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 06/09/2021] [Indexed: 11/03/2022] Open
Abstract
PURPOSE To evaluate correlation of single photon emission computed tomography-computed tomography (SPECT-CT) data on lymph flow (LF) from oral tongue cancer (OC) and the topography of lymph nodes (LN) metastases; to determine the clinical value of lymph flow guided radiotherapy (LFGRT). MATERIALS AND METHODS SPECT-CT visualization of LF from the OC lesions was performed after peritumoral injection of 99mTc-phytate in 26 primary patients with clinical stage cT1-2N0M0 disease. We determined the individual drainage (unilateral/bilateral) from the tumor, and localization of sentinel LNs according to the neck levels. Metastases in LNs were verified with histology and a 2-year follow-up. RESULTS SPECT-CT detected bilateral LF in 10 (38.5%) of 26 patients; in 16 (61.5%) cases the drainage was unilateral. Histology revealed LNs metastases in three cases; regional recurrences were diagnosed in other four patients. In all seven observations metastases were located at the same site and level as the sentinel LNs. In eight (30.8%) of 26 patients sentinel LNs were visualized unilaterally at levels Ib-IIa; in five cases, unilaterally at levels I-IIa-III. In these patients, LFGRT demonstrated 59%-70% reduction of irradiated volume, and 26%-42% and 51%-70% decrease of the mean dose to the spinal cord and the contralateral parotid gland. In patients with a bilateral drainage the reduction of doses absorbed by the spinal cord and contralateral parotid gland was 19% and 6%, respectively. CONCLUSION Localization of sentinel LNs determined by SPECT-CT corresponds to the localization of metastatic LNs in terms of side and levels.
Collapse
Affiliation(s)
- Sergey Nikolaevich Novikov
- Department of Radiation Oncology & Nuclear Medicine, N.N. Petrov National Medical Research Center of Oncology, St. Petersburg, Russia
| | - Pavel Ivanovich Krzhivitskii
- Department of Radiation Oncology & Nuclear Medicine, N.N. Petrov National Medical Research Center of Oncology, St. Petersburg, Russia
| | - Zamira Achmedovna Radgabova
- Department of Head and Neck Surgery, N.N. Petrov National Medical Research Center of Oncology, St Petersburg, Russia
| | - Maxim Andreevitch Kotov
- Department of Head and Neck Surgery, N.N. Petrov National Medical Research Center of Oncology, St Petersburg, Russia
| | - Mikhail Markovich Girshovich
- Department of Radiation Oncology & Nuclear Medicine, N.N. Petrov National Medical Research Center of Oncology, St. Petersburg, Russia
| | - Anna Sergeevna Artemyeva
- Department of Pathology, N.N. Petrov National Medical Research Center of Oncology, St Petersburg, Russia
| | - Yulia Sergeevna Melnik
- Department of Radiation Oncology & Nuclear Medicine, N.N. Petrov National Medical Research Center of Oncology, St. Petersburg, Russia
| | - Sergey Vasilevich Kanaev
- Department of Radiation Oncology & Nuclear Medicine, N.N. Petrov National Medical Research Center of Oncology, St. Petersburg, Russia
| |
Collapse
|
6
|
Driessen DAJJ, Dijkema T, Weijs WLJ, Takes RP, Pegge SAH, Zámecnik P, van Engen-van Grunsven ACH, Scheenen TWJ, Kaanders JHAM. Novel Diagnostic Approaches for Assessment of the Clinically Negative Neck in Head and Neck Cancer Patients. Front Oncol 2021; 10:637513. [PMID: 33634033 PMCID: PMC7901951 DOI: 10.3389/fonc.2020.637513] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 12/21/2020] [Indexed: 02/06/2023] Open
Abstract
In head and neck cancer, the presence of nodal disease is a strong determinant of prognosis and treatment. Despite the use of modern multimodality diagnostic imaging, the prevalence of occult nodal metastases is relatively high. This is why in clinically node negative head and neck cancer the lymphatics are treated “electively” to eradicate subclinical tumor deposits. As a consequence, many true node negative patients undergo surgery or irradiation of the neck and suffer from the associated and unnecessary early and long-term morbidity. Safely tailoring head and neck cancer treatment to individual patients requires a more accurate pre-treatment assessment of nodal status. In this review, we discuss the potential of several innovative diagnostic approaches to guide customized management of the clinically negative neck in head and neck cancer patients.
