Efficacy and safety of selective internal radiotherapy with yttrium-90 resin microspheres compared with sorafenib in locally advanced and inoperable hepatocellular carcinoma (SARAH): an open-label randomised controlled phase 3 trial

Advances in Locoregional and Systemic Treatments for Hepatocellular Carcinoma

Significant advances have occurred in the locoregional and systemic therapy landscape for hepatocellular carcinoma (HCC), with the most notable being the introduction of immune checkpoint inhibitor (ICI) combinations. ICI combinations have significantly improved the overall survival of patients with unresectable HCC, affording median survival over 2 years and long-term survival exceeding 5 years in a subset of patients. Accordingly, there has been increased interest in the earlier application of systemic therapies, including (neo)adjuvant therapy in the perioperative setting or in combination with intra-arterial therapies. However, recent data failed to demonstrate improved recurrence-free survival with use of adjuvant ICI therapy. Conversely, 2 trials showed improved progression-free survival when ICI therapies were combined with transarterial chemoembolization, although data regarding the impact on overall survival are still immature. These improved outcomes raise several new questions, including which patients with liver-localized HCC should receive systemic therapy, how should this be sequenced or combined with other available therapies, and how to manage those patients with marked responses, including consideration of liver transplantation. These questions are often determined on a case-by-case basis and best made in a multidisciplinary manner considering several factors, including tumor burden, degree of liver dysfunction, performance status, and patient's long-term goals of care.

Dose-response relationships in Y90 resin microsphere radioembolization for patients with hepatocellular carcinoma: insights from a Brazilian cohort

OBJECTIVE

To evaluate the relationship between the absorbed dose and radiological response in patients with hepatocellular carcinoma undergoing resin microsphere radioembolization to enhance treatment precision and potentially adjust protocols for better outcomes.

METHODS

This single-center retrospective study was conducted at a quaternary care center in Brazil and comprised 27 patients with 58 target lesions treated between November 2014 and April 2023. The patients' dosimetric profiles were analyzed using advanced imaging software to assess post-treatment clinical and radiological responses. This study explored the correlation between the absorbed doses and tumor objective responses using statistical analyses to confirm the findings.

RESULTS

Higher absorbed doses were significantly associated with improved objective responses in the target lesions. The analysis demonstrated that achieving higher dosimetric thresholds correlated with better clinical outcomes, suggesting that a dose-response relationship is essential to optimize treatment protocols.

CONCLUSION

These findings emphasize the importance of personalized dosimetry in managing hepatocellular carcinoma using resin microsphere radioembolization. By quantifying the absorbed dose and understanding its impact on tumor response, treatment strategies can be tailored to enhance efficacy and potentially shift palliative treatments toward curative outcomes. This study provides a crucial foundation for dosimetric adjustment and highlights the need for further research in this area, particularly in Brazil.

Advances and Emerging Techniques in Y-90 Radioembolization for Hepatocellular Carcinoma

Hepatocellular carcinoma (HCC) is the fourth leading cause of cancer deaths worldwide. Despite the high incidence of HCC, mortality remains high, with an estimated 5-year survival rate of less than 20%. Surgical resection represents a potential curative treatment for HCC; however, less than 20% of patients with HCC are candidates for surgical resection. In patients with unresectable HCC, Yttrium-90 (Y90) transarterial radioembolization (TARE) has emerged as an innovative treatment option. This locoregional therapy delivers high doses of radiation directly to liver tumors via intra-arterial injection, allowing for the targeted destruction of malignant cells while sparing surrounding healthy tissue. In this review, we will explore the latest advances in Y90 TARE for the treatment of HCC, focusing on key developments such as the following: (1) improvements in radiation lobectomy and segmentectomy techniques, (2) the introduction of personalized dosimetry, (3) the integration of combination therapies, (4) the use of imageable microspheres, (5) pressure-enabled Y90 delivery systems, and (6) the application of Y90 surrogates.

Health-related quality of life in patients with unresectable hepatocellular carcinoma treated with SIRT and nivolumab: a sub-analysis of the NASIR-HCC trial

BACKGROUND

The health-related quality of life (HRQoL) impact of therapies for hepatocellular carcinoma (HCC) influences decision-making and treatment outcomes. The present study reports HRQoL results from NASIR-HCC, a single-arm study of selective internal radiation therapy (SIRT) with Y90 resin microspheres followed by nivolumab for unresectable HCC.

METHODOLOGY

Participants completed the EQ-5D-3 L, EQ-VAS, and FACT-Hep at baseline and on the first day of each nivolumab cycle. Linear mixed-effect models were used to calculate changes in outcomes in participants with the baseline and ≥ 1 follow-up measurement. Changes were assessed for clinical meaningfulness versus published minimally important differences.

RESULTS

Thirty-two patients from NASIR-HCC were included. Completion rates exceeded 70% at 62% of time points. Across EQ-5D-3 L domains, minimal changes were reported. Most patients had no problems at almost all time points. Mean index values were 0.864 at baseline and 0.763 in cycle 8, but this difference was not clinically meaningful. The small EQ-VAS increase, from 74.8 at baseline to 75.9 in cycle 8, was also not clinically meaningful. The various FACT scales remained stable, although transient but not clinically meaningful declines occurred for some scales. The median time to deterioration was 5.5 months for the FACT-Hep score.

CONCLUSIONS

Combining SIRT with nivolumab did not compromise HRQoL in patients with unresectable HCC. Study results were limited by the small number of patients but, combined with the previously reported clinical outcomes, suggested that the treatment combination deserves further consideration in this difficult-to-treat population.

TRIAL REGISTRATION NUMBER/DATE OF REGISTRATION

NCT03380130. First submitted on 2017-10-20; https://clinicaltrials.gov/study/NCT03380130 .

Precision surgery for hepatocellular carcinoma

Hepatocellular carcinoma arises in the setting of cirrhosis in most cases, requiring multidisciplinary input to define resectability. In this regard, more precise surgical management considers patient factors and anatomical states, including resection margins, tumour biology, and perioperative therapy. Together with advances in surgical techniques, this integrated approach has resulted in considerable improvements in patient morbidity and oncological outcomes. Despite this, recurrence rates in hepatocellular carcinoma remain high. As the systemic treatment landscape in hepatocellular carcinoma continues to evolve and locoregional options are increasingly used, we review current and future opportunities to individualise the surgical management of patients with hepatocellular carcinoma.

Combination locoregional and systemic therapies in hepatocellular carcinoma

Locoregional therapies play a fundamental role in the treatment of patients with early and intermediate and locally advanced hepatocellular carcinomas. With encouraging recent advances in immunotherapy-based systemic therapies, locoregional therapies are being both promoted and challenged by new systemic therapy options. Combined locoregional and systemic therapies might enhance treatment outcomes compared with either option alone. This Series paper summarises the existing data on locoregional and systemic therapies for hepatocellular carcinoma, and discusses evidence from studies investigating their combination with a focus on their synergistic efficacy and safety.

