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Chai AWY, Yee SM, Lee HM, Abdul Aziz N, Yee PS, Marzuki M, Wong KW, Chiang AK, Chow LKY, Dai W, Liu TF, Tan LP, Khoo ASB, Lo KW, Lim PV, Rajadurai P, Lightfoot H, Barthorpe S, Garnett MJ, Cheong SC. Establishment and Characterization of an Epstein-Barr Virus-positive Cell Line from a Non-keratinizing Differentiated Primary Nasopharyngeal Carcinoma. CANCER RESEARCH COMMUNICATIONS 2024; 4:645-659. [PMID: 38358347 PMCID: PMC10911800 DOI: 10.1158/2767-9764.crc-23-0341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 11/02/2023] [Accepted: 01/26/2024] [Indexed: 02/16/2024]
Abstract
Nasopharyngeal carcinoma (NPC), a cancer that is etiologically associated with the Epstein-Barr virus (EBV), is endemic in Southern China and Southeast Asia. The scarcity of representative NPC cell lines owing to the frequent loss of EBV episomes following prolonged propagation and compromised authenticity of previous models underscores the critical need for new EBV-positive NPC models. Herein, we describe the establishment of a new EBV-positive NPC cell line, designated NPC268 from a primary non-keratinizing, differentiated NPC tissue. NPC268 can undergo productive lytic reactivation of EBV and is highly tumorigenic in immunodeficient mice. Whole-genome sequencing revealed close similarities with the tissue of origin, including large chromosomal rearrangements, while whole-genome bisulfite sequencing and RNA sequencing demonstrated a hypomethylated genome and enrichment in immune-related pathways, respectively. Drug screening of NPC268 together with six other NPC cell lines using 339 compounds, representing the largest high-throughput drug testing in NPC, revealed biomarkers associated with specific drug classes. NPC268 represents the first and only available EBV-positive non-keratinizing differentiated NPC model, and extensive genomic, methylomic, transcriptomic, and drug response data should facilitate research in EBV and NPC, where current models are limited. SIGNIFICANCE NPC268 is the first and only EBV-positive cell line derived from a primary non-keratinizing, differentiated nasopharyngeal carcinoma, an understudied but important subtype in Southeast Asian countries. This model adds to the limited number of authentic EBV-positive lines globally that will facilitate mechanistic studies and drug development for NPC.
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Affiliation(s)
| | - Shi Mun Yee
- Translational Cancer Biology Research Unit, Cancer Research Malaysia, Malaysia
| | - Hui Mei Lee
- Translational Cancer Biology Research Unit, Cancer Research Malaysia, Malaysia
| | - Norazlin Abdul Aziz
- Molecular Pathology Unit, Cancer Research Centre, Institute for Medical Research, Ministry of Health, Malaysia
- Faculty of Medicine, Universiti Teknologi MARA, Malaysia
| | - Pei San Yee
- Translational Cancer Biology Research Unit, Cancer Research Malaysia, Malaysia
| | - Marini Marzuki
- Molecular Pathology Unit, Cancer Research Centre, Institute for Medical Research, Ministry of Health, Malaysia
| | - Ka Wo Wong
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, P.R. China
| | - Alan K.S. Chiang
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, P.R. China
| | - Larry Ka-Yue Chow
- Department of Clinical Oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, P.R. China
| | - Wei Dai
- Department of Clinical Oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, P.R. China
| | - Teng Fei Liu
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, P.R. China
| | - Lu Ping Tan
- Molecular Pathology Unit, Cancer Research Centre, Institute for Medical Research, Ministry of Health, Malaysia
| | - Alan Soo Beng Khoo
- Molecular Pathology Unit, Cancer Research Centre, Institute for Medical Research, Ministry of Health, Malaysia
- Institute for Research, Development and Innovation and School of Postgraduate Studies, International Medical University, Bukit Jalil, Kuala Lumpur, Malaysia
- Department of Medical Oncology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Kwok Wai Lo
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong, P.R. China
| | | | - Pathmanathan Rajadurai
- Subang Jaya Medical Centre, Malaysia
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Malaysia
| | | | - Syd Barthorpe
- Wellcome Sanger Institute, Cambridge, United Kingdom
| | | | - Sok Ching Cheong
- Translational Cancer Biology Research Unit, Cancer Research Malaysia, Malaysia
- Department of Oral and Maxillofacial Clinical Sciences, Faculty of Dentistry, University of Malaya, Malaysia
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Yap LM, Jamalludin Z, Ng AH, Ung NM. A multi-center survey on adaptive radiation therapy for head and neck cancer in Malaysia. Phys Eng Sci Med 2023; 46:1331-1340. [PMID: 37470929 DOI: 10.1007/s13246-023-01303-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 07/12/2023] [Indexed: 07/21/2023]
