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Neoadjuvant chemoradiotherapy for oesophageal cancer: Primary tumour/lymph node regression inconsistency and prognostic value analysis 食管癌的新辅助放化疗:原发肿瘤/淋巴结消退不一致及预后价值分析
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-07-01 DOI: 10.1016/j.canrad.2025.104671
Zhang Xiaoyuan , Wang Yong , Yanbin Wang

Purpose

Tumour regression grade is an important prognostic indicator for patients undergoing neoadjuvant chemoradiotherapy. However, there is significant controversy regarding the prognostic implications when there is discordance between tumour regression grade in the primary tumour and lymph nodes. This study aims to clarify the impact of tumour regression grade discordance on prognosis for oesophageal cancer and identify potential causes for such discrepancies.

Material and method

A total of 112 patients with oesophageal squamous cell carcinoma who received neoadjuvant chemoradiotherapy followed by surgical treatment were included. Cox univariate analysis was performed to evaluate the relationship between primary tumour regression grade, lymph node regression grade, and both recurrence-free survival and overall survival. Logistic univariate analysis was employed to identify factors contributing to primary tumour and lymph node regression grade discordance.

Results

Primary tumour and lymph node regression grades, and nodal pathologic classification after preoperative therapy were significant factors influencing both recurrence-free and overall survival of patients with oesophageal cancer. Discordance between primary tumour and lymph node regression grades was observed in 38.4 % of cases. Factors such as radiotherapy modality (involved field or elective nodal irradiation), and the number of lymph nodes dissected were found to significantly affect the consistency between primary tumour and lymph node regression grades. When tumour regression grade discordance occurred, lymph node status had a more significant prognostic impact than the primary tumour.

Conclusion

Both primary tumour and lymph node regression grades are critical factors influencing recurrence-free survival. The number of lymph nodes dissected and the radiotherapy modality may contribute to discordance between the two indices. When discordance occurs, lymph node regression grade may hold more prognostic value than that of the primary tumour.
目的肿瘤消退分级是评价新辅助放化疗患者预后的重要指标。然而,当原发肿瘤和淋巴结的肿瘤消退级别不一致时,关于预后的影响存在重大争议。本研究旨在阐明肿瘤消退等级不一致对食管癌预后的影响,并找出造成这种不一致的潜在原因。材料与方法112例食管鳞状细胞癌患者行新辅助放化疗后手术治疗。采用Cox单因素分析来评估原发肿瘤消退分级、淋巴结消退分级、无复发生存期和总生存期之间的关系。采用Logistic单变量分析来确定导致原发肿瘤和淋巴结退化等级不一致的因素。结果食管癌患者术前治疗后原发肿瘤及淋巴结消退分级、淋巴结病理分型是影响患者无复发及总生存期的重要因素。在38.4%的病例中,原发肿瘤和淋巴结消退等级不一致。放疗方式(累及野区或选择性淋巴结照射)和淋巴结清扫数等因素对原发肿瘤和淋巴结消退分级的一致性有显著影响。当肿瘤消退级别不一致发生时,淋巴结状态比原发肿瘤有更显著的预后影响。结论原发肿瘤和淋巴结消退分级是影响无复发生存的关键因素。淋巴结清扫的数量和放疗方式可能导致这两个指标之间的不一致。当不一致发生时,淋巴结消退分级可能比原发肿瘤分级具有更大的预后价值。
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引用次数: 0
Observation of the efficacy and safety of concurrent intensity-modulated radiation with 5-fluorouracil and oxaliplatin for locally advanced nasopharyngeal carcinoma 调强放疗联合5-氟尿嘧啶和奥沙利铂治疗局部晚期鼻咽癌的疗效和安全性观察
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-07-01 DOI: 10.1016/j.canrad.2025.104668
Li Yanbing, Cai Lingyu, Zuo Hongbo, Li Zijun

Purpose

The purpose of this study was to investigate the clinical efficacy and safety of concurrent intensity-modulated radiotherapy in combination with 5-fluorouracil and oxaliplatin for patients diagnosed with locally advanced nasopharyngeal carcinoma.