Collapse
Affiliation(s)
- Daphne A J J Driessen
- Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Tim Dijkema
- Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Willem L J Weijs
- Department of Oral- and Maxillofacial Surgery and Head and Neck Surgery, Radboud University Medical Center, Nijmegen, Netherlands
| | - Robert P Takes
- Department of Otorhinolaryngology and Head and Neck Surgery, Radboud University Medical Center, Nijmegen, Netherlands
| | - Sjoert A H Pegge
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, Netherlands
| | - Patrik Zámecnik
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, Netherlands
| | | | - Tom W J Scheenen
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, Netherlands
| | | |
Collapse
|
7
|
de Almeida JR, Seungyeon Kim V, O'Sullivan B, Goldstein DP, Bratman SV, Hui Huang S, Su J, Xu W, Parulekar W, Waldron JN, Hosni A. Comparing unilateral vs. bilateral neck management in lateralized oropharyngeal cancer between surgical and radiation oncologists: An international practice pattern survey. Oral Oncol 2021; 114:105165. [PMID: 33524796 DOI: 10.1016/j.oraloncology.2020.105165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/07/2020] [Accepted: 12/25/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Management of the neck in oropharyngeal carcinoma varies due to a lack of clarity of patterns of lymphatic drainage and concern of failure in the contralateral neck. With recent advances in transoral surgical techniques, surgical management has become increasingly prevalent as the primary treatment modality. We compare international practice patterns between surgical and radiation oncologists. METHODS A survey of neck management practice patterns was developed and pilot tested by 6 experts. The survey comprised items eliciting the nature of clinical practice, as well as patterns of neck management depending on extent of nodal disease and location and extent of primary site disease. Proportions of surgical and radiation oncologists treating the neck bilaterally were compared using the chi-squared statistic. RESULTS Two-hundred and twenty-two responses were received from 172 surgical oncologists, 44 radiation oncologists, 3 medical oncologists, and 3 non-oncologists from 32 different countries. For tongue base cancers within 1 cm of midline (67% vs. 100%, p < 0.001), and for tonsil cancers with extension to the medial 1/3 of the soft palate (65% vs. 100%, p < 0.001) or tongue base (77% vs. 100%, p < 0.001), surgical oncologists were less likely to treat the neck bilaterally. For isolated tonsil fossa cancers with no nodal disease, both surgical and radiation oncologists were similarly likely to treat unilaterally (99% vs. 97%, p = NS). However, with increasing nodal burden, radiation oncologists were more likely to treat bilaterally for scenarios with a single node < 3 cm (15% vs. 2%, p < 0.001), a single node with extranodal extension (41% vs. 18%, p < 0.001), multiple positive nodes (55% vs. 23% p < 0.001), and node(s) > 6 cm (86% vs. 33%, p < 0.001). For tumors with midline extension, even with a negative PET in the contralateral neck, the majority of surgical and radiation oncologists would still treat the neck bilaterally (53% and 84% respectively). CONCLUSIONS The present study demonstrates significant practice pattern variability for management of the neck in patients with lateralized oropharyngeal carcinoma. Surgical oncologists are less likely to treat the neck bilaterally, regardless of tumor location or nodal burden. Even in the absence of disease in the contralateral neck on imaging, them majority of practitioners are likely to treat bilaterally when the disease approaches midline.
Collapse
Affiliation(s)
- John R de Almeida
- Department of Otolaryngology-Head and Neck Surgery, Department of Surgical Oncology, Princess Margaret Cancer Centre-University Health Network, University of Toronto, Canada.