Abstract
The survey is to assess the current state of adaptive radiation therapy (ART) for head and neck (H&N) cases among radiotherapy centers in Malaysia and to identify any implementation limitations. An online questionnaire was sent to all radiotherapy centers in Malaysia. The 24-question questionnaire consists of general information about the center, ART practices, and limitations faced in implementing ART. 28 out of 36 radiotherapy centers responded, resulting in an overall response rate of 78%. About 52% of the responding centers rescanned and replanned less than 5% of their H&N patients. The majority (88.9%) of the respondents reported the use Cone Beam Computed Tomography alone or in combination with other modalities to trigger the ART process. The main reasons cited for adopting ART were weight loss, changes in the immobilization fitting, and anatomical variation. The adaptation process typically occurred during week 3 or week 4 of treatment. More than half of the respondents require three days or more from re-simulation to starting a new treatment plan. Both target and organ at risk delineation on new planning CT relied heavily on manual delineation by physicians and physicists, respectively. All centers perform patient-specific quality assurance for their new adaptive plans. Two main limitations in implementing ART are "limited financial resources or equipment" and "limitation on technical knowledge". There is a need for a common consensus to standardize the practice of ART and address these limitations to improve the implementation of ART in Malaysia.
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Affiliation(s)
- Lai Mun Yap
- Clinical Oncology Unit, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
- Department of Radiotherapy, Aurelius Hospital Nilai, 71800, Nilai, Malaysia
| | - Zulaikha Jamalludin
- Clinical Oncology Unit, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Aik Hao Ng
- Clinical Oncology Unit, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Ngie Min Ung
- Clinical Oncology Unit, Faculty of Medicine, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
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Xiong J, Liu R, Zhang Y, Song W. Efficacy and safety of low concentration hydrogen peroxide as nasopharyngeal lavage fluid in the treatment for nasopharyngeal carcinoma radiotherapy: a pilot cohort study. J Cancer 2023; 14:927-934. [PMID: 37151395 PMCID: PMC10158515 DOI: 10.7150/jca.83189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 03/25/2023] [Indexed: 05/09/2023] Open
Abstract
Purpose: This study aimed to evaluate and analyze the efficacy and safety of low concentration (0.15%) hydrogen peroxide as nasopharyngeal lavage fluid in the treatment for nasopharyngeal carcinoma radiotherapy. Methods: Patients with nasopharyngeal carcinoma from Jiangxi cancer hospital were randomly divided into two cohorts. The training cohort (n= 50) received low concentration (0.15%) hydrogen peroxide as nasopharyngeal lavage fluid in the treatment for nasopharyngeal carcinoma radiotherapy, and the control cohort (n= 50) received 0.02% nitrofurazone lavage fluid. The primary endpoint of the study was result of short-term efficacy. Second endpoints were assessment of the linear visual analogue scale score and the incidences rate of nasopharyngeal radiation related toxicity. Results: All patients had completed the scheduled nasopharyngeal radiotherapy except two patients in control cohort. The complete response, partial response, stable disease and disease objective response of nasopharyngeal primary tumor observed in the training cohort included 18 cases, 23 cases, 9 cases and 41 cases respectively, while in the control cohort 20 cases, 25 cases, 5 cases and 45 cases were recorded, respectively. The study showed a significant discrepancy in the incidence rate of radiation-related mucosa damage between the two. Specifically, Grade 1 and 2 included 37 cases (74.0%) in the training cohort, while in the control cohort the cases were 20 (40.0%). Grade 3 and 4 damage however reported an incidence of 26.0% and 60%, respectively, which clearly constitutes a significant statistical difference (P = 0.002). The assessment of linear visual analogue scale showed that the patients self-conscious comfortable feeling in the training cohort were significantly higher than in the control cohort (P = 0.003). Conclusions: low concentration (0.15%) hydrogen peroxide as nasopharyngeal lavage fluid in the treatment for nasopharyngeal carcinoma patients is effective and safe, and can reduce nasopharyngeal local mucosa radiation related toxicity after radiotherapy.