Material and methods

A total 66 patients with a newly diagnosed and previously treated locally advanced nasopharyngeal carcinoma were enrolled in this study. The patients were divided into two groups: the control group receiving intensity-modulated radiotherapy with 5-fluorouracil and cisplatin (n = 33) and the observation group receiving intensity-modulated radiotherapy with 5-fluorouracil and oxaliplatin (n = 33). Short-term efficacy, 6-month survival rate, recurrence rate, and distant metastasis rate of tumours were compared between the two groups. Furthermore, the incidence of treatment-related adverse reactions including nausea and vomiting, thrombocytopenia, hepatorenal syndrome, peripheral neuritis, and oral mucosa reaction was recorded.

Results

The overall efficacy rate of short-term treatment in the observation group was 96.97 %, compared to 93.94 % in the control group, indicating no statistically significant difference (p > 0.05). There were no significant differences observed between the two groups in terms of 6-month survival rate, recurrence rate, and distant metastasis rate (p > 0.05). The incidence of adverse reactions during treatment was 21.21 % in the observation group, which was significantly lower than that of 45.45 % in the control group (p < 0.05).

Conclusion

Concurrent intensity-modulated radiation therapy with 5-fluorouracil and oxaliplatin may achieve similar short-term outcomes as the standard regimen of 5-fluorouracil and cisplatin in the treatment of locally advanced nasopharyngeal carcinoma, with the added benefit of reduced toxicity.
目的探讨5-氟尿嘧啶联合奥沙利铂同步调强放疗治疗局部晚期鼻咽癌的临床疗效和安全性。材料和方法本研究共纳入66例新诊断和既往治疗过的局部晚期鼻咽癌患者。将患者分为对照组(33例)和观察组(33例),对照组联合5-氟尿嘧啶顺铂调强放疗,观察组联合5-氟尿嘧啶和奥沙利铂调强放疗。比较两组患者的短期疗效、6个月生存率、复发率及肿瘤远处转移率。此外,还记录了治疗相关不良反应的发生率,包括恶心呕吐、血小板减少、肝肾综合征、周围神经炎和口腔黏膜反应。结果观察组短期治疗总有效率为96.97%,对照组为93.94%,差异无统计学意义(p >;0.05)。两组患者在6个月生存率、复发率和远处转移率方面无显著差异(p >;0.05)。观察组治疗过程中不良反应发生率为21.21%,显著低于对照组的45.45% (p <;0.05)。结论5-氟尿嘧啶联合奥沙利铂同步调强放疗治疗局部晚期鼻咽癌的短期疗效与5-氟尿嘧啶联合顺铂标准方案相似,且具有降低毒性的优点。
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引用次数: 0
Adaptive radiotherapy 自适应放射治疗
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-07-01 DOI: 10.1016/j.canrad.2025.104669
Philippe Maingon, Dr Antoine Mavrikios, Cyrus Chargari
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引用次数: 0
Evaluation of 30-day mortality after palliative radiotherapy of 8 Gy in a single fraction as a quality criteria of patient management in a university hospital 某大学医院作为病人管理质量标准的姑息性放疗后30天死亡率评价
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-07-01 DOI: 10.1016/j.canrad.2025.104670
Kevin Quintin, Jean-Marc Simon, Philippe Maingon, Mickaël Andraud, Alexandra Gabro, Julian Jacob, Cyrus Chargari

Purpose

Palliative radiotherapy aims to relieve cancer-related complications (pain, bleeding, external compression) and improve patients’ quality of life. The 8 Gy single-fraction regimen is the most commonly used, as it is effective and convenient to patients. Given that the therapeutic effect of palliative radiotherapy may take several weeks to manifest, a 30-day mortality rate below 16 % is considered a quality criteria, since a higher mortality rate would indicate overtreatment of patients who would not benefit from radiotherapy. Our objective was to determine the 30-day mortality rate following single-fraction 8 Gy palliative radiotherapy in the radiotherapy department of Pitié-Salpêtrière hospital (Paris, France) during the year 2023.