| | - Valerie Seungyeon Kim
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Canada
| | - Brian O'Sullivan
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Canada
| | - David P Goldstein
- Department of Otolaryngology-Head and Neck Surgery, Department of Surgical Oncology, Princess Margaret Cancer Centre-University Health Network, University of Toronto, Canada
| | - Scott V Bratman
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Canada
| | - Shao Hui Huang
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Canada
| | - Jie Su
- Department of Biostatistics, Princess Margaret Cancer Centre, University of Toronto, Canada
| | - Wei Xu
- Department of Biostatistics, Princess Margaret Cancer Centre, University of Toronto, Canada
| | | | - John N Waldron
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Canada
| | - Ali Hosni
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Canada
| |
Collapse
|
8
|
de Koekkoek-Doll PK, Maas M, Vogel W, Castelijns J, Smit L, Zavrakidis I, Beets-Tan R, van den Brekel M. Real-Time Ultrasound Image Fusion with FDG-PET/CT to Perform Fused Image-Guided Fine-Needle Aspiration in Neck Nodes: Feasibility and Diagnostic Value. AJNR Am J Neuroradiol 2021; 42:566-572. [PMID: 33509917 DOI: 10.3174/ajnr.a6938] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 09/29/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND PURPOSE New imaging techniques such as hybrid imaging of ultrasound and FDG-PET/CT are available but not yet investigated for node staging. The aim of the study was to evaluate the feasibility and added diagnostic value of real-time image-fused ultrasound-guided fine-needle aspiration with FDG-PET/CT data for node staging. MATERIALS AND METHODS Ninety-six patients who were referred for cervical lymph node staging with FDG-PET/CT before ultrasound were prospectively included. After routine ultrasound-guided fine-needle aspiration, all FDG-PET-positive nodes were marked on FDG-PET/CT, and real-time image fusing of ultrasound and FDG-PET/CT was performed using the electromagnetic navigation system PercuNav. Already-punctured nodes were confirmed to be PET-positive, and additional fused-ultrasound-guided fine-needle aspiration was performed in previously missed PET-positive nodes. RESULTS Of 96 patients, 87 (91%) patients had suspicious nodes requiring fine-needle aspiration cytology. Ultrasound-guided fine-needle aspiration was performed in 175 nodes. Cytology was inconclusive in 9/175 (5%) nodes, and 85/166 (51%) nodes were malignant. Target planning was performed in 201 PET-positive nodes; 195/201 (97%) of those nodes were fused successfully. Twenty of 175 ultrasound-guided fine-needle aspiration nodes turned out to be FDG-PET-negative, and 149/175 (85%) of the fused ultrasound-guided fine-needle aspiration nodes were confirmed to be FDG-PET-positive. Of 201 PET-positive nodes, 46 (23%) were additionally identified, and fused ultrasound-guided fine-needle aspiration was performed. Cytology was inconclusive in 4/46 nodes (9%), and 13/42 (31%) nodes were malignant. CONCLUSIONS Real-time ultrasound image fusion with FDG-PET-positive nodes is feasible in cervical lymph nodes, and fused ultrasound-guided fine-needle aspiration increases the number of malignant nodes detected.
Collapse
Affiliation(s)
| | - M Maas
- From the Departments of Radiology (P.K.d.K.-D., M.M., J.C., R.B.-T.)
| | - W Vogel
- Nuclear Medicine (W.V.).,Radiation Oncology (W.V.)
| | - J Castelijns
- From the Departments of Radiology (P.K.d.K.-D., M.M., J.C., R.B.-T.)
| | | | - I Zavrakidis
- Epidemiology and Biostatistics (I.Z.), Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - R Beets-Tan
- From the Departments of Radiology (P.K.d.K.-D., M.M., J.C., R.B.-T.)
| | - M van den Brekel
- Head and Neck Surgery and Oncology (M.v.d.B.).,Department of Maxillofacial Surgery (M.v.d.B.), Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| |
Collapse
|
9
|
Kågedal Å, Margolin G, Held C, da Silva PFN, Piersiala K, Munck-Wikland E, Jacobsson H, Häyry V, Cardell LO. A Novel Sentinel Lymph Node Approach in Oral Squamous Cell Carcinoma. Curr Pharm Des 2021; 26:3834-3839. [PMID: 32053068 DOI: 10.2174/1381612826666200213100750] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 02/08/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Occult metastases are common in patients with oral squamous cell carcinoma (OSCC) which is why elective neck dissection, adjuvant radiotherapy or watchful waiting have been treatment options after surgical removal of the primary tumour. Sentinel lymph node biopsy (SLNB) has lately emerged as a novel possibility in treatment planning. OBJECTIVES To establish a reliable and clinically useful protocol for SLNB in staging/elective neck dissection in oral cancer. METHODS Fourteen consecutive patients with T1-T2 N0 oral cancer were enrolled when scheduled for elective neck dissection. RESULTS This study outlines various techniques for improving SLNB in head and neck cancer. After evaluation, a combination of techniques was found to constitute a reliable, clinically adaptable work concept. The suggested procedure starts with the pre-surgical injection of radioactive technetium 99Tcm carried on tilmanocept (Lymphoseek ®) at the tumour site. The radioactivity in the lymph node is then visualized preoperatively with Single Photon Emission Computed Tomography (SPECT/CT). Intraoperatively, indocyanine green (ICG) is injected and a sentinel node is visualized with near-infrared light. To support the sentinel node detection, the surgeon uses a hand-held gamma detection probe. This approach results in a reproducible and reliable detection of sentinel nodes. CONCLUSION This paper presents a novel protocol for the identification of the sentinel node in the head and neck region. The protocol additionally enables the use of flow cytometry analysis of resected lymph nodes.
