Palliative Radiotherapy Research Articles

Transforming Lung Cancer Management: A Promising Case Study of Immune Checkpoint Inhibitor Success Following a Multidisciplinary Approach

A 54-year-old female patient diagnosed with Stage IIIb squamous cell carcinoma (cT2aN3M0) initially received chemoradiotherapy. Two years after initial treatment, cancer relapse led to the administration of nivolumab, which was halted due to the development of drug-induced pneumonitis. Subsequent management with prednisolone and eight different cytotoxic agents failed to prevent metastasis to the cervical lymph nodes. The tumor’s programmed death-ligand 1 (PD-L1) expression rate was recorded at 10%. Four years after her diagnosis, the patient received a ninth-line therapy combining cisplatin, gemcitabine, and necitumumab, followed by palliative neck radiation due to increasing lymph node size. Remarkable tumor regression occurred three months after introducing atezolizumab as the tenth-line treatment, suggesting that previous treatments, particularly radiotherapy and cisplatin, might have enhanced PD-L1 expression, aligning with the existing literature. This case highlights the urgent need for further research to elucidate the intricate interplay between treatment history and PD-L1 expression in squamous cell carcinoma, emphasizing the importance of accumulating case studies to inform therapeutic strategies.

Development of brain metastases in patients managed with non-curative thoracic radiotherapy for stage II/III non-small cell lung cancer

BackgroundThis retrospective study analyzed the incidence of subsequent brain metastases after palliative radiotherapy or chemoradiation in patients with stage II/III non-small cell lung cancer (NSCLC). Risk factors for brain metastases development and survival after diagnosis were evaluated.MethodsDifferent baseline parameters including but not limited to age, stage and target volume size were assessed. Outcomes were abstracted from electronic health records. Uni- and multivariate tests were performed.ResultsThe study included 102 patients and found an actuarial risk of brain metastases of 15% (standard error ± 4) at one year and 20% (± 5) at two years. The maximum time interval was 15 months from start of radiation treatment. A non-significant survival difference was observed (median 12 months without versus 8.3 months with brain metastases, p = 0.21). Incidence was higher in patients with N2/3 stage, larger planning target volume size, and younger age (univariately significant factors). Trends were seen for stage III and adenocarcinoma histology. The multivariate analysis confirmed age as the most important risk factor.ConclusionThe risk of brain metastases development was comparable to that reported in studies of curative chemoradiation. All events occurred within 15 months of follow-up, suggesting that long-term surveillance imaging may not be warranted. Patients younger than 60 years had a very high risk of brain metastases development.

Survival Outcomes of Metastatic or Recurrent Cervical Cancer Patients Treated with Palliative Intent Chemotherapy: Real-World Data

ObjectiveTo analyse the outcomes of metastatic or recurrent cervical cancer patients treated with palliative intent chemotherapy, as data on their outcomes are scant from LMIC.MethodsIn this retrospective analysis, 302 upfront metastatic or recurrent cervical cancer patients were treated with palliative intent from 1 January 2015 till 31 March 2020. The demographics, palliative therapy details, progression-free survival (PFS) and overall—survival (OS) were analysed for those receiving chemotherapy.ResultsThe median age was 53 (IQR 48-61) years and 248, (82.0 %) patients belonged to low-socioeconomic strata. Most common histology was squamous cell carcinoma (SCC) in 263 (87.1%) patients. De novo metastatic disease was seen in 119 (39.4 %) and recurrence post-treatment was seen in 183 (60.6 %) patients. Among the 302 patients, 149 (49.3%) patients received palliative chemotherapy, 70 (23.2 %) received palliative radiotherapy and 83 (27.5%) patients were considered for palliative care alone. The most common regimen was paclitaxel and carboplatin in 124 (83.2 %) patients. Eighty (53.7 %) patients completed 6 cycles. Four (2.7 %) received bevacizumab with chemotherapy in the first line and 3 (2.0%) patients received pembrolizumab in second line. The median PFS was 8.5 months (95% CI: 7.12–9.89 months) and median OS was 13.0 months (95% CI: 11.10–14.98 months) with median duration of follow-up of 33.4 months (range 27.9–38.9 months).ConclusionsIn real-world scenario, only half of the metastatic or recurrent cervical patients received any palliative chemotherapy. Paclitaxel and carboplatin are an effective regimen, and there was limited access to targeted therapy and immunotherapy.