Material and method

We conducted a retrospective study including patients treated between January 2nd and December 31st, 2023, regardless of the primary cancer type or the indication for palliative radiotherapy. Mortality was assessed 30 days after radiotherapy. Factors associated with earlier death were analysed using univariate and multivariate analyses, including the following variables: primary cancer type, gender, 3–4 performance status (according to the World Health Organisation), number of systemic treatment lines received, radiotherapy indication, need for hospitalization, and multiple irradiation sites.

Results

A total of 125 patients were included in the study. Among them, 18 patients (14.4 %) received two treatments within the year, leading to a total of 143 radiation treatments delivered. Radiotherapy was primarily intended for pain relief in more than 86 % of cases (94 % for bone metastases, 6 % for epiduritis), while haemostatic and decompressive indications accounted for 3 % of cases each. In this cohort, the 30-day mortality rate was 11 %. However, in the subgroup of 11 patients treated with haemostatic intent, the 30-day mortality rate was significantly higher (46 %). A performance status greater than 2 was significantly associated with a higher 30-day mortality rate (odds ratio: 2.6, P < 0.01).

Conclusion

Our study estimates the 30-day mortality rate at 11 % following single-fraction 8 Gy palliative radiotherapy among the 125 patients treated for this indication at Pitié-Salpêtrière Hospital in 2023. This study demonstrates the feasibility of using this simple quality criteria as an indicator for internal or external audit evaluations.
目的姑息性放疗旨在缓解肿瘤相关并发症(疼痛、出血、外压),提高患者的生活质量。8gy单组分方案是最常用的,因为它对患者有效且方便。鉴于姑息性放疗的治疗效果可能需要数周才能显现,30天死亡率低于16%被认为是质量标准,因为较高的死亡率将表明对无法从放疗中获益的患者进行了过度治疗。我们的目标是确定2023年期间Pitié-Salpêtrière医院(法国巴黎)放疗部接受单次8 Gy姑息放疗后30天的死亡率。材料与方法我们对2023年1月2日至12月31日期间接受治疗的患者进行了回顾性研究,无论原发癌症类型或姑息性放疗的指征如何。放疗后30天评估死亡率。使用单变量和多变量分析分析与早期死亡相关的因素,包括以下变量:原发癌症类型、性别、3-4性能状态(根据世界卫生组织)、接受的全身治疗线数、放疗指征、住院需要和多个照射点。结果共纳入125例患者。其中18例(14.4%)患者在一年内接受了两次治疗,共进行了143次放射治疗。放疗主要用于缓解超过86%的病例的疼痛(94%用于骨转移,6%用于硬膜外炎),而止血和减压指征各占3%。在这个队列中,30天死亡率为11%。然而,在有止血意图的11例患者的亚组中,30天死亡率明显更高(46%)。性能状态大于2与较高的30天死亡率显著相关(优势比:2.6,P <;0.01)。结论:我们的研究估计,2023年在Pitié-Salpêtrière医院接受单次8 Gy姑息放疗的125例患者的30天死亡率为11%。本研究证明了使用这一简单的质量标准作为内部或外部审计评价指标的可行性。
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引用次数: 0
Prise en charge de la gynécomastie à l’ère des inhibiteurs des récepteurs aux androgènes chez les patients atteints de cancer de la prostate 前列腺癌患者雌激素受体抑制剂时代的妇科管理
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-06-24 DOI: 10.1016/j.canrad.2025.104665
Nassim Vibert , Vérane Achard , Pierre Pouvreau , Constance Huck , Jonathan Khalifa , Paul Sargos
This review aims to evaluate the incidence, clinical impact, and available therapeutic options for the management of gynecomastia induced by hormonal therapy, particularly in the era of androgen receptor pathway inhibitors, in patients with prostate cancer. We analysed data from clinical trials evaluating the incidence of gynecomastia under androgen receptor pathway inhibitors and the efficacy of both prophylactic and curative strategies, primarily tamoxifen and male breast radiotherapy, in patients receiving bicalutamide. Androgen receptor pathway inhibitors monotherapy is associated with high rates of gynecomastia (34 to 55 %), whereas combining androgen receptor pathway inhibitors with chemical castration significantly reduces this risk. Prophylactic tamoxifen significantly decreases gynecomastia incidence (down to 10 % versus 73 % without treatment) with good overall tolerance; prophylactic breast radiotherapy also shows efficacy. In the curative setting, tamoxifen appears more effective than radiotherapy, while surgery remains an invasive fallback option. However, extrapolating results obtained with bicalutamide to second-generation androgen receptor pathway inhibitors remains uncertain due to pharmacological and clinical differences. Gynecomastia could become a major complication of androgen receptor pathway inhibitors monotherapy. To date, tamoxifen and prophylactic breast radiotherapy are the most validated strategies, with the former appearing more effective. Further studies are needed to confirm their specific efficacy and safety in patients treated with androgen receptor pathway inhibitors.