Collapse
Affiliation(s)
- Åsa Kågedal
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Gregori Margolin
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Cornelia Held
- Department of Medical Radiation Physics and Nuclear Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Pedro F N da Silva
- Department of Pathology and Cytology, Karolinska University Hospital, Stockholm, Sweden
| | - Krzysztof Piersiala
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Eva Munck-Wikland
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Hans Jacobsson
- Department of Medical Radiation Physics and Nuclear Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Valtteri Häyry
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Lars O Cardell
- Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| |
Collapse
|
10
|
Deschuymer S, Nevens D, Duprez F, Daisne JF, Voordeckers M, De Neve W, Nuyts S. Randomized Clinical Trial on Reduction of Radiotherapy Dose to the Elective Neck in Head and Neck Squamous Cell Carcinoma: Results on the Quality of Life. Qual Life Res 2020; 30:117-127. [PMID: 32920767 DOI: 10.1007/s11136-020-02628-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/02/2020] [Indexed: 01/06/2023]
Abstract
PURPOSE A randomized trial was initiated to investigate whether a reduction of the dose to the elective nodal sites would result in less toxicity and improvement in Quality of Life (QoL) without compromising tumor control. This paper aimed to compare QoL in both treatment arms. METHODS Two-hundred head and neck cancer patients treated with radiotherapy (RT) or chemo-RT were randomized (all stages, mean age: 60 years, M/F: 82%/18%). The elective nodal volumes of patients randomized in the experimental arm were treated up to a 40 Gy equivalent dose. In the standard arm, the elective nodal volumes were treated up to a 50 Gy equivalent dose. The QoL data were collected using The European Organization for Research and Treatment of Cancer (EORTC) core questionnaire QLQ-C30 and the EORTC Head and Neck Cancer module (H&N35). RESULTS A trend toward less decline in QoL during treatment was observed in the 40 Gy arm compared to the 50 Gy arm. Statistically significant differences for global health status, physical functioning, emotional functioning, speech problems, and trouble with social eating in favor of the 40 Gy arm were observed. A clinically relevant better outcome in the 40 Gy arm was found for physical functioning at the end of therapy. CONCLUSION QoL during RT for head and neck cancer tends to be less impaired in the 40 Gy arm. However, reducing the dose only on the elective neck does not result in clinically relevant improvement of QoL. Therefore, additional treatment strategies must be examined to further improve the QoL of HNSCC patients.
Collapse
Affiliation(s)
- S Deschuymer
- Department of Radiation Oncology, KU Leuven - University of Leuven, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - D Nevens
- Department of Radiation Oncology, KU Leuven - University of Leuven, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium
- Department of Radiation Oncology, Iridium Kanker Netwerk, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - F Duprez
- Department of Radiotherapy-Oncology, Ghent University Hospital, Ghent, Belgium
| | - J F Daisne
- Department of Radiation Oncology, KU Leuven - University of Leuven, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium
- Department of Radiation Oncology, Université Catholique de Louvain, CHU-UCL-Namur, Site Ste-Elisabeth, Namur, Belgium
| | - M Voordeckers
- Department of Radiation Oncology, UZ Brussel, Vrije Universiteit Brussel, Brussel, Belgium
| | - W De Neve
- Department of Radiotherapy-Oncology, Ghent University Hospital, Ghent, Belgium
| | - S Nuyts
- Department of Radiation Oncology, KU Leuven - University of Leuven, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.