Tracheal Tumors: Clinical Practice Guidelines for Palliative Treatment and Follow-Up.

A substantial portion of patients with advanced cancer cannot be cured, regardless of the therapeutic methods employed. Hence, rational palliative causal treatment becomes crucial. Representative studies specifically addressing the exclusive palliative treatment of patients diagnosed with tracheal cancers have not been identified. In most studies, patients treated palliatively constituted a subset of the overall evaluated group. A thorough literature review was conducted, focusing on three types of palliative treatment: palliative radiotherapy, palliative surgical procedures, and systemic treatment for advanced disease. This review uniquely fills a significant gap in the existing literature by providing the first comprehensive and updated clinical practice guidelines specifically focused on the palliative treatment of tracheal tumors. The proposed guidelines emphasize the unique clinical challenges and treatment strategies pertinent to palliative care in tracheal tumors, which are not adequately covered in existing guidelines for other thoracic malignancies.

Surgical indication and management of obstructive colonic metastasis from primary lung adenocarcinoma: report of a case and review of the literature

BackgroundColonic metastasis from lung cancer is very rare and is typically associated with poor prognosis. Herein, we report the case of a patient who achieved intermediate-term survival using a multimodal treatment approach, including chemotherapy, immunotherapy, radiotherapy, and surgical resection for obstructive colonic metastasis from primary lung adenocarcinoma.Case presentationA woman in her 50s presented with anemia and a positive fecal occult blood test. Computed tomography revealed a tumor in the right upper lobe of the lung with mediastinal lymphadenopathy and wall thickening in the transverse colon. Colonoscopy revealed a stricture involving 50% of the colonic lumen. Biopsy revealed a poorly differentiated adenocarcinoma positive for CK-7 and TTF-1, very focally positive for napsin A, and negative for CK-20 and CDX-2. Furthermore, positron emission tomography/CT (PET/CT) showed a high maximum standardized uptake value (SUVmax) of 8.2 in the iliac bone. Based on these findings, the patient was diagnosed with primary lung adenocarcinoma with simultaneous metastasis to the transverse colon and iliac bone (cT4N3M1c, cStage IVB).After receiving first-line chemotherapy with atezolizumab, pemetrexed, and carboplatin, the tumors shrank after 4 courses. Subsequently, the patient received maintenance therapy with atezolizumab and pemetrexed. However, the tumor enlarged after 10 courses. Second-line chemotherapy with docetaxel and ramucirumab (3 courses) failed to achieve tumor reduction. Colonoscopy revealed an impassable colonic tumor. Nineteen months after diagnosis, surgery was planned for imminent intestinal obstruction.We determined that the colonic tumor was resectable, because laparoscopic exploration revealed no other metastases. The tumor was resected by partial colectomy with ileocolonic anastomosis. The postoperative course was uneventful. Pathological examination revealed a resection margin that was negative for malignancy, and the histological type was consistent with metastatic lung adenocarcinoma.The patient then received nab-paclitaxel therapy; however, she developed symptoms of superior vena cava syndrome after 3 courses. The patient received palliative irradiation (30 Gy/10 fr) followed by nivolumab. She soon developed a solitary brain metastasis, and stereotactic irradiation was planned. After 3 courses of nivolumab, the metastasis was reduced significantly, and stereotactic brain irradiation was canceled. The lung tumor and mediastinal lymphadenopathy gradually shrank, and the patient survived for 13 months after surgery without disease progression.ConclusionsIn this case, surgical resection of colonic metastasis from primary lung adenocarcinoma may have contributed to the short-term prognosis as a bridge-to-next available multimodal treatment.