Emerging evidence-based role for external-beam radiation therapy in hepatocellular carcinoma

The primary curative therapies for hepatocellular carcinoma are resection or liver transplantation. For patients requiring downstaging or who are unresectable at presentation, the landscape of local treatment options has vastly changed over the past decades. This change is partly due to the paucity of high-level evidence to guide the selection of liver-directed therapies, where physician preference and treatment patterns have historically resulted in relegating external-beam radiation therapy (EBRT) to a secondary option in the treatment of hepatocellular carcinoma in cases where arterially directed therapies or thermal ablations were not possible. However, technology advancements have substantially improved the ability to treat liver malignancies with high doses of radiation therapy and to minimise doses to uninvolved hepatic parenchyma and other nearby organs. These advancements have enabled safe treatment of hepatocellular carcinoma with EBRT, with low risk of toxicity. Recent randomised trials support the role of EBRT in the treatment of hepatocellular carcinoma from early to advanced stages. These trials identified that EBRT improved several key patient-centred outcomes, including overall survival when using stereotactic body radiotherapy and sorafenib compared with sorafenib alone in unresectable hepatocellular carcinoma, recurrence-free survival with the use of adjuvant EBRT in select patients after hepatocellular carcinoma resection, and quality of life for patients with painful hepatocellular carcinoma masses treated with palliative EBRT. With emerging high-quality evidence, hepatocellular carcinoma therapeutic guidelines should include the growing role of EBRT in improving the quality and quantity of life for patients with liver cancer.

166Ho-RadioEmbolizaTiOn Using personalized prediCtive dosimetry in patients with Hepatocellular carcinoma: A prospective, single-centre study (RETOUCH)

BACKGROUND AND AIMS

Holmium-166 (166Ho) radioembolization could offer a more individualized approach in terms of imaging and dosimetry. We aim to evaluate the feasibility and safety of 166Ho selective internal radiation therapy (SIRT) using a higher tumour dose than previously administered determined by 166Ho-scout as a surrogate marker in HCC patients.

METHODS

This is an open-label, prospective, non-randomized, single-centre pilot study that included patients with HCC that received 166Ho-SIRT if the work-up using 166Ho-scout showed a tumour-absorbed dose ≥150 Gy, a non-tumoural liver absorbed dose less than 60 Gy and a lung absorbed dose less than 30 Gy. Primary endpoints were feasibility and safety-toxicity profiles at 24-48 h and 1 month. Overall response rates (ORR) at 3 months (mRECIST, RECIST 1.1 and metabolic response by FDG and choline PET CT) and time to progression (TTP) represented the secondary endpoints.

RESULTS

Fifteen patients with large tumours (mean diameter 55.67 ± 28.42 mm) received 17 166Ho-SIRT treatments between July 2020 and June 2022. All the attempted treatments were accomplished. Mean administered tumour dose was 183.18 ± 71.71 Gy, while non-tumour liver dose was 30.29 ± 14.56 Gy. Median time of follow-up was 12 months (IQR 9-16). Only grade 1-2 clinical and biological AEs were observed. There were no liver decompensations. At 3 months, objective response was achieved for all target lesions (CR 78.57%, PR 21.43% according to mRECIST). Median TTP was 18.8 (range 2.9; n.e.) months.

CONCLUSION

Personalized 166Ho-SIRT with a tumour delivered dose ≥150 Gy was feasible and safe for HCC patients with promising response rates.

Hepatocellular Carcinoma with Vascular Invasion Treated with Resin Yttrium-90 Transarterial Radioembolization Using Single Compartment Dosimetry

PURPOSE

To report outcomes in hepatocellular carcinoma (HCC) patients with lobar and segmental vascular invasion treated with resin Yttrium-90 transarterial radioembolization (Y90-TARE) with single-compartment MIRD (Medical Internal Radiation Dose) model.

MATERIALS AND METHODS

This was a retrospective IRB approved study of patients with a diagnosis of HCC with vascular invasion undergoing resin Y90-TARE from 2014 to 2022 (n = 61). Patients with Body Surface Area dosimetry (n = 20), main portal vein invasion (n = 6) and patients with an ECOG of > 2 were excluded (n = 1) with a final cohort of 34 patients.

RESULTS

Study population consisted of 34 patients, median age 62 years [60-71], tumor size 4.2 (2.8-7.4) cm, and 82% male. The median prescribed dose was 170 (126-200) Gy. The objective response rate at 6 months was 67% and disease control rate was 72%. The median survival was 18 months, median progression-free survival was 9.8 months. The 1- and 3-year survival rates were 76% and 57% in patients prescribed > 180 Gy, compared to 29% and 15% in patients with < 180 Gy (p = 0.01). Five of 15 Childs-Pugh A, ECOG < 1 patients (33%) were downstaged to resection, with complete pathologic necrosis in 40%, and 1 and 3-year survival rates of 100%. Grade-3 adverse events were seen in only 5/34 (15%), with no grade-4 or 5 adverse events.

CONCLUSION

Resin Y90-TARE using single compartment MIRD model for HCC with segmental and lobar vascular invasion can result in downstaging to resection in 33% of patients and higher prescribed doses (> 180 Gy) result in improved survival.

The Impact of Radiation Dose and Tumour Burden on Outcomes in Hepatocellular Carcinoma: 11-Year Experience in a 413-Patient Cohort Treated with Yttrium-90 Resin Microsphere Radioembolisation

Introduction

Transarterial radioembolisation (RE) using yttrium-90 (Y-90) microspheres is a widely used locoregional therapy for a broad spectrum of hepatocellular carcinoma (HCC) given its favourable safety profile. We evaluated the real-world outcomes of unresectable HCC treated with resin Y-90 RE and the relationship between tumour absorbed dose and subsequent curative therapy with survival.

Methods

Included were consecutive patients treated with Y-90 resin microspheres RE for unresectable HCC between January 2008 and May 2019 at the National Cancer Centre Singapore/Singapore General Hospital. The outcomes were stratified by tumour burden, distribution, presence of portal vein invasion (PVI) and liver function to improve prognostication.

Results

The median overall survival (OS) evaluated on 413 included patients was 20.9 months (95% CI: 18.2-24.0). More than half of the patients (214/413, 51.8%) had HCC beyond up-to-seven criteria, and 37.3% had portal vein invasion (154/413, 37.3%). Majority (71.7%) had dosimetry calculated based on the partition model. Patients who received ≥150 Gy to tumour had significantly better outcomes (OS 32.2 months, 95% CI: 18.3-46.4) than those who did not (OS 17.5 months, 95% CI: 13.7-22.7, p < 0.001). Seventy patients (17%) received curative therapies after tumour was downstaged by Y-90 RE and had better OS of 79.7 months (95% CI: 40.4 - NE) compared to those who did not receive curative therapies (OS 17.1 months; 95% CI: 13.5-20.4, p < 0.001). RE-induced liver injury was observed in 5.08% of the patients while 3.2% of the patients had possible radiation pneumonitis but none developed Grade 3-4 toxicity. For HCC without PVI, OS differed significantly with performance status, albumin-bilirubin grade, tumour distribution, and radiation dose; for HCC with PVI, Child-Pugh class and AFP were significant predictors of survival.

Conclusions

Treatment outcomes for unresectable HCC using Y-90 RE were favourable. Incorporating tumour burden and distribution improved prognostication. Patients who received tumour absorbed dose above 150 Gy had better OS. Patients who subsequently received curative therapies after being downstaged by Y-90 RE had remarkable clinical outcomes.