| |
Collapse
|
11
|
Gamez ME, Blakaj A, Zoller W, Bonomi M, Blakaj DM. Emerging Concepts and Novel Strategies in Radiation Therapy for Laryngeal Cancer Management. Cancers (Basel) 2020; 12:cancers12061651. [PMID: 32580375 PMCID: PMC7352689 DOI: 10.3390/cancers12061651] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/14/2020] [Accepted: 06/15/2020] [Indexed: 12/19/2022] Open
Abstract
Laryngeal squamous cell carcinoma is the second most common head and neck cancer. Its pathogenesis is strongly associated with smoking. The management of this disease is challenging and mandates multidisciplinary care. Currently, accepted treatment modalities include surgery, radiation therapy, and chemotherapy—all focused on improving survival while preserving organ function. Despite changes in smoking patterns resulting in a declining incidence of laryngeal cancer, the overall outcomes for this disease have not improved in the recent past, likely due to changes in treatment patterns and treatment-related toxicities. Here, we review emerging concepts and novel strategies in the use of radiation therapy in the management of laryngeal squamous cell carcinoma that could improve the relationship between tumor control and normal tissue damage (therapeutic ratio).
Collapse
Affiliation(s)
- Mauricio E. Gamez
- Division of Radiation Oncology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (W.Z.); (D.M.B.)
- Correspondence:
| | - Adriana Blakaj
- Department of Therapeutic Radiology, Yale School of Medicine, 35 Park St., New Haven, CT 06519, USA;
| | - Wesley Zoller
- Division of Radiation Oncology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (W.Z.); (D.M.B.)
| | - Marcelo Bonomi
- Department of Internal Medicine, Division of Medical Oncology, The Ohio State University Wexner Medical Center, 320 West 10th Avenue, Columbus, OH 43210, USA;
| | - Dukagjin M. Blakaj
- Division of Radiation Oncology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (W.Z.); (D.M.B.)
| |
Collapse
|
12
|
de Veij Mestdagh PD, Walraven I, Vogel WV, Schreuder WH, van Werkhoven E, Carbaat C, Donswijk ML, van den Brekel MW, Al-Mamgani A. SPECT/CT-guided elective nodal irradiation for head and neck cancer is oncologically safe and less toxic: A potentially practice-changing approach. Radiother Oncol 2020; 147:56-63. [DOI: 10.1016/j.radonc.2020.03.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/19/2020] [Accepted: 03/06/2020] [Indexed: 01/16/2023]
|
13
|
Thomas CM, Khan MN, Mohan R, Hendler A, Hosni A, Chepeha DB, Goldstein DP, Cooper RM, Almeida JR. Lymphatic mapping with SPECT‐CT for evaluation of contralateral drainage in lateralized oropharyngeal cancers using an awake injection technique. Head Neck 2019; 42:385-393. [DOI: 10.1002/hed.26011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 09/25/2019] [Accepted: 10/30/2019] [Indexed: 01/08/2023] Open
Affiliation(s)
- Carissa M. Thomas
- Department of Otolaryngology – Head and Neck Surgery, Princess Margaret Cancer CentreUniversity Health Network, University of Toronto Toronto Ontario Canada
- Department of Surgical Oncology, Princess Margaret Cancer CentreUniversity Health Network Toronto Ontario Canada
| | - Mohemmed N. Khan
- Department of Otolaryngology – Head and Neck Surgery, Princess Margaret Cancer CentreUniversity Health Network, University of Toronto Toronto Ontario Canada
- Department of Surgical Oncology, Princess Margaret Cancer CentreUniversity Health Network Toronto Ontario Canada
| | - Ravi Mohan
- Department of AnesthesiaUniversity of Toronto Toronto Ontario Canada
| | - Aaron Hendler
- Department of AnesthesiaUniversity of Toronto Toronto Ontario Canada
| | - Ali Hosni
- Department of Radiation OncologyUniversity of Toronto Toronto Ontario Canada
| | - Douglas B. Chepeha
- Department of Otolaryngology – Head and Neck Surgery, Princess Margaret Cancer CentreUniversity Health Network, University of Toronto Toronto Ontario Canada