本综述旨在评估激素治疗(特别是雄激素受体途径抑制剂时代)在前列腺癌患者中引起的男性乳房发育症的发生率、临床影响和可用的治疗选择。我们分析了来自临床试验的数据,评估了雄激素受体途径抑制剂治疗下男性乳房发育症的发生率,以及预防和治疗策略(主要是他莫昔芬和男性乳房放疗)在接受比卡鲁胺治疗的患者中的疗效。雄激素受体途径抑制剂单药治疗与男性乳房发育症的高发生率相关(34 - 55%),而雄激素受体途径抑制剂联合化学阉割可显著降低这一风险。预防性他莫昔芬可显著降低男性乳房发育症的发生率(降低至10%,而未经治疗的发生率为73%),总体耐受性良好;预防性乳房放射治疗也显示出疗效。在治疗方面,他莫昔芬似乎比放疗更有效,而手术仍然是一种侵入性的后备选择。然而,由于药理学和临床差异,将比卡鲁胺获得的结果外推到第二代雄激素受体途径抑制剂仍然不确定。男性乳房发育症可能成为雄激素受体途径抑制剂单药治疗的主要并发症。迄今为止,他莫昔芬和预防性乳房放射治疗是最有效的策略,前者似乎更有效。需要进一步的研究来证实它们在雄激素受体途径抑制剂治疗患者中的特异性疗效和安全性。
{"title":"Prise en charge de la gynécomastie à l’ère des inhibiteurs des récepteurs aux androgènes chez les patients atteints de cancer de la prostate","authors":"Nassim Vibert ,&nbsp;Vérane Achard ,&nbsp;Pierre Pouvreau ,&nbsp;Constance Huck ,&nbsp;Jonathan Khalifa ,&nbsp;Paul Sargos","doi":"10.1016/j.canrad.2025.104665","DOIUrl":"10.1016/j.canrad.2025.104665","url":null,"abstract":"<div><div>This review aims to evaluate the incidence, clinical impact, and available therapeutic options for the management of gynecomastia induced by hormonal therapy, particularly in the era of androgen receptor pathway inhibitors, in patients with prostate cancer. We analysed data from clinical trials evaluating the incidence of gynecomastia under androgen receptor pathway inhibitors and the efficacy of both prophylactic and curative strategies, primarily tamoxifen and male breast radiotherapy, in patients receiving bicalutamide. Androgen receptor pathway inhibitors monotherapy is associated with high rates of gynecomastia (34 to 55 %), whereas combining androgen receptor pathway inhibitors with chemical castration significantly reduces this risk. Prophylactic tamoxifen significantly decreases gynecomastia incidence (down to 10 % versus 73 % without treatment) with good overall tolerance; prophylactic breast radiotherapy also shows efficacy. In the curative setting, tamoxifen appears more effective than radiotherapy, while surgery remains an invasive fallback option. However, extrapolating results obtained with bicalutamide to second-generation androgen receptor pathway inhibitors remains uncertain due to pharmacological and clinical differences. Gynecomastia could become a major complication of androgen receptor pathway inhibitors monotherapy. To date, tamoxifen and prophylactic breast radiotherapy are the most validated strategies, with the former appearing more effective. Further studies are needed to confirm their specific efficacy and safety in patients treated with androgen receptor pathway inhibitors.</div></div>","PeriodicalId":9504,"journal":{"name":"Cancer Radiotherapie","volume":"29 4","pages":"Article 104665"},"PeriodicalIF":1.5,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144365583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Failure patterns analysis of three-dimensional radiotherapy for stage IV non-small cell lung cancer primary tumours IV期非小细胞肺癌原发肿瘤三维放疗失败模式分析
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-06-24 DOI: 10.1016/j.canrad.2025.104667
Wei Zhang, Xin Yu Wu, Jie Liu, Wen Gang Yang, Xia Xia Chen, Bing Lu

Purpose

The purpose of this study was to investigate the failure patterns of three-dimensional radiotherapy of primary tumours combined with first-line systemic therapy and the influence of radiotherapy-related factors for stage IV non-small cell lung cancer.