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Affiliation(s)
- Juan Xiong
- Department of Radiation Oncology, Jiangxi Cancer Hospital, Nanchang City 330029, Jiangxi, China
| | - Rong Liu
- Department of Radiation Oncology, Jiangxi Cancer Hospital, Nanchang City 330029, Jiangxi, China
| | - Yuying Zhang
- Department of Radiation Oncology, Jiangxi Cancer Hospital, Nanchang City 330029, Jiangxi, China
| | - Wenting Song
- Department of Medical Oncology, Nanchang People's Hospital, The Third Hospital of Nanchang City, Nanchang City 330002, Jiangxi, China
- ✉ Corresponding author: Wenting Song ()
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Reffai A, Mesmoudi M, Derkaoui T, Ghailani Nourouti N, Barakat A, Sellal N, Mallick P, Bennani Mechita M. Epidemiological Profile and Clinicopathological, Therapeutic, and Prognostic Characteristics of Nasopharyngeal Carcinoma in Northern Morocco. Cancer Control 2021; 28:10732748211050587. [PMID: 34664512 PMCID: PMC8529313 DOI: 10.1177/10732748211050587] [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] [Indexed: 11/20/2022] Open
Abstract
Background Nasopharyngeal carcinoma is a multifactorial disease mainly affecting the
Asian and North African populations including Morocco. This study aimed to
determine the epidemiological profile of nasopharyngeal carcinoma in
Northern Morocco as well as its clinicopathological, therapeutic, and
prognostic characteristics. Methods 129 patients with nasopharyngeal carcinoma followed at the regional center of
oncology of Tangier in the period between April 2017 and July 2019, and
diagnosed elsewhere from March 2000 to February 2019, were included in this
study. Statistical analysis of the data was realized using Statistical
Package for the Social Sciences (SPSS) software. Results Nasopharyngeal carcinoma (NPC) represented 5% of all cases with a median age
of 50. The most affected age group was 40–54 years (41.1%). Of all patients,
65.9% were men and 34.1% were women with a sex ratio of 1.93 (Male/Female).
Undifferentiated nasopharyngeal carcinomas were the most common histological
type affecting 96.12% of patients. At diagnosis, the majority of patients
(82.2%) had an advanced stage of NPC (III, VIa, b, c) including 5.4% of
metastatic cases (IVc). Most cases (86%) had lymph node involvement with
cervical mass being the most common clinical presentation. 81.4% of patients
received radiotherapy combined with chemotherapy. Among these patients,
54.3% had concurrent radiochemotherapy preceded by induction chemotherapy.
The 5-year overall survival (OS) was 86.8% for all patients. It represented
91.3% for early stages, 87.9% for locally advanced stages, and 57.1% for the
metastatic stage significantly. The disease-free survival (DFS) at 5 years
was 87.6% knowing that relapse occurred in 16 cases. Conclusions Nasopharyngeal carcinoma is a particular disease with a late declaration. It
is common in Morocco as is the case in other endemic areas with a high
prevalence. Patients’ survival is significantly influenced by disease
staging.
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Affiliation(s)
- Ayman Reffai
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Science and Technology of Tangier (FSTT), 531748Abdelmalek Essaadi University (UAE), Tangier, Morocco
| | - Mohamed Mesmoudi
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Science and Technology of Tangier (FSTT), 531748Abdelmalek Essaadi University (UAE), Tangier, Morocco.,Ahmed Ben Zayed Al Nahyan Center of Cancer Treatment, Tangier, Morocco
| | - Touria Derkaoui
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Science and Technology of Tangier (FSTT), 531748Abdelmalek Essaadi University (UAE), Tangier, Morocco
| | - Naima Ghailani Nourouti
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Science and Technology of Tangier (FSTT), 531748Abdelmalek Essaadi University (UAE), Tangier, Morocco
| | - Amina Barakat
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Science and Technology of Tangier (FSTT), 531748Abdelmalek Essaadi University (UAE), Tangier, Morocco
| | - Nabila Sellal
- Ahmed Ben Zayed Al Nahyan Center of Cancer Treatment, Tangier, Morocco
| | - Parag Mallick
- Canary Center for Cancer Early Detection, School of Medicine, 10624Stanford University, Stanford, CA, USA
| | - Mohcine Bennani Mechita
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Science and Technology of Tangier (FSTT), 531748Abdelmalek Essaadi University (UAE), Tangier, Morocco