- Department of Surgical Oncology, Princess Margaret Cancer CentreUniversity Health Network Toronto Ontario Canada
| | - David P. Goldstein
- Department of Otolaryngology – Head and Neck Surgery, Princess Margaret Cancer CentreUniversity Health Network, University of Toronto Toronto Ontario Canada
- Department of Surgical Oncology, Princess Margaret Cancer CentreUniversity Health Network Toronto Ontario Canada
| | - Richard M Cooper
- Department of AnesthesiaUniversity of Toronto Toronto Ontario Canada
| | - John R. Almeida
- Department of Otolaryngology – Head and Neck Surgery, Princess Margaret Cancer CentreUniversity Health Network, University of Toronto Toronto Ontario Canada
- Department of Surgical Oncology, Princess Margaret Cancer CentreUniversity Health Network Toronto Ontario Canada
| |
Collapse
|
14
|
de Veij Mestdagh PD, Schreuder WH, Vogel WV, Donswijk ML, van Werkhoven E, van der Wal JE, Dirven R, Karakullukcu B, Sonke JJ, van den Brekel MWM, Marijnen CAM, Al-Mamgani A. Mapping of sentinel lymph node drainage using SPECT/CT to tailor elective nodal irradiation in head and neck cancer patients (SUSPECT-2): a single-center prospective trial. BMC Cancer 2019; 19:1110. [PMID: 31727019 PMCID: PMC6857144 DOI: 10.1186/s12885-019-6331-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 11/04/2019] [Indexed: 11/10/2022] Open
Abstract
Background The majority of patients with head and neck squamous cell carcinoma (HNSCC) receive bilateral elective nodal irradiation (ENI), in order to reduce the risk of regional failure. Bilateral ENI, as compared to unilateral ENI, is associated with higher incidence of acute and late radiation-induced toxicity with subsequent deterioration of quality of life. Increasing evidence that the incidence of contralateral regional failure (cRF) in lateralized HNSCC is very low (< 10%) suggests that it can be justified to treat selected patients unilaterally. This trial aims to minimize the proportion of patients that undergo bilateral ENI, by using lymph drainage mapping by SPECT/CT to select patients with a minimal risk of contralateral nodal failure for unilateral elective nodal irradiation. Methods In this one-armed, single-center prospective trial, patients with primary T1-4 N0-2b HNSCC of the oral cavity, oropharynx, larynx (except T1 glottic) or hypopharynx, not extending beyond the midline and planned for primary (chemo) radiotherapy, are eligible. After 99mTc-nanocolloid tracer injection in and around the tumor, lymphatic drainage is visualized using SPECT/CT. In case of contralateral lymph drainage, a contralateral sentinel node procedure is performed on the same day. Patients without contralateral lymph drainage, and patients with contralateral drainage but without pathologic involvement of any removed contralateral sentinel nodes, receive unilateral ENI. Only when tumor cells are found in a contralateral sentinel node the patient will be treated with bilateral ENI. The primary endpoint is cumulative incidence of cRF at 1 and 2 years after treatment. Secondary endpoints are radiation-related toxicity and quality of life. The removed lymph nodes will be studied to determine the prevalence of occult metastatic disease in contralateral sentinel nodes. Discussion This single-center prospective trial aims to reduce the incidence and duration of radiation-related toxicities and improve quality of life of HNSCC patients, by using lymph drainage mapping by SPECT/CT to select patients with a minimal risk of contralateral nodal failure for unilateral elective nodal irradiation. Trial registration ClinicalTrials.gov Identifier: NCT03968679, date of registration: May 30, 2019.
Collapse
Affiliation(s)
- Pieter D de Veij Mestdagh
- Department of Radiation Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands.