EP502 - Outcome of 5 years of endoscopic oesophageal stenting: a retrospective analysis

Abstract Background Oesophageal endoscopic stenting has a wide range of indications however dysphagia and use in cancer of the oesophagus is by far the most common, being the 14th most common cancer in the UK, despite advances in diagnosis and therapy with patients often presenting at advanced stages of the disease. Greater than 50% of presentations are at an advanced stage of disease where resection is often not possible and palliation is required. Palliation often is a potential combination of palliative chemotherapy, radiotherapy and endoscopic stenting to control the disease burden and improve symptoms. One of the most limiting palliative symptoms is dysphagia for which oesophageal stenting has become the standard of treatment showing immediate results. However, intra/post procedural complication rates can be high leading to: oesophageal perforation, mediastinitis, aspiration pneumonia, failed stent insertion or slippage. Method A retrospective analysis of 97 patients who underwent oesophageal stenting, in a 5 year time period between 2018-2023 in the Dumfries Royal Infirmary, a large district general hospital. Patients electronic notes were retrospectively analysed for patient characteristics, indication for stenting, early complications, successful hospital discharge and mortality. Conclusion The retrospective study demonstrated oesophageal stenting is a relatively safe procedure with a low mortality and the majority of patients being discharged from hospital. However, complications are not uncommon and patients should be properly counselled; on the risks, benefits and also food habits to prevent bolus.

Palliative radiotherapy versus best supportive care in patients with painful hepatic cancer (CCTG HE1): a multicentre, open-label, randomised, controlled, phase 3 study

Palliative treatment options for painful hepatic cancer can be restricted due to patients eventually becoming refractory to standard treatment. The aim of this study was to determine whether radiotherapy improves hepatic pain from cancer. In this open-label, randomised, controlled, phase 3 trial (CCTG HE1) done in nine cancer centres across Canada, we included patients aged 18 years or older with hepatocellular carcinoma or liver metastases, who were refractory to standard treatment, with an Eastern Cooperative Oncology Group performance status of 0-3, with life expectancy of more than 3 months, and pain or discomfort at its worst in the past 24 hours on the Brief Pain Inventory (BPI) of at least 4 out of 10, which was stable for up to 7 days before randomisation. Patients were randomly assigned (1:1), via a minimisation method after stratification by centre and type of cancer (hepatocellular carcinoma vs liver metastases), to single-fraction radiotherapy (8 Gy) to the liver with 8 mg ondansetron (or equivalent) orally and 4 mg dexamethasone orally given 1-2 h before radiotherapy plus best supportive care (including non-opioid or opioid analgesia, or dexamethasone, or a combination of these) or best supportive care alone. The primary endpoint was improvement in patient-reported liver cancer pain or discomfort of at least 2 points on worst pain intensity on the BPI at 1 month after randomisation. All patients with both baseline and 1-month assessments were included in the primary endpoint analysis. Safety was assessed in all patients randomly assigned to treatment. This trial is registered with ClinicalTrials.gov, NCT02511522, and is complete. Between July 25, 2015, and June 2, 2022, 66 patients were screened and randomly assigned to radiotherapy plus best supportive care (n=33) or best supportive care (n=33). Median age was 65 years (IQR 57-72), 37 (56%) of 66 patients were male, 29 (44%) were female, 43 (65%) had liver metastases, and 23 (35%) had hepatocellular carcinoma (data on race and ethnicity were not collected). As of data cutoff (Sept 8, 2022), median follow-up was 3·2 months (95% CI 3·0-3·4). 24 (73%) of 33 in the radiotherapy plus best supportive care group and 18 (55%) of 33 in the best supportive care only group completed baseline and 1-month assessments. An improvement in hepatic pain of at least 2 points in worst pain intensity on the BPI at 1 month was seen in 16 (67%) of 24 patients in the radiotherapy plus best supportive care group versus four (22%) of 18 patients in the best supportive care group (p=0·0042). The most common grade 3-4 adverse events within 1 month after randomisation were abdominal pain (three [9%] of 33 in the radiotherapy group vs one [3%] of 33 in best supportive care group) and ascites (two [6%] vs one [3%]). No serious adverse events or treatment-related deaths were observed. Single-fraction radiotherapy plus best supportive care improved pain compared with best supportive care alone in patients with liver cancer, and could be considered a standard palliative treatment. Canadian Cancer Society.

Real-World Implementation of Simulation-Free Radiation Therapy (SFRT-1000): A Propensity Score-Matched Analysis of 1000 Consecutive Palliative Courses Delivered in Routine Care.