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Liao KC, Chuang HC, Chien CY, Lin YT, Tsai MH, Su YY, Yang CH, Lai CC, Huang TL, Li SH, Lee TF, Lin WT, Lee CH, Fang FM. Quality of Life as a Mediator between Cancer Stage and Long-Term Mortality in Nasopharyngeal Cancer Patients Treated with Intensity-Modulated Radiotherapy. Cancers (Basel) 2021; 13:cancers13205063. [PMID: 34680211 PMCID: PMC8533735 DOI: 10.3390/cancers13205063] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 11/24/2022] Open
Abstract
Simple Summary Even after the implementation of intensity-modulated radiotherapy (IMRT), nasopharyngeal cancer (NPC) survivors may continue to exhibit several physical symptoms that negatively affect long-term quality of life (QoL). An NPC patient cohort study (n = 682) was conducted to examine the potential mediating effect of QoL (evaluated at multiple treatment-related time points) on the cancer stage–mortality association. Patients with advanced NPC exhibited low global health QoL and high QoL-HN35 symptom pre-IMRT, 3 months post-IMRT, and 2 years post-IMRT. Global health QoL and QoL-HN35 symptom scores 2 years after IMRT explained 49.4% and 39.4% of the excessive effect of advanced NPC on mortality risk. Our findings indicate that global health QoL and QoL-HN35 symptom 2 years after IMRT are key mediators of the relationship between advanced NPC and high mortality. These findings emphasize the significance of QoL-HN35 symptom and global health QoL-associated medical support and care for patients with NPC who received IMRT. Abstract Background: Quality of life (QoL) attained before, during, or after treatments is recognized as a vital factor associated with therapeutic benefits in cancer patients. This nasopharyngeal cancer (NPC) patient longitudinal study assessed the relationship among QoL, cancer stage, and long-term mortality in patients with nasopharyngeal carcinoma (NPC) treated with intensity-modulated radiotherapy (IMRT). Patients and Methods: The European Organization for Research and Treatment of Cancer (EORTC) core QoL questionnaire (QLQ-C30) and the head and neck cancer-specific QoL questionnaire module (QLQ-HN35) were employed to evaluate four-dimensional QoL outcomes at five time points: pre- (n = 682), during (around 40 Gy) (n = 675), 3 months (n = 640), 1 year (n = 578) and 2 years post-IMRT (n = 505), respectively, for 682 newly diagnosed NPC patients treated between 2003 and 2017 at a single institute. The median followed-up time was 7.5 years, ranging from 0.3 to 16.1 years. Generalized estimating equations, multivariable proportional hazards models, and Baron and Kenny’s method were used to assess the investigated effects. Results: Advanced AJCC stage (III–IV) patients revealed a 2.26-fold (95% CI—1.56 to 3.27) higher covariate-adjusted mortality risk than early-stage (I–II) patients. Compared with during IMRT, advanced-stage patients had a significantly low global health QoL and a significantly high QoL-HN35 symptom by a large magnitude at pre-, 3 months, and 2 years post-IMRT. QoL scales at pre-IMRT, 1 year, and 2 years post-IMRT were significantly associated with mortality. The effect changes of mortality risk explained by global health QoL, QoL-C30, and QoL-HN35 symptom were 5.8–9.8% at pre-IMRT but at 2 years post-IMRT were 39.4–49.4% by global health QoL and QoL-HN35 symptoms. Conclusions: We concluded advanced cancer stage correlates with a long-term high mortality in NPC patients treated with IMRT and the association is partially intermediated by QoL at pre-IMRT and 2 years post-IMRT. Therefore, QoL-HN35 symptom and global health QoL-dependent medical support and care should be focused and tailored at 2 years post-IMRT.
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Affiliation(s)
- Kuan-Cho Liao
- Department of Radiation Oncology, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan;
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan
| | - Hui-Ching Chuang
- Department of Otolaryngologist, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan; (H.-C.C.); (C.-Y.C.); (Y.-T.L.); (M.-H.T.); (Y.-Y.S.); (C.-H.Y.); (C.-C.L.)
| | - Chih-Yen Chien
- Department of Otolaryngologist, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan; (H.-C.C.); (C.-Y.C.); (Y.-T.L.); (M.-H.T.); (Y.-Y.S.); (C.-H.Y.); (C.-C.L.)
| | - Yu-Tsai Lin
- Department of Otolaryngologist, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan; (H.-C.C.); (C.-Y.C.); (Y.-T.L.); (M.-H.T.); (Y.-Y.S.); (C.-H.Y.); (C.-C.L.)
| | - Ming-Hsien Tsai
- Department of Otolaryngologist, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan; (H.-C.C.); (C.-Y.C.); (Y.-T.L.); (M.-H.T.); (Y.-Y.S.); (C.-H.Y.); (C.-C.L.)