Material and methods

Seven hundred and forty-eight cases with the initial diagnosis of stage IV non-small cell lung cancer that met the inclusion criteria were selected from 1509 cases registered from March 2003 to July 2021 for univariate analysis and failure patterns test using the chi-square test. Kaplan-Meier survival analysis was performed with the log-rank test and Cox regression model for multifactor prognostic analysis. A value of P below 0.05 indicated a statistically significant difference.

Results

The failure incidence of first-line treatment was 72.3 % in 748 cases and 33.6 % within 6 months, 38.8 % between 6 and 12 months, 19.4 % between 12 and 24 months and 8.1 % after 24 months. A significant difference was observed in the median survival time, which was 7.2, 13.4, 22.2, and 37.6 months (χ2 = 324.580, p < 0.000), respectively. The incidence of recurrent failure was 20.4 %. A decrease was observed in the recurrence rate with the increasing dose of radiotherapy to the primary tumour, and no significant difference in the incidence of recurrent failure was observed between oligometastatic and non-oligometastatic tumours. The incidence of metastatic failure was 89.4 %, with the order of incidence as follows (from highest to lowest): brain, bone, lung, liver, pleural cavity, distant lymph nodes, adrenal gland, other body parts. The incidence of additional metastases was approximately 50 %, and the progression of synchronous metastases concerned approximately one third of the cases. The metastatic status, time of treatment failure, pathology type, gender, and at least 63 Gy during the same period of four to six cycles of chemotherapy were independent factors in the prediction of prognosis.

Conclusion

The failure patterns of radiotherapy for primary tumours in stage IV non-small cell lung cancer was different from that of first-line systemic therapy alone, with significantly lower local failure, predominant metastatic failure, and the highest incidence of brain metastases. The later treatment failure occurs, the longer will be the oligometastatic status. Oligometastatic cancer, female sex, non-squamous cell carcinoma, the late occurrence of treatment failure, and at least 63 Gy concurrent four to six cycles of chemotherapy were independent prognostic factors for prolonged survival.
目的探讨原发性肿瘤三维放疗联合一线全身治疗对IV期非小细胞肺癌的失败模式及放疗相关因素的影响。材料和方法从2003年3月至2021年7月登记的1509例初始诊断为IV期非小细胞肺癌的病例中选择748例符合纳入标准的病例,采用卡方检验进行单因素分析和失效模式检验。Kaplan-Meier生存分析采用log-rank检验和Cox回归模型进行多因素预后分析。P < 0.05为差异有统计学意义。结果748例患者中,一线治疗失败率为72.3%,6个月内失败率为33.6%,6 ~ 12个月失败率为38.8%,12 ~ 24个月失败率为19.4%,24个月后失败率为8.1%。中位生存时间分别为7.2、13.4、22.2、37.6个月(χ2 = 324.580, p <;分别为0.000)。复发失败率为20.4%。随着原发肿瘤放射治疗剂量的增加,复发率下降,并且在复发失败发生率方面,在少转移性和非少转移性肿瘤之间没有显著差异。转移失败发生率为89.4%,发生率从高到低依次为:脑、骨、肺、肝、胸膜腔、远处淋巴结、肾上腺、其他身体部位。附加转移的发生率约为50%,同步转移的进展约占三分之一。转移情况、治疗失败时间、病理类型、性别、4 ~ 6个化疗周期内至少63 Gy是预测预后的独立因素。结论IV期非小细胞肺癌原发肿瘤放疗的失败模式与一线全身治疗不同,局部失败明显较低,以转移性失败为主,脑转移发生率最高。治疗失败越晚,低转移状态持续时间越长。少转移癌、女性、非鳞状细胞癌、晚期治疗失败、至少63 Gy同时4 - 6个化疗周期是延长生存期的独立预后因素。
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引用次数: 0
Comparison of static and dynamic intensity-modulated radiotherapy for nasopharyngeal carcinoma: Dosimetric and normal tissue complication probability analysis 鼻咽癌静态与动态调强放疗的比较:剂量学及正常组织并发症概率分析
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-06-23 DOI: 10.1016/j.canrad.2025.104645
Oumaima Mendessi , Bilel Daoud , Omar Nouri , Wafa Mnejja , Tarek Sahnoun , Jamel Daoud , Leila Farhat