The feasibility of simulation-free radiation therapy (SFRT) has been demonstrated but information regarding its routine care impact and scalability is lacking. In this single-institution, retrospective cohort study, all patients receiving palliative radiation therapy at an Australian tertiary cancer center were eligible for consideration of SFRT unless mask immobilization, a stereotactic technique, or a definitive dose was indicated. Coprimary endpoints were SFRT utilization, impact on consultation-to-RT time, and on-couch treatment duration. Timing metrics were compared with a contemporary local cohort that received simulation-based palliative radiation therapy using unadjusted Wilcoxon rank-sum tests and a propensity score-matched regression. Electronic patient-reported outcomes captured 2-week toxicity and pain response. Between April 2018 and February 2024, 2849 palliative radiation courses were delivered, of which 1904 were eligible. Of the 1904 courses, 1000 (52.5% SFRT utilization) received SFRT, including 668 using intensity-modulated radiation therapy/volumetric-modulated arc therapy. A total of 788 individual patients received SFRT and the median age was 71 years (IQR, 61-80) with 59% being male and 42% being Eastern Collaborative Oncology Group 2-4. SFRT utilization increased from 41% to 54% between years 2018-2019 and 2022-2024. SFRT reduced median consultation-to-RT time from 7.0 to 5.1 days (P < .0001) corresponding to an adjusted average treatment effect in the treated of -2.1 days (95% CI, -2.8 to -1.3). SFRT increased median on-couch treatment duration from 17.8 to 20.5 minutes (P < .0001; adjusted average treatment effect in the treated 2.6 minutes, 95% CI, 1.3-3.9). Patient-Reported Outcomes Version of the Common Terminology Criteria for Adverse Events grade 3 acute toxicity was 9% and at 4 weeks after RT, patients with moderate/severe pain at baseline (≥5/10) had a mean pain reduction of 3.5 points (7.1-3.6; P < .0001). Using widely available technologies, the SFRT-1000 cohort demonstrates routine care scalability with patient-centered and workflow benefits. SFRT is an attractive new paradigm implementable in most settings following adaptation to local requirements. Thus, SFRT opens new avenues to potentially improve access to palliative RT, which remains a global area of need.

396. SHORT-TERM REVIEW: REAL-WORD EXPERIENCE OF PEMBROLIZUMAB AS FIRST-LINE CHEMOTHERAPY FOR ADVANCED ESOPHAGEAL SQUAMOUS CELL CARCINOMA

Abstract Background In Japan, Pembrolizumab, combined with standard chemotherapy (fluorouracil and cisplatin), was approved for first-line treatment of esophageal squamous cell carcinoma (ESCC) in November 2021. In advanced ESCC cases, modifications like omitting cisplatin or adding the palliative radiotherapy for malignant stenosis are sometimes necessary. The real-world application of Pembrolizumab with chemotherapy (Pem+C) in these scenarios remains uncertain. This review presents an overview of Pem+C’s short-term clinical outcomes in practice. Methods We retrospectively studied nineteen patients treated with Pem+C as the first-line chemotherapy for advanced ESCC from Nov. 2021 to Dec.2023. Response evaluation was primarily based on RECIST v1.1. Clinical worsening factored into some progression disease (PD) assessments. Adverse events were graded using CTC-AE v5.0. Kaplan-Meier survival curves were calculated by SPSS, with data cutoff on Dec. 31. 2023. Results Median age was 70 (49-83 years), PS (0/1/2):0/8/1, TPS (1≤/1≤/NE):1/2/16. Disease Status (Recurrence [locoregional/distant metastasis] /metastatic):3 [2/1] /16. Sequence of treatments (Pem+C alone/ concurrent palliative radiotherapy (pRT) consisting of 30-40Gy/ maintenance after chemoradiotherapy ):10/5/4. Three received only fluorouracil as backbone chemotherapy due to frailty. Median follow-up time, overall survival (OS) and progression free survival (PFS) were 8.3, 14.4, and 6.5 months, respectively. Responses in evaluable eighteen (CR/PR/nonCRnonPD/SD/PD):2/8/1/3/4. No unexpected severe adverse events (≥Grade3) were found. Among limited cases, concurrent pRT didn’t increased life-threatening AE; however, neutropenia ≥G3 seemed to be slightly frequent (2/5). One patient’s survival exceeded 24.8 months. Conclusion Our real-world experience with Pem+C in advanced ESCC includes diverse approaches clinical practices. The outcomes, while prelimiary, compare favorably with existing literature, without significant inferiority. The safety data and success case in the concurrent pRT group are significant, though limited by the small number of cases and short observation period. While further, more rigorous studies are necessary, adaptable Pem+C could be viable in practice.