Advances in radiation therapy for HCC: Integration with liver-directed treatments

HCC is the fourth leading cause of cancer-related mortality with increasing incidence worldwide. Historically, treatment for early disease includes liver transplantation, surgical resection, and/or other local therapies, such as thermal ablation. As a result of technical advances and high-quality prospective data, the use of definitive external beam radiotherapy with ablative doses has emerged. Intermediate-stage disease has been generally addressed with arterially directed therapies (eg, chemoembolization or radioembolization) and external beam radiotherapy, while advanced stages have been addressed by systemic therapy or best supportive care. The role of each local/locoregional therapy has rapidly evolved in the context of novel pharmacotherapies, including immunotherapies and antiangiogenic agents. The combinations, indications, and timing of treatments vary widely among specialties and geographies. Here, we aim to synthesize the best quality evidence available regarding the efficacy and safety of different liver-directed modalities, with a focus on recent prospective clinical data of external beam radiotherapy within the context of other available liver-directed therapies across Barcelona Liver Classification (BCLC) stages.

Usefulness of multiphasic MRI in assessing suitability for SIRT in treatment of liver malignancies

AIM

To evaluate the predictive value of multiphasic magnetic resonance imaging (MRI) in identifying liver tumor perfusion characteristics and to compare it with hepatic artery perfusion scintigraphy findings in patients considered for selective internal radiation therapy (SIRT) with yttrium-90 (Y-90).

METHODS

This study included 93 patients diagnosed with primary or secondary liver cancer between May 2021 and February 2024, comprising 47 patients (27 M/20F) deemed unsuitable for SIRT and 46 patients (26 M/20F) eligible for SIRT. The relationship between multiphasic MRI and scintigraphy findings in determining perfusion of tumors was analyzed. Predictive performance was evaluated with receiver operating characteristic (ROC) analysis, and the optimal cut-off values were determined using the Youden index.

RESULTS

The SIRT unsuitable group had a lower frequency of intratumoral arterial phase hyperenhancement(APHE) (40.43% vs. 69.57%, p = 0.042), presence of hyperintensity on T2 sequence (72.34% vs. 95.65%, p = 0.026), lower lesion intensity in the portal phase (p = 0.033), and a lower lesion-to-liver intensity ratio in the portal phase (≤ 0.97, p = 0.011). The absence of intratumoral APHE [p = 0.049, AUC (95% CI) = 0.646 (0.508-0.783)] and a lesion-to-liver intensity ratio in the portal phase with a cut-off value of ≤ 0.97 [p = 0.011, AUC (95% CI) = 0.689 (0.564-0.815)] were significant predictors of SIRT unsuitability.

CONCLUSION

Both the absence of intratumoral APHE and a lower lesion-to-liver intensity ratio in the portal phase were significant predictors of SIRT unsuitability.

Final Results of a Multicenter Prospective Study of Stereotactic Body Radiation Therapy for Previously Untreated Solitary Primary Hepatocellular Carcinoma (The STRSPH Study)

PURPOSE

To report final results of a prospective study of stereotactic body radiation therapy (SBRT) in patients with previously untreated solitary primary hepatocellular carcinoma (HCC).

METHODS AND MATERIALS

This prospective, single-arm, multicenter phase 2 trial recruited patients with HCC who were unsuitable for, or refused, surgery and radiofrequency ablation, with 3-year overall survival rates as the primary endpoint and survival outcomes and adverse events as secondary endpoints. The prescribed SBRT dose was 40 Gy in 5 fractions. The final data were analyzed in November 2022.

RESULTS

Between 2014 and 2018, 36 patients (median age, 73.5 years) were registered; enrollment was closed before full recruitment due to slow accrual. Overall, 34 patients were analyzed for efficacy evaluation after excluding 2 patients. The median tumor size was 2.3 cm. The median follow-up times for all patients and for survivors were 49 and 56 months, respectively. The 3-year overall survival rate was 82% (95% confidence interval, 65%-92%). The 3-year local control rate was 93% (95% confidence interval, 76%-98%). Grade 3 or higher SBRT-related nonlaboratory toxicities were observed in 4 patients (11%). No grade 5 adverse events were observed.

CONCLUSIONS

Final results of this phase 2 trial suggest the efficacy and safety of SBRT for newly diagnosed early-stage HCC that is unfit for other local therapies. Although this study was underpowered by the small number of registrations, the excellent results indicate that SBRT may be an alternative option for the management of early-stage HCC.

90Y-Transarterial Radioembolization Combined with Immune Checkpoint Inhibitors in Hepatocellular Carcinoma: A Systematic Review

BACKGROUND

Transarterial radioembolization with yttrium-90 (90Yt-TARE) and immune checkpoint inhibitors (ICIs) are emerging as treatment modalities for intermediate to advanced hepatocellular carcinoma (HCC) based on randomized controlled trials. Herein, we systematically reviewed the published literature on the effects of 90Yt-TARE and ICIs combined on clinical outcomes of HCC.

METHODS

Medical databases of PubMed, Embase, and Cochrane Library were systematically searched for all studies assessing the use of concomitant immunotherapy of ICI with TARE in patients with HCC. Patient characteristics, treatment protocols, treatment outcomes, treatment adverse events, and survival outcomes were extracted after the screening phase. The primary outcomes were overall survival (OS) and patient-free survival (PFS), while the secondary outcomes were imaging objective response (OR) and adverse events.

RESULTS

Among 3432 reviewed, ten studies were included in this systematic review, including four randomized controlled trials and six retrospective studies. These consisted of 413 patients with HCC, and seven studies included patients with Child-Pugh A or B7 scores. Most studies allowed advanced or intermediate HCC stages, but only two specified BCLC stages (B and C). Median tumor sizes ranged from 56 to 78.5 mm. Various agents with different administration schedules were used as ICIs for immunotherapy by different studies for the combination of 90Yt-TARE with ICIs. Median OS ranged from 16.2 to 27 months between different studies while the PFS also ranged from 5.6 to 13.3 months. The OR rates according to imaging-based response assessments were reported between 31 and 89%, and the incidence rate of any grade toxicities was between 50 and 80%.

CONCLUSION

Concomitant treatment with 90Yt-TARE and ICIs has shown promising results in the treatment of patients with HCC. Further studies are required to reach a consensus on the optimal treatment protocol and the outcome of these treatments for patients with intermediate to advanced HCC.