Purpose

With the advancement of radiotherapy techniques for nasopharyngeal carcinoma, it is essential to evaluate the comparative effectiveness of volumetric-modulated arc therapy and intensity-modulated radiotherapy. This study aimed to evaluate the dosimetric and radiobiological differences between the two techniques for the treatment of nasopharyngeal carcinomas.

Materials and methods

This retrospective study involved replanning of 125 cases of nasopharyngeal carcinoma using both intensity-modulated radiotherapy and volumetric-modulated arc therapy techniques. Dosimetric evaluation was performed using dose–volume histogram parameters, while radiobiological analysis was conducted using normal tissue complication probability models. Target coverage (dose delivered to 95 % of the high-risk planning target volume), mean dose, and maximum dose to organs at risk, as well as normal tissue complication probability values, were compared between the two techniques.

Results

Both intensity-modulated radiotherapy and volumetric-modulated arc therapy provided comparable dosimetric outcomes. Volumetric-modulated arc therapy showed advantages in certain parameters, with a higher dose delivered to 95 % of the high-risk planning target volume and lower maximum dose for the right and left optic nerves, chiasma, and lenses. Conversely, intensity-modulated radiotherapy provided better sparing of the parotid glands, resulting in lower normal tissue complication probability values. The larynx, pharynx, and thyroid also received lower mean doses with intensity-modulated radiotherapy. The results remained consistent in subgroups of both early and advanced stages of nasopharyngeal carcinoma.

Conclusion

Intensity-modulated radiotherapy and volumetric-modulated arc therapy both have distinct advantages in treating nasopharyngeal carcinoma. Organs at risk protected vary between the two techniques. The radiobiological parameters, including normal tissue complication probability models and dosimetric measures, highlight the differential benefits of each technique.
目的随着鼻咽癌放疗技术的进步,有必要对体积调弧治疗与调强放疗的疗效进行比较。本研究旨在评估两种技术治疗鼻咽癌的剂量学和放射生物学差异。材料与方法回顾性研究125例鼻咽癌患者的调强放疗和调容弧线治疗方案。剂量学评价采用剂量-体积直方图参数,放射生物学分析采用正常组织并发症概率模型。比较两种技术的靶覆盖率(达到高危计划靶体积95%的剂量)、危及器官的平均剂量和最大剂量以及正常组织并发症的概率值。结果调强放疗和调容弧线治疗的剂量学结果相当。体积调制弧线治疗在某些参数上具有优势,较高的剂量可达到95%的高危计划目标体积,而对左右视神经、交叉和晶状体的最大剂量较低。相反,调强放疗能更好地保留腮腺,导致较低的正常组织并发症概率值。调强放疗对喉部、咽部和甲状腺的平均剂量也较低。结果在鼻咽癌早期和晚期亚组中保持一致。结论调强放疗与调容弧线治疗在鼻咽癌治疗中均有明显优势。两种技术保护的危险器官各不相同。放射生物学参数,包括正常组织并发症概率模型和剂量测量,突出了每种技术的不同益处。
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引用次数: 0
First experiences with an adaptive pelvic radiotherapy system: Analysis of treatment times and learning curve 首次使用适应性盆腔放疗系统的经验:治疗时间和学习曲线的分析
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-06-16 DOI: 10.1016/j.canrad.2025.104647
David Benzaquen , Daniel Taussky , Vincent Fave , Jarno Bouveret , Farid Lamine , Gladys Letenneur , Amandine Halley , Yusuf Solmaz , Ambroise Champion

Purpose

The Varian Ethos system allows not only on-treatment-table plan adaptation but also automated contouring with the aid of artificial intelligence. This study evaluates the initial clinical implementation of an adaptive pelvic radiotherapy system, focusing on the treatment times and the associated learning curve.

Material and methods

We analyzed the data from 903 consecutive treatments for most urogenital cancers at our center. The treatment time was calculated from the time of the first cone-beam computed tomography scan used for replanning until the end of treatment. To calculate whether treatments were generally shorter over time, we divided the date of the first treatment into 3-months quartiles. Differences between the groups were calculated using t-tests.

Results

The mean time from the first cone-beam computed tomography scan to the end of treatment was 25.9 min (standard deviation: 6.9 min). Treatment time depended on the number of planning target volumes and treatment of the pelvic lymph nodes. The mean time from cone-beam computed tomography to the end of treatment was 37 % longer if the pelvic lymph nodes were treated and 26 % longer if there were more than two planning target volumes. There was a learning curve: in linear regression analysis, both quartiles of months of treatment (odds ratio [OR]: 1.3, 95 % confidence interval [CI]: 1.8–0.70, P < 0.001) and the number of planning target volumes (OR: 3.0, 95 % CI: 2.6–3.4, P < 0.001) were predictive of treatment time.

Conclusion

Approximately two-thirds of the treatments were delivered within 33 min. Treatment time was strongly dependent on the number of separate planning target volumes. There was a continuous learning curve.
瓦里安Ethos系统不仅可以在治疗台上调整计划,还可以在人工智能的帮助下实现自动轮廓。本研究评估了适应性骨盆放疗系统的初步临床实施,重点关注治疗时间和相关的学习曲线。材料和方法我们分析了本中心903例连续治疗的大多数泌尿生殖系统癌的数据。治疗时间从用于重新规划的第一次锥形束计算机断层扫描时间计算到治疗结束。为了计算治疗是否随着时间的推移而普遍缩短,我们将第一次治疗的日期分为3个月的四分位数。使用t检验计算组间差异。结果从首次锥形束ct扫描到治疗结束的平均时间为25.9 min(标准差为6.9 min)。治疗时间取决于计划靶体积的数量和盆腔淋巴结的治疗。如果盆腔淋巴结得到治疗,从锥束计算机断层扫描到治疗结束的平均时间要长37%,如果有两个以上的计划靶体积,则要长26%。有一条学习曲线:在线性回归分析中,治疗月份的两个四分位数(优势比[OR]: 1.3, 95%可信区间[CI]: 1.8-0.70, P <;0.001)和计划目标卷数量(OR: 3.0, 95% CI: 2.6-3.4, P <;0.001)预测治疗时间。结论约三分之二的治疗在33 min内完成,治疗时间与单独计划靶体积的数量密切相关。这是一个持续的学习曲线。
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引用次数: 0
Qualitative evaluation of automatic liver segmentation in computed tomography images for clinical use in radiation therapy 放射治疗中计算机断层图像自动肝脏分割的定性评价
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-06-14 DOI: 10.1016/j.canrad.2025.104648
Dorea Maria Khalal , Souleyman Slimani , Zine Eddine Bouraoui , Hacene Azizi

Purpose

Segmentation of target volumes and organs at risk on computed tomography (CT) images constitutes an important step in the radiotherapy workflow. Artificial intelligence-based methods have significantly improved organ segmentation in medical images. Automatic segmentations are frequently evaluated using geometric metrics. Before a clinical implementation in the radiotherapy workflow, automatic segmentations must also be evaluated by clinicians. The aim of this study was to investigate the correlation between geometric metrics used for segmentation evaluation and the assessment performed by clinicians.

Materials and Methods

In this study, we used the U-Net model to segment the liver in CT images from a publicly available dataset. The model's performance was evaluated using two geometric metrics: the Dice similarity coefficient and the Hausdorff distance. Additionally, a qualitative evaluation was performed by clinicians who reviewed the automatic segmentations to rate their clinical acceptability for use in the radiotherapy workflow. The correlation between the geometric metrics and the clinicians’ evaluations was studied.