111 Emergent Palliative Radiation Therapy During Ongoing Cyberattack: Designing Downtime Delivery Protocols to Ensure Safe and Effective Radiation Treatment

111 Emergent Palliative Radiation Therapy During Ongoing Cyberattack: Designing Downtime Delivery Protocols to Ensure Safe and Effective Radiation Treatment

Case - Long-term remission after repeated courses of palliative radiotherapy in a patient with metastatic MiT family translocation renal cell carcinoma.

Case - Long-term remission after repeated courses of palliative radiotherapy in a patient with metastatic MiT family translocation renal cell carcinoma.

148 Canadian Survey of Dedicated Palliative Radiotherapy Clinics

148 Canadian Survey of Dedicated Palliative Radiotherapy Clinics

87 a Systematic Review of Prognostic Factors in Patients with Cancer Receiving Palliative Radiotherapy: Evidence-Based Recommendations

87 a Systematic Review of Prognostic Factors in Patients with Cancer Receiving Palliative Radiotherapy: Evidence-Based Recommendations

88 Clinical Implementation of Same Day Volumetric Modulated Arc Therapy in a Rapid Access Palliative Radiotherapy Clinic Using an Automated Planning Script

88 Clinical Implementation of Same Day Volumetric Modulated Arc Therapy in a Rapid Access Palliative Radiotherapy Clinic Using an Automated Planning Script

Mediastinal Metastasis Isolated in Ovarian Cancer: A Systematic Review.

Isolated mediastinal metastases from ovarian carcinoma are considered exceptional. Since such metastases are considered advanced stage disease, systemic therapy is the indicated therapeutic approach; however, some articles report that surgical excision is also feasible. We reviewed the English-language literature to detect cases of isolated mediastinal ovarian cancer metastases and present the management applied as well as their outcomes. From 1998 to 2022, 15 such cases have been reported, with 4 of those cases being primary ovarian cancer presentation and 11 being ovarian cancer recurrence. The histology of the tumor was serious in all of the cases. Regarding the management of cancer, various methods were applied. In total, 11 of the patients underwent a surgical resection of the mediastinal metastasis, 2 received systemic therapy, 1 received a combination of palliative chemotherapy and radiation and the last patient was treated with laser debulking and radiotherapy. The mean reported follow-up was 11 months. Solitary mediastinal metastasis from ovarian cancer is very rare; physicians should pay close attention when routinely evaluating thoracic scans from patients with ovarian malignancy as well as individualizing the management in such patients, since surgical resection can also be performed. However, definitive conclusions cannot be drawn from the small number of case reports available.

Adult Tracheobronchomalacia that Progressed Following Radiotherapy in an Advanced-stage Lung Cancer Patient: A Rare Case Report

Tracheobronchomalacia (TBM) is the collapse of the trachea and bronchi, which leads to respiratory symptoms and complications, often on forced expiration. Radiotherapy (RT) is a rare cause of adult TBM. Here, we report the first case of progressive TBM following palliative RT in a patient with squamous cell lung carcinoma. TBM was diagnosed by fiberoptic bronchoscopy and thoracic CT scans. In patients with advanced-stage lung cancer who experience worsening dyspnea and cough following palliative RT, TBM should also be taken into account.

77: Palliative radiotherapy in children: implementation of Swedish national guidelines

77: Palliative radiotherapy in children: implementation of Swedish national guidelines

1066: Clinical Outcomes in Osteosarcoma Patients Treated with Palliative Radiotherapy

1066: Clinical Outcomes in Osteosarcoma Patients Treated with Palliative Radiotherapy

1261: A safe clinical introduction of MR-only workflow in cone-beam CT based palliative spine radiotherapy

1261: A safe clinical introduction of MR-only workflow in cone-beam CT based palliative spine radiotherapy

715: Efficacy and safety of palliative radiotherapy during immunotherapy for metastatic esophageal cancer

715: Efficacy and safety of palliative radiotherapy during immunotherapy for metastatic esophageal cancer