Endoscopic Ultrasound-Guided Brachytherapy of Yttrium-90 Implantation Into Pancreas: A Dose-Escalation Pilot Study

Intratumoral brachytherapy enables higher dose treatment and reduces damage to adjacent tissues. We first validated the feasibility and safety of endoscopic ultrasound (EUS)-guided Yttrium-90 (90Y) microspheres implantation in a porcine model. Under EUS guidance, 90Y-loaded microspheres were implanted into the pancreas of 10 miniature pigs. The first pig was implanted with 10 MBq particles. Subsequently, nine pigs were sequentially included in the low- (20 MBq), medium- (40 MBq), and high-dose (60 MBq) groups. Positron emission tomography (PET)/CT imaging was used to check the occurrence of particle displacement postoperatively. After euthanasia, the pancreas and adjacent organs were excised for histological examination and residue radiation detection. The absorbed doses demonstrated safe in the porcine model were further in the xenograft model and KRASLSL/+Trp53FL/FLPtfqaCre/+ mouse model. EUS-guided implantations of 90Y-loaded microspheres were successful in all animals. Two pigs had mild serum amylase elevation in the high-dose group and the abnormal index returned to baseline without interventions. The volume of necrotic lesions ranged from 255.76 to 745.57 mm3. In KPC mouse model, PET/CT imaging demonstrated a significant decrease in maximum standardized uptake value (SUVmax) after 90Y implantation. EUS-guided 90Y-loaded carbon microsphere implantation could serve as a safe and feasible technique at ultrahigh dose for pancreatic cancer brachytherapy.

Radioembolization as a Spearhead Treatment of Hepatocellular Carcinoma with Localized Portal Vein Tumor Thrombosis (RESOLVE): Protocol for an Open-label, Multi-center, Single-arm Trial

PURPOSE

To evaluate the efficacy, safety, and clinical course following ablative radioembolization with glass microspheres for hepatocellular carcinoma (HCC) with localized portal vein tumor thrombosis (PVTT) in patients with well-preserved liver function.

MATERIALS AND METHODS

This is a prospective, open-label, multi-center, single-arm, phase II trial. Key inclusion criteria are unilobar HCC, PVTT confined to the ipsilateral lobe (Vp1-3), no extrahepatic spread, Child-Pugh class A, and a performance status of ≤ 1. Main exclusion criteria are hepatic venous tumor thrombus, bile duct invasion, and massive arterioportal shunting. Depending on the extent of the tumor and PVTT, patients will undergo radiation segmentectomy, modified radiation lobectomy, or ablative lobar treatment, while adhering to dose limits for the non-tumorous liver and lung. The primary outcome measure is overall survival, with the overall survival rate at two years provided as the summary measurement.

STATISTICS

This study will enroll 30 patients to explore the efficacy and safety of ablative radioembolization for HCC with localized PVTT. Efficacy will be evaluated by intention-to-treat and per-protocol populations. Safety will be assessed for all patients who received radioembolization at any dose.

EXPECTED GAIN OF KNOWLEDGE

This study aims to address the potential of ablative radioembolization as a definitive or effective downstaging treatment for HCC with localized PVTT, where locoregional treatments may be more beneficial than systemic treatments. The results will help establish treatment outcomes that can serve as a standard for future comparative studies and contribute to the standardization of radioembolization approaches for HCC with localized PVTT.

TRIAL REGISTRATION

ClinicalTrials.gov ( https://classic.

CLINICALTRIALS

gov/ct2/show/NCT06166576 ). Identifier: NCT06166576.

Safety and Efficacy of Selective Internal Radiation Therapy for Portal Vein Tumour Thrombus in Advanced Hepatocellular Carcinoma: A Single-Centre Experience in Australia

INTRODUCTION

Portal vein tumour thrombus (PVTT) is a common complication of hepatocellular carcinoma (HCC) and has a poor prognosis. Selective internal radiation therapy (SIRT) with Yttrium-90 (Y90) microspheres is a minimally invasive treatment option that has shown promise in treating PVTT. Studies have suggested a survival advantage of SIRT in this population, but data in the Australasian population are lacking. The aim of this study was to evaluate the safety and efficacy of SIRT in a series of patients at an Australian hospital with advanced HCC and PVTT.

METHOD

All patients underwent pre-treatment imaging with MRI or CT, and immediate post-treatment imaging with Y90 PET CT and MRIs at 3-, 6-, 9- and 12-months. The primary endpoints were time to progression (TTP) and overall survival (OS) post-SIRT. The secondary endpoint was safety.

RESULTS

Of the 698 patients who underwent SIRT at our institution between 2007 and 2023, 64 patients had HCC and PVTT. 59/64 (92%) were male, with a median age of 61 years (range 37-86 years). The majority of patients had Child-Pugh a cirrhosis (87%), and the majority were ECOG 0 (91%). The majority had main PVTT at the time of SIRT. All patients underwent SIRT with Y90-coated resin microspheres (SIR-Spheres, Sirtex Medical, Australia). Personalised dosimetry planning was performed by the treating interventional radiologist. SIRT was well tolerated by most patients, with major complications reported in a minority of cases (19/64 patients had an episode of biochemical decompensation within 90 days following treatment). The median TTP was 4.8 months (range 1-48 months). The median OS was 11.5 months (range 1-80 months), with those with a favourable MAAPE score having a median OS of 21.2 months (12.6-29.7 months).

CONCLUSIONS

Our cohort suggests that SIRT is a safe and effective treatment option for a difficult-to-treat patient population. Our data suggest a longer OS for those with preserved liver function, good functional status and low AFP levels at 21.2 months. Poor pre-treatment liver function and functional status are predictors of decompensation, and decompensation is a predictor of poor survival. These data provide an Australasian perspective and support the expanding role of SIRT in HCC treatment guidelines. Further prospective studies with larger sample sizes and longer follow-up are warranted to confirm these findings.

Outcomes of Stereotactic Body Radiotherapy Compared with Surgical Resection in Patients with Hepatocellular Carcinoma and Macrovascular Invasion: A Propensity Score-Matched Analysis

INTRODUCTION

Patients with advanced hepatocellular carcinoma (HCC) and macrovascular invasion (MVI) are recommended to receive systemic therapy according to guidelines. Stereotactic body radiotherapy (SBRT) and surgery are increasingly used in this patient population. This study compares outcomes from these local treatments.

METHODS

Patients diagnosed with HCC with MVI and treated with surgery or SBRT between 1999 and 2022 were included. Propensity score matching minimized bias from confounders. Overall survival (OS) was analyzed using the Kaplan-Meier method,. and local, regional, and distant recurrences were assessed via competing risk methods. Univariable and multivariable analyses adjusted by the Lasso method evaluated OS predictors.

RESULTS

Among 175 patients, 38 underwent surgery and 137 received SBRT. The median age was 61 years, tumor volume was 158.6 cc, and α-fetoprotein level was 197 IU/mL. Most surgical patients had major resection (74%) via an open approach (97%). The median biologically effective dose (BED) for SBRT was 53.7 Gy. After matching, 35 patients per group had a median OS of 16 months. Local failure was higher in the SBRT group (20%) than in the surgery group (12%) at 1 year (p = 0.028). Distant failure was more frequent in surgery (54%) compared with SBRT (17%) [p = 0.003]. Excluding SBRT patients receiving adjuvant systemic therapy did not change the results. In-hospital mortality was 9% post-surgery and 14% experienced post-SBRT liver impairment.

CONCLUSION

Both surgery and SBRT offer good long-term OS and control. Surgery provides better local control, while SBRT had lower distant relapse. While SBRT has acceptable toxicity, surgery carries a significant mortality risk.