Results

The results showed that while the Dice coefficient and Hausdorff distance are reliable indicators of segmentation accuracy, they do not always align with clinician segmentation. In some cases, segmentations with high Dice scores still required clinician corrections before clinical use in the radiotherapy workflow.

Conclusion

This study highlights the need for more comprehensive evaluation metrics beyond geometric measures to assess the clinical acceptability of artificial intelligence-based segmentation. Although the deep learning model provided promising segmentation results, the present study shows that standardized validation methodologies are crucial for ensuring the clinical viability of automatic segmentation systems.
目的计算机断层扫描(CT)图像中靶体积和危险器官的分割是放疗工作流程中的重要步骤。基于人工智能的方法显著改善了医学图像中的器官分割。自动分割通常使用几何度量来评估。在放疗工作流程的临床实施之前,自动分割也必须由临床医生进行评估。本研究的目的是调查用于分割评估的几何指标与临床医生进行的评估之间的相关性。材料和方法在本研究中,我们使用U-Net模型从公开可用的数据集中分割CT图像中的肝脏。模型的性能用两个几何指标来评估:Dice相似系数和Hausdorff距离。此外,临床医生对自动分割进行了定性评估,以评估其在放疗工作流程中使用的临床可接受性。研究几何指标与临床医师评价的相关性。结果Dice系数和Hausdorff距离是分割精度的可靠指标,但并不总是与临床医生的分割一致。在某些情况下,高Dice分数的分割仍然需要临床医生在临床使用放射治疗工作流程之前进行校正。结论本研究强调了在几何测量之外需要更全面的评估指标来评估基于人工智能的分割的临床可接受性。尽管深度学习模型提供了有希望的分割结果,但目前的研究表明,标准化的验证方法对于确保自动分割系统的临床可行性至关重要。
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引用次数: 0
First case report of radiation-recall myositis following trabectedin in patient with stage IV mesenchymal chondrosarcoma IV期间充质软骨肉瘤患者放射回忆性肌炎的第一例报道
IF 1.5 4区 医学 Q4 ONCOLOGY Pub Date : 2025-06-14 DOI: 10.1016/j.canrad.2025.104646
Chiara Casale, Marie-Pierre Sunyach, Salvatore Cozzi, Camille Roukoz
Radiation recall is a rare phenomenon in which inflammation ensues on a previously irradiated tissue after the administration of a precipitating systemic agent. This reaction may appear anytime between weeks to years after radiotherapy, and it can be caused by a variety of drugs (mainly cytotoxic agents). Skin is the most commonly involved organ and despite the poor insight regarding the pathophysiology of this phenomenon, many case reports have been published on radiation recall dermatitis. In one third of cases, however, radiation recall occurs within internal organs or subcutaneous tissues. Radiation recall myositis is a rare example of this, which has most frequently been reported after the administration of gemcitabine in oncologic patients. We report a case of trabectedin-induced radiation recall myositis occurring 5 months after stereotactic body radiation therapy on a metastatic muscle lesion in a patient with stage IV mesenchymal chondrosarcoma. To our knowledge, this is the first published case of trabectedin-induced radiation recall myositis.
辐射回忆是一种罕见的现象,在先前受辐照的组织在接受系统性沉淀剂后发生炎症。这种反应可能在放射治疗后几周到几年的任何时间出现,并且可能由多种药物(主要是细胞毒性药物)引起。皮肤是最常见的受累器官,尽管对这一现象的病理生理学知之甚少,但许多关于辐射回忆性皮炎的病例报告已经发表。然而,在三分之一的病例中,辐射回忆发生在内脏或皮下组织内。放射回忆性肌炎是一个罕见的例子,它在肿瘤患者使用吉西他滨后最常被报道。我们报告一例四期间充质软骨肉瘤患者的转移性肌肉病变在立体定向体放射治疗后5个月发生的小梁蛋白诱导的放射回忆性肌炎。据我们所知,这是第一例发表的小链蛋白引起的辐射回忆性肌炎病例。
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引用次数: 0
期刊
Cancer Radiotherapie
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