| | - Yan-Ye Su
- Department of Otolaryngologist, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan; (H.-C.C.); (C.-Y.C.); (Y.-T.L.); (M.-H.T.); (Y.-Y.S.); (C.-H.Y.); (C.-C.L.)
| | - Chao-Hui Yang
- Department of Otolaryngologist, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan; (H.-C.C.); (C.-Y.C.); (Y.-T.L.); (M.-H.T.); (Y.-Y.S.); (C.-H.Y.); (C.-C.L.)
| | - Chi-Chih Lai
- Department of Otolaryngologist, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan; (H.-C.C.); (C.-Y.C.); (Y.-T.L.); (M.-H.T.); (Y.-Y.S.); (C.-H.Y.); (C.-C.L.)
| | - Tai-Lin Huang
- Department of Hematology and Oncology, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan; (T.-L.H.); (S.-H.L.)
| | - Shau-Hsuan Li
- Department of Hematology and Oncology, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan; (T.-L.H.); (S.-H.L.)
| | - Tsair-Fwu Lee
- Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan;
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan
| | - Wei-Ting Lin
- Department of Social, Behavioral and Population Sciences, School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA 70112, USA;
| | - Chien-Hung Lee
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University, Kaohsiung 807378, Taiwan
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung 807378, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807378, Taiwan
- Office of Institutional Research & Planning, Secretariat, Kaohsiung Medical University, Kaohsiung 807378, Taiwan
- Correspondence: (C.-H.L.); (F.-M.F.); Tel.: +886-7-312-1101 (ext. 2314) (C.-H.L.); +886-7-731-7123 (ext. 7000) (F.-M.F.); Fax: +886-7-311-0811 (C.-H.L.); +886-7-398-6179 (F.-M.F.)
| | - Fu-Min Fang
- Department of Radiation Oncology, Kaohsiung Chang-Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833401, Taiwan;
- Department of Medicine, Chang Gung University College of Medicine, Taoyuan 333323, Taiwan
- Correspondence: (C.-H.L.); (F.-M.F.); Tel.: +886-7-312-1101 (ext. 2314) (C.-H.L.); +886-7-731-7123 (ext. 7000) (F.-M.F.); Fax: +886-7-311-0811 (C.-H.L.); +886-7-398-6179 (F.-M.F.)
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Development and validation of a normal tissue complication probability model for acquired nasal cavity stenosis and atresia after radical radiotherapy for nasopharyngeal carcinoma. Radiother Oncol 2021; 160:9-17. [PMID: 33839205 DOI: 10.1016/j.radonc.2021.03.040] [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: 10/28/2020] [Revised: 03/18/2021] [Accepted: 03/28/2021] [Indexed: 11/23/2022]
Abstract
PURPOSE Curative radiotherapy for nasopharyngeal carcinoma (NPC) can lead to acquired nasal cavity stenosis and atresia (ANCSA). As the first study to investigate risk factors of ANCSA in a large cohort of NPC patients, this article aims to develop and validate a multivariate normal tissue complication probability (NTCP) model to predict the development of ANCSA and to establish a nomogram for clinical use. METHODS AND MATERIALS The retrospective cohort was comprised of 548 NPC patients treated with radical radiotherapy. The cohort was randomly divided into training and validation groups. Least absolute shrinkage and selection operator regression was performed for variable selection from the clinical and dosimetric characteristics in the training group. A multivariate NTCP model and a nomogram were established for the prediction of ANCSA development. Discrimination and calibration were tested using receiver operating characteristic (ROC) curves and calibration tests, respectively, for both groups. RESULTS ANCSA was observed in 132 (24.1%) of 548 patients with NPC who underwent radical radiotherapy. The median time to ANCSA detection after treatment was 2.8 months (range, 0.0-57.7 months). Five potential predictors, including choanal invasion, low white blood cell count, high C-reactive protein level, high serum amyloid A level, and high V70Gy of the nasal cavity, were selected to develop the NTCP model based on 365 patients in the training group. The model had a fairly good discriminative power according to the ROC analysis in both the training (area under ROC curve = 0.79, 95%CI: 0.73-0.84) and validation (0.73, 0.64-0.82) groups. The calibration power was tested using the calibration test in the training (E-max = 0.069, E-avg = 0.015, p = 0.977) and validation (E-max = 0.057, E-avg = 0.032, p = 0.747) groups. CONCLUSIONS We developed and successfully validated an NTCP model for early prediction of ANCSA in patients with NPC after radical radiotherapy. This could help clinicians assess the risk of ANCSA before the initiation of follow-ups and ensure appropriate and timely management of this complication.
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