Advancements in locoregional therapy for advanced hepatocellular carcinoma: Emerging perspectives on combined treatment strategies

Hepatocellular carcinoma (HCC) persists as a leading cause of cancer-related mortality, often diagnosed at advanced stages with limited treatment options. Locoregional therapies (LRTs) are crucial in HCC management, playing significant roles in neoadjuvant and palliative treatments, among others. However, the unique disease background of HCC necessitates multidisciplinary and integrated treatment strategies. The therapeutic landscape for advanced HCC has been significantly broadened by the advent of combined therapies, presenting multiple approaches aimed at improving long-term survival, which remains a critical challenge. This review offers a comprehensive overview of major LRTs for HCC, highlighting recent technological advancements and exploring the challenges and limitations in their application, and presents the latest developments in combination therapies, including combinations between different LRTs and their integration with systemic treatments. Additionally, we outline future directions for the development of integrated treatment modalities for advanced HCC.

Stereotactic Body Radiotherapy vs Sorafenib Alone in Hepatocellular Carcinoma: The NRG Oncology/RTOG 1112 Phase 3 Randomized Clinical Trial

Importance

Most patients with locally advanced hepatocellular carcinoma (HCC) recur within the liver following systemic therapy.

Objective

To determine whether stereotactic body radiation therapy (SBRT) improves outcomes in patients with locally advanced HCC compared with sorafenib alone.

Design, Setting, and Participants

This multicenter phase 3 randomized clinical trial randomized patients with HCC 1:1 to sorafenib or SBRT followed by sorafenib, stratified by performance status, liver function, degree of metastases, and macrovascular invasion. Eligible patients had HCC unsuitable for or refractory to standard local-regional therapies and were candidates for first-line systemic therapy. Data were collected from April 2013 to March 2021, and data were analyzed from July 2022 to August 2023.

Intervention

Personalized SBRT, 27.5 to 50 Gy in 5 fractions.

Main Outcomes and Measures

The primary end point was overall survival (OS). Secondary end points were progression-free survival (PFS), adverse events, and quality of life.

Results

Of 193 patients randomized, 177 were eligible. Accrual was stopped early due to a change in standard-of-care systemic therapy. Of 177 included patients, 150 (84.7%) were male, and the median (IQR) age was 66 (60-72) years. Macrovascular invasion was seen in 131 (74.0%). As of July 1, 2022, the median OS was 12.3 months (90% CI, 10.6-14.3) with sorafenib vs 15.8 months (90% CI, 11.4-19.2) following SBRT and sorafenib (hazard ratio [HR], 0.77; 90% CI, 0.59-1.01; 1-sided P = .06). Adjusting for stratification factors, OS was improved with SBRT (HR, 0.72; 95% CI, 0.52-0.99; 2-sided P = .04). Median PFS was improved from 5.5 months (95% CI, 3.4-6.3) with sorafenib to 9.2 months (95% CI, 7.5-11.9) with SBRT and sorafenib (HR, 0.55; 95% CI, 0.40-0.75; 2-sided P < .001). Treatment-related grade 3 or higher adverse events were seen in 37 of 88 (42%) and 39 of 83 (47%) of patients treated with sorafenib vs SBRT and sorafenib, respectively (P = .52). There were 2 treatment-related deaths in the sorafenib group (death not otherwise specified and liver failure) and 1 in the SBRT and sorafenib group (lung infection). At 6 months, improved quality of life was seen in 2 of 20 (10%) and 6 of 17 (35%) of patients treated with sorafenib and SBRT and sorafenib, respectively.

Conclusions and Relevance

In this phase 3 randomized clinical trial, among patients with locally advanced HCC, SBRT was associated with a clinically important but not statistically significant improved overall survival compared with sorafenib alone.

Trial Registration

ClinicalTrials.gov Identifier: NCT01730937.

EASL Clinical Practice Guidelines on the management of hepatocellular carcinoma

Liver cancer is the third leading cause of cancer-related deaths worldwide, with hepatocellular carcinoma (HCC) accounting for approximately 90% of primary liver cancers. Advances in diagnostic and therapeutic tools, along with improved understanding of their application, are transforming patient treatment. Integrating these innovations into clinical practice presents challenges and necessitates guidance. These clinical practice guidelines offer updated advice for managing patients with HCC and provide a comprehensive review of pertinent data. Key updates from the 2018 EASL guidelines include personalised surveillance based on individual risk assessment and the use of new tools, standardisation of liver imaging procedures and diagnostic criteria, use of minimally invasive surgery in complex cases together with updates on the integrated role of liver transplantation, transitions between surgical, locoregional, and systemic therapies, the role of radiation therapies, and the use of combination immunotherapies at various stages of disease. Above all, there is an absolute need for a multiparametric assessment of individual risks and benefits, considering the patient's perspective, by a multidisciplinary team encompassing various specialties.

Transarterial Radioembolisation with Y90 Resin Microspheres and the Effect of Reimbursement Criteria in France: Final Results of the CIRT-FR Prospective Observational Study

PURPOSE

This analysis of the CIRSE Registry for SIR-Spheres Therapy in France, CIRT-FR, reports on real-world outcomes of transarterial radioembolisation (TARE) with Y90 resin microspheres for hepatocellular carcinoma (HCC) and colorectal cancer liver metastases (CRLM) patients in France, focusing on safety, effectiveness and health-related quality of life (HRQoL). Results on patients treated based on national reimbursement criteria are discussed here.

METHODS

Prospective, multicentre, observational study of HCC and CRLM patients treated between August 2017 and July 2020 with TARE Y90 resin microspheres. Patients were assigned to different analysis groups based on reimbursement recommendations. Follow-up period was at least 24 months with patient data collected every 3 months.

RESULTS

In total, 252 (193 HCC, 59 CRLM) patients of CIRT-FR were included in the analysis. No differences in effectiveness, safety and HRQoL were found between analysis groups based on reimbursement recommendations. Median overall survival for HCC and CRLM was 19.0 (95% CI, 16.1-22.4) and 10.8 (95% CI, 8.0-13.5) months, respectively. Serious procedure-related adverse events occurred in 13% of the patients. HRQoL generally remained stable, with some fluctuations in function scores and symptoms.

CONCLUSION

In our cohorts, patients performed similarly regarding clinical outcomes irrespective of their analysis group based on reimbursement recommendations. Our results suggest that instead of restrictive reimbursement criteria, more decision-making power in selecting suitable patient groups could be given to multidisciplinary tumour boards. Results confirm that TARE with Y90 resin microspheres is an effective and safe treatment for liver cancer, with maintained HRQoL in most patients.

Systemic Therapy for Hepatocellular Carcinoma

Systemic therapy for hepatocellular carcinoma has evolved from sorafenib to now include immune checkpoint blockade, either atezolizumab/bevacizumab or durvalumab/tremelimumab, and soon to include camrelizumab/rivoceranib and nivolumab/ipilimumab. Second-line therapy remains predominantly either a multikinase inhibitor or ramucirumab. Areas of development include testing immune checkpoint-based regimens in the adjuvant setting after surgery, ablation, or transarterial embolization. Also of interest are studies for patients with Child-Pugh B liver function and adding new checkpoint molecules to the current standard platforms.

Digestive cancers: mechanisms, therapeutics and management

Cancers of the digestive system are major contributors to global cancer-associated morbidity and mortality, accounting for 35% of annual cases of cancer deaths. The etiologies, molecular features, and therapeutic management of these cancer entities are highly heterogeneous and complex. Over the last decade, genomic and functional studies have provided unprecedented insights into the biology of digestive cancers, identifying genetic drivers of tumor progression and key interaction points of tumor cells with the immune system. This knowledge is continuously translated into novel treatment concepts and targets, which are dynamically reshaping the therapeutic landscape of these tumors. In this review, we provide a concise overview of the etiology and molecular pathology of the six most common cancers of the digestive system, including esophageal, gastric, biliary tract, pancreatic, hepatocellular, and colorectal cancers. We comprehensively describe the current stage-dependent pharmacological management of these malignancies, including chemo-, targeted, and immunotherapy. For each cancer entity, we provide an overview of recent therapeutic advancements and research progress. Finally, we describe how novel insights into tumor heterogeneity and immune evasion deepen our understanding of therapy resistance and provide an outlook on innovative therapeutic strategies that will shape the future management of digestive cancers, including CAR-T cell therapy, novel antibody-drug conjugates and targeted therapies.

A bibliometric analysis of 30 years of research on transarterial radioembolization (TARE) for hepatocellular carcinoma

Introduction

Patients with advanced hepatocellular carcinoma (HCC) have very limited treatment options, among which transarterial radioembolization (TARE) receives increasing attention, relying on its promising efficacy and fewer side effect. However, a bibliometric analysis of TARE for HCC is still lacking. This study employed bibliometric methods to analyze the related articles over the past three decades, and aimed to identify trends in clinical research comparing TARE to other treatments.

Methods

Articles related with TARE for HCC were obtained from the Web of Science (WoS). After screening, the R package Bibliometrix was employed to explore the primary bibliometric characteristics. The number of publications was analyzed and mathematically fitted to a curve using Microsoft Excel 2021 and SPSS 25, and then was plotted in the graph using GraphPad Prism 8.0. VOSviewer, SCImago Graphica, and Pajek were utilized for the analysis of researchers' co-authorship, co-occurrence, and visualization. Keywords citation burst was detected by CiteSpace software.

Results

A total of 1,110 articles from 1993 to 2023 were included in our final analysis, among which the United States not only ranked the first in term of the number of published articles, also was at the forefront in other important indicators, including the total number of article citations and the average citation frequency. Riad Salem from Northwestern University, also being the organization with the greatest number of research papers, was the most active author and has published 96 papers. The keywords were classified into three clusters: 90Y microspheres for TARE, Basic research on TARE, and Clinical trial of TARE for HCC. Furthermore, we identified the most frequently cited keywords with strong citation bursts since 2020 were "multicenter," "overall survival" and "PET/CT."

Conclusion

Our study employed a bibliometric approach to achieve the visualization research on TARE for HCC, and further revealed the trends and frontiers of TARE research, providing valuable information for researchers to identify the critical and persistent challenges and select potential partners in related area. Based on our analysis, future research focus include the clinical comparative studies on the effect of TARE and TACE combined with immunotherapies or targeted therapy, dosimetry, and personalized TARE therapy for HCC.

Transarterial Radioembolization Can Downstage Intermediate and Advanced Hepatocellular Carcinoma to Liver Transplantation

BACKGROUND

Transarterial radioembolization (TARE) is an effective treatment to control tumor growth and improve survival in hepatocellular carcinoma (HCC). The role of TARE in downstaging patients to liver transplantation (LT) is unclear. The aim of this study was to investigate the downstaging efficacy of TARE for intermediate and advanced HCC.

METHODS

Intention-to-treat analysis with multistate modeling was performed. Patients moved through 5 health states: (1) from TARE to listing, (2) from TARE to death without listing, (3) from listing to LT, (4) from listing to death without LT, and (5) from transplant to death. Factors affecting the chance of death after TARE were considered to stratify outcomes.

RESULTS

Two hundred fourteen patients underwent TARE. Of those, 43.9% had radiological response, 29.9% were listed, and 22.8% were transplanted. The probability of being alive without LT was 40.5% 1 y after TARE and 11.5% at 5 y. The chance of being listed was 9.4% at 1 y and 0.9% at 5 y. The probability of dying after TARE without LT was 38% at 1 y and 73% at 5 y. The overall survival of patients receiving LT was 61% at 5 y after transplant. Tumor beyond up-to-seven criteria, alfafetoprotein >400 ng/mL, and albumin-bilirubin ≥2 were associated with death. Three risk groups were associated with different response, chances of being listed, and receiving LT. Median survival was 3 y for low-risk, 1.9 y for intermediate-risk, and 9 mo for high-risk patients ( P  < 0.001).

CONCLUSIONS

In intermediate and advanced HCC, TARE allows for a 44% chance of response, 30% downstaging, and 23% probability of permitting LT. Patient's and tumor's characteristics allow for risk stratification and predict survival from TARE.

Hepatic arterial infusion chemotherapy combined with lenvatinib and PD-1 inhibitors versus lenvatinib and PD-1 inhibitors for unresectable HCC: a meta-analysis

Objectives

This study aimed to evaluate the effectiveness of combining hepatic arterial infusion chemotherapy (HAIC) with lenvatinib and programmed cell death protein 1 (PD-1) inhibitors in the treatment of advanced, unresectable hepatocellular carcinoma (HCC).

Methods

A comprehensive search across multiple databases was conducted to identify relevant studies published up to May 2024. This search focused on clinical trials investigating the combination of HAIC with lenvatinib and PD-1 inhibitors for the treatment of advanced HCC. Data from these trials were analyzed using either fixed-effects or random-effects models, with results reported as hazard ratios (HRs) or risk ratios (RRs) with 95% confidence intervals (CIs). To evaluate the robustness of the findings, trial sequential analysis was employed.

Results

A total of 8 cohort studies encompassing 1073 patients with unresectable HCC were included. Compared with other treatment regimens, the combined use of HAIC, lenvatinib, and PD-1 inhibitors significantly improved overall survival (OS) (HR=0.53 [95% CI 0.45, 0.63], P<0.00001), progression-free survival (PFS) (HR 0.56 [95% CI 0.46, 0.61], P<0.0001), the objective response rate (ORR) (RR=1.82 [95% CI 1.52, 2.18], P<0.00001), and the disease control rate (DCR) (RR=1.24 [95% CI 1.16, 1.33], P<0.00001). Trial sequential analysis (TSA) results indicated that the existing data were sufficient for making quantitative conclusions about the ORR and DCR.

Conclusion

Combining HAIC with lenvatinib and PD-1 inhibitors enhances the effectiveness of treatment for unresectable HCC. This approach is particularly beneficial for patients who have a high tumor burden or those who are refractory to transarterial chemoembolization (TACE), providing a more effective solution for these challenging cases.

Systematic review registration

https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42024575853, identifier CRD42024575853.

Current Treatment Methods in Hepatocellular Carcinoma

Hepatocellular carcinoma (HCC) is a prevalent malignant tumour worldwide. Depending on the stage of the tumour and liver function, a variety of treatment options are indicated. Traditional radiotherapy and chemotherapy are ineffective against HCC; however, the U.S. Food and Drug Administration (FDA) has approved radiofrequency ablation (RFA), surgical resection, and transarterial chemoembolization (TACE) for advanced HCC. On the other hand, liver transplantation is recommended in the early stages of the disease. Tyrosine kinase inhibitors (TKIs) like lenvatinib and sorafenib, immunotherapy and anti-angiogenesis therapy, including pembrolizumab, bevacizumab, tremelimumab, durvalumab, camrelizumab, and atezolizumab, are other treatment options for advanced HCC. Moreover, to maximize outcomes for patients with HCC, the combination of immune checkpoint inhibitors (ICIs) along with targeted therapies or local ablative therapy is being investigated. This review elaborates on the current status of HCC treatment, outlining the most recent clinical study results and novel approaches.

Association of adverse events and quality of life in patients with unresectable hepatocellular carcinoma

PURPOSE

Hepatocellular carcinoma (HCC) is the third-leading cause of cancer-related deaths globally. Patients are often diagnosed with advanced disease, in which systemic and locoregional therapies are commonly used as first-line treatment. Such treatments can cause adverse events (AEs) that negatively affect quality of life (QoL), which is particularly undesirable where prognosis is poor. The aim of the present study was to evaluate the impact of common AEs on QoL in patients with HCC.

METHODS

Data from the SARAH randomized controlled trial (RCT) were analyzed. Given the large number of distinct AEs that occurred in the trial, AEs were grouped as in the SARAH trial and prioritized using principal component analysis (PCA). Linear mixed-effects models were then applied with age, ECOG status, and AEs as predictors of the QoL change as measured with the EORTC Core Quality of Life Questionnaire (QLQ-C30).

RESULTS

The PCA resulted in the selection of 28 AEs for inclusion in the linear mixed-effects models. Of the 28 AEs, diarrhea, decreased appetite, abdominal pain, and palmar-plantar erythrodysesthesia syndrome (hand-foot syndrome) were significant drivers of reductions in QoL as measured using the QLQ-C30 global health status scale. Diarrhea, abdominal pain, and hand-foot syndrome were also significant drivers of reduced QoL outcomes.

CONCLUSION

The present analysis showed that diarrhea, decreased appetite, abdominal pain, and palmar-plantar erythrodysesthesia were significantly associated with reduced QoL in patients with unresectable HCC. Reducing the incidence and/or severity of these AEs should therefore be a key focus when selecting the optimal treatments for these patients.

The assessment of impaired liver function and prognosis in hepatocellular carcinoma

INTRODUCTION

The impairment of liver function strongly limits the therapeutic options for hepatocellular carcinoma (HCC), and the assessment of liver function is key to finding the appropriate therapy for patients suffering from this disease. Furthermore, preexisting liver dysfunction has a negative impact on the prognosis of patients in addition to the malignant potential of HCC. Hence, defining the optimal treatment of patients with HCC requires a comprehensive examination with liver function being a crucial part of it.

AREAS COVERED

This review will provide an overview of the currently existing methods for evaluating the liver function in patients with HCC. Assessment of liver function includes scoring systems but also functional and technical methods. In addition, the role of these tests in different treatment facilities such as liver resection, transplantation, interventional and systemic therapy is summarized.

EXPERT OPINION

A comprehensive pretherapeutic assessment of the liver function includes laboratory-based scoring systems, as well as imaging- and non-imaging-based functional tests. Combining diverse parameters can help to improve the safety and efficacy of HCC therapy particularly in patients with compromised liver function. Future research should focus on optimizing pretherapeutic assessment recommendations for each therapy.

Current Treatment Paradigm and Approach to Advanced Hepatocellular Carcinoma

Hepatocellular carcinoma (HCC) is one of the most common forms of primary liver cancer worldwide. Herein, we present a review article that provides a broad overview of the current landscape of HCC, including the etiology, potential risk factors, and molecular pathways that can serve as potential therapeutic targets. The risk factors tend to vary depending on the geographic distribution; hepatitis B-induced cirrhosis and HCC occur more frequently in Asia and Sub-Saharan Africa, whereas metabolic disorders are the culprits in Western Europe and the Americas. The exact molecular alterations that drive hepatocarcinogenesis have yet to be elucidated; however, a complex interplay exists between oxidative stress and chronic inflammation. Diagnostic modalities such as tri-phasic MRI or CT also have distinct patterns for HCC, which aid significantly in diagnosis. Furthermore, the review aims to highlight treatment strategies, including transplantation, locoregional radiation therapies, and interventional radiological techniques such as chemotherapy or radioembolization. Finally, systemic therapies will be discussed, taking advantage of molecular pathways that influence cellular proliferation and survival as well as immunotherapy.

Sequencing of systemic therapy in unresectable hepatocellular carcinoma: A systematic review and Bayesian network meta-analysis of randomized clinical trials

PURPOSE

For patients with advanced or unresectable hepatocellular carcinoma (HCC), safe and effective therapies are urgently needed to improve their long-term prognosis. Although the guidelines recommend first-line treatments such as sorafenib, lenvatinib, and atezolizumab in combination with bevacizumab (T+A) and second-line treatments such as regorafenib, the efficacy comparison between drugs is lacking, that is, a treatment is not recommended as the optimal or alternative choice for a specific patient population. Therefore, we will conduct a high-quality network meta-analysis based on Phase III randomized controlled trials (RCTs) to systematically evaluate and compare overall survival (OS), progression-free survival (PFS), objective response rate (ORR), and serious adverse events (SAE) of different treatment protocols in the context of first-line and second-line therapies, which are critical for clinical decision making and prognostic improvement in advanced HCC patients.

METHODS

The studies of interest were Phase III RCTs evaluating the efficacy or safety of first- or second-line therapies in patients with unresectable or advanced HCC. Literature published in English from the four databases of PubMed, Embase, Cochrane Library, and Web of Science was comprehensively searched from the inception to May 23, 2022. Outcomes of interest included OS, PFS, ORR, and SAE. A league table was developed to show the results of the comparison between different treatments. A histogram of cumulative probability was drawn to discuss the ranking probability of treatments based on different outcomes. The effectiveness and safety of various treatments were comprehensively considered and the two-dimensional diagram was plotted to guide clinical practice. The Gemtc package in R Studio was used for network meta-analysis in a Bayesian framework.

RESULTS

The results showed that HAIC-FO was superior to T+A regimen, regardless of OS, PFS or ORR. TACE combined with lenvatinib performed better than T+A in PFS, and ORR. In addition to the T+A regimen, Sintilimab combined with IBI305 and camrelizumab combined with apatinib were also associated with longer OS, PFS, and ORR, and their SAE incidence was not higher than that of T+A, especially for camrelizumab combined with apatinib, its safety was better than that of T+A regimen. There were no new treatments or combinations that were more effective than regorafenib. It was important to note that for PFS, the efficacy of apatinib and cabozantinib was not statistically different from that of regorafenib, so these two treatments could be used as alternative treatment options in cases where regorafenib was not tolerated or treatment failed.

CONCLUSIONS

We conducted a network meta-analysis to evaluate the efficacy and safety of multiple treatment modalities by integrating the results of direct and indirect comparisons. This study included high-quality multicenter Phase III RCTs, collated and summarized all treatments involved in advanced or unresectable HCC in first-line and second-line settings, and compared with T+A and regorafenib, respectively, and ranked based on efficacy and safety to support clinical decision making.

Radioembolization of HCC and secondary hepatic tumors: a comprehensive review

Transarterial radioembolization (TARE), also called Selective Internal Radiation Therapy (SIRT), has emerged as an effective locoregional therapy for primary and secondary hepatic tumors, utilizing yttrium-90 (Y90) microspheres and other agents such as holmium-166 and rhenium-188. TARE has various applications in the management of HCC across different BCLC stages. Radiation segmentectomy, which involves administering high doses of Y90 (>190 Gy), can be both curative and ablative, achieving complete necrosis of the tumor. In contrast, radiation lobectomy involves administering a lower dose of Y90 (80-120 Gy) as a neoadjuvant treatment modality to improve local control and induce future liver remnant (FLR) hypertrophy in patients who are planned to undergo surgery but have insufficient FLR. Modified radiation lobectomy combines both techniques and offers several advantages over portal vein embolization (PVE). Y90 is also used in downstaging HCC patients outside liver transplantation criteria, as well as bridging those awaiting liver transplantation (LT). Multiple studies and combined analyses were described to highlight the outcomes of TARE and compare it with other treatment modalities, including TACE and sorafenib. Additionally, the review delves into the efficacy and safety of radioembolization in managing metastatic colorectal cancer and other metastatic tumors to the liver. Recent studies have emphasized the role of personalized dosimetry for improved outcomes, and thus we described the different methods used for this purpose. Pretherapy imaging, estimating lung shunt, selection of therapeutic radionuclides, adverse effects, and cost-effectiveness were all discussed as well.

Impact of IL-8 on survival after TARE in HCC: a comprehensive investigation and external validation from the SORAMIC trial

PURPOSE

In the treatment of hepatocellular carcinoma (HCC) with transarterial radioembolization (TARE), identifying reliable biomarkers for predicting survival outcomes remains a critical challenge. We aimed to address this gap by investigating the significance of serum cytokines associated with inflammation as potential biomarkers for the selection of patients for TARE.

METHODS

Our retrospective study involved 161 patients diagnosed with HCC who underwent Y90 radioembolization at our medical center between 2010 and 2020. Serum samples from a subset of 78 patients were retrospectively analyzed to determine the concentrations of pro-inflammatory cytokines. The results from the prospective SORAMIC trial were used for independent validation.

RESULTS

With a median overall survival of 36 weeks (range 4-436), our study showed the strongest correlation between 12-week survival and IL-8 levels before treatment (p < 0.001), while other relevant interleukins, interferon-α2, INF-γ, TNF-α and MCP-1 were not associated with survival. IL-8 levels below the cut-off of 190 pg/mL were significantly associated with increased 12-week and 24-week survival, with hazard ratios of 19.01 (95% CI: 2.29-157.89) and 2.57 (95% CI: 1.05-6.31), respectively (p = 0.006 and p = 0.039, respectively). In the adjusted multivariate analysis, the 190 pg/mL cut-off for IL-8 remained independently associated with 12- (p = 0.011) and 24-week survival (p = 0.039). Similarly, the SORAMIC population showed a strong association between IL-8 levels and 36-week survival (p = 0.03).

CONCLUSION

Our study emphasizes the pivotal role of IL-8 as a valuable parameter, demonstrating its potential for predicting treatment outcomes and assessing liver function in patients with HCC undergoing TARE. The robustness of these findings warrants further validation.

Locoregional Therapies for Hepatocellular Carcinoma: A Systematic Review and Meta-Analysis

Importance

Several locoregional therapies (LRTs) for nonmetastatic hepatocellular carcinoma (HCC) are available; however, a global comparison of the relative efficacy of each is needed.

Objective

To conduct a systematic review and direct, pairwise meta-analytic comparison of all identified randomized clinical trials evaluating the treatment of nonmetastatic HCC.

Data Sources

A comprehensive search of PubMed and the proceedings of the American Society of Clinical Oncology and American Society for Radiation Oncology annual meetings from January 1, 2010, to November 1, 2023, was performed.

Study Selection

Randomized clinical trials using a form of LRT (surgery with or without adjuvant therapy, radiofrequency ablation [RFA], microwave ablation [MWA], radiotherapy [RT], hepatic arterial infusion chemotherapy [HAIC], transarterial bland embolization [TAE], transarterial chemoembolization [TACE], or transarterial radioembolization [TARE]).

Data Extraction and Synthesis

Study eligibility and data extraction were each reviewed by 2 authors independently. Random-effects meta-analyses were used to compare treatment categories.

Main Outcomes and Measures

Progression-free survival (PFS) was the primary outcome; overall survival (OS) was the secondary outcome.

Results

Forty randomized clinical trials reporting on comparative outcomes of 11 576 total patients with localized HCC treated with LRT were included. The median follow-up was 30.0 (IQR, 18.5-40.8) months. Direct pooled comparisons between treatment classes suggested improved outcomes for surgery combined with adjuvant therapy over surgery alone (PFS: hazard ratio [HR], 0.62 [95% CI, 0.51-0.75]; P < .001; OS: HR, 0.61 [95% CI, 0.48-0.78]; P < .001), surgery over RFA (PFS: HR, 0.74 [95% CI, 0.63-0.87]; P < .001; OS: HR, 0.71 [95% CI, 0.54-0.95]; P = .02), RT over TACE (PFS: HR, 0.35 [95% CI, 0.21-0.60]; P < .001; OS: HR, 0.35 [95% CI, 0.13-0.97]; P = .04), and HAIC over TACE (PFS: HR, 0.57 [95% CI, 0.45-0.72]; P < .001; OS: HR, 0.58 [95% CI, 0.45-0.75]; P < .001). No substantial heterogeneity was noted for any pairwise comparison with the exception of RT-based regimens compared with tyrosine kinase inhibitor therapy.

Conclusions and Relevance

The findings of this systematic review and direct, pairwise meta-analysis suggest that all LRTs are not equivalent for the treatment of localized HCC. The efficacy of LRTs appears hierarchical, with surgery-based management outcomes associated with the best treatment outcomes and embolization-based treatment options associated with the worst treatment outcomes.

Yttrium-90 radioembolization treatment strategies for management of hepatocellular carcinoma

As the third leading cause of cancer-related deaths worldwide, hepatocellular carcinoma (HCC) represents a significant global health challenge. This paper provides an introduction and comprehensive review of transarterial radioembolization (TARE) with Yttrium-90 (Y90), a widely performed transcatheter procedure for HCC patients who are not suitable candidates for surgery. TARE involves the targeted delivery of radioactive microspheres to liver tumors, offering a promising treatment option for managing HCC across various stages of the disease. By evaluating Y90 TARE outcomes across early, intermediate, and advanced stages of HCC, the review aims to present a thorough understanding of its efficacy and safety. Additionally, this paper highlights future research directions focusing on the potential of combination therapies with systemic and immunotherapies, as well as personalized treatments. The exploration of these innovative approaches aims to improve treatment outcomes, reduce adverse events, and provide new therapeutic opportunities for HCC patients. The review underscores the importance of ongoing research and clinical trials to optimize TARE further and integrate it into comprehensive HCC treatment paradigms.

New frontiers in