| | - Willem H Schreuder
- Department of Head and Neck Surgery, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Wouter V Vogel
- Department of Radiation Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands.,Department of Nuclear Medicine, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Maarten L Donswijk
- Department of Nuclear Medicine, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Eric van Werkhoven
- Department of Biometrics, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | | | - Richard Dirven
- Department of Head and Neck Surgery, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Baris Karakullukcu
- Department of Head and Neck Surgery, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Jan-Jakob Sonke
- Department of Radiation Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands
| | | | - Corrie A M Marijnen
- Department of Radiation Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands
| | - Abrahim Al-Mamgani
- Department of Radiation Oncology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066, CX, Amsterdam, The Netherlands
| |
Collapse
|
15
|
de Bree R, Dankbaar JW, de Keizer B. New Developments in Sentinel Lymph Node Biopsy Procedure in Localized Oral Cancer. JAMA Otolaryngol Head Neck Surg 2019; 145:741-742. [DOI: 10.1001/jamaoto.2019.1342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Remco de Bree
- Department of Head and Neck Surgical Oncology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Jan Willem Dankbaar
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Bart de Keizer
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Utrecht, the Netherlands
| |
Collapse
|
16
|
de Veij Mestdagh PD, van Werkhoven E, Navran A, de Boer JP, Schreuder WH, Vogel WV, Al-Mamgani A. Incidence of contralateral regional failure in the electively irradiated contralateral neck of patients with head and neck squamous cell carcinoma. Clin Transl Radiat Oncol 2019; 17:7-13. [PMID: 31061901 PMCID: PMC6488558 DOI: 10.1016/j.ctro.2019.04.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 04/18/2019] [Indexed: 12/18/2022] Open
Abstract
Contralateral regional failure still occurs after bilateral nodal irradiation. No significant predictive factors were identified for contralateral regional failure. Overall survival did not differ between patients with ipsi- or contralateral failure.
Background The vast majority of patients with head and neck squamous cell carcinoma (HNSCC) routinely undergo elective nodal irradiation (ENI) to both sides of the neck. Little is known about the extent to which bilateral ENI prevents regional failure (RF) and contralateral RF (cRF) in particular, while such knowledge is necessary to evaluate the results of more selective approaches like unilateral ENI. We investigated the rate and pattern of RF after bilateral ENI, the rate of cRF in the electively irradiated contralateral neck, and tried to identify risk factors for development of cRF. Materials and methods Retrospective cohort study of a consecutive series of 605 patients with T1-4N0-3 HNSCC treated between 2008 and 2017 with primary (chemo)radiation and bilateral ENI. Results Median follow-up was 43 months (range 1.4–126). Three-year cumulative incidence of RF was 12.7%. Three-year cumulative incidences of ipsilateral RF (iRF) and cRF were 10.6% and 2.8%, respectively. All cRF occurred within the electively treated volume. Salvage treatment was possible in 65% and 59% of patients with iRF and cRF, respectively (p = 0.746). The 3-year overall survival rates after RF in patients with iRF and cRF were 27.4% and 41.2%, respectively (p = 0.713). Three-year cancer-specific survival rates were 31.6% and 48.1%, respectively (p = 0.634). In multivariate analysis, no significant predictive factors were identified for cRF after bilateral ENI. Conclusion Contralateral regional failure is rare, but still occurs in 2.8% of patients treated with bilateral ENI. The possibilities for salvage treatment, the rates of overall survival and cancer-specific survival were comparable to patients with iRF.
Collapse
Key Words
- Bilateral elective irradiation
- CSS, cancer specific survival
- CTV, clinical target volume
- Contralateral regional failure
- DM, distant metastasis
- ENI, elective nodal irradiation
- GTV, gross tumor volume
- HNSCC, head and neck squamous cell carcinoma
- HPV, human papilloma virus
- Head and neck cancer
- IMRT, intensity modulated radiotherapy
- LF, local failure
- OPC, oropharyngeal cancer
- OS, overall survival
- PTV, planning target volume
- RF, regional failure
- Unilateral elective irradiation
- VMAT, volumetric arc therapy
- cRF, contralateral regional failure
- iRF, ipsilateral regional failure
Collapse
Affiliation(s)
| | - Eric van Werkhoven
- Department of Biometrics, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Arash Navran
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Jan Paul de Boer
- Department of Medical Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Willem H Schreuder
- Department of Head and Neck Surgery, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Wouter V Vogel
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands.,Department of Nuclear Medicine, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Abrahim Al-Mamgani
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| |
Collapse
|
17
|
de Veij Mestdagh PD, Janssen T, Lamers E, Carbaat C, Hamming-Vrieze O, Vogel WV, Sonke JJ, Al-Mamgani A. SPECT/CT-guided elective nodal irradiation for head and neck cancer: Estimation of clinical benefits using NTCP models. Radiother Oncol 2019; 130:18-24. [DOI: 10.1016/j.radonc.2018.07.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 07/17/2018] [Accepted: 07/23/2018] [Indexed: 11/16/2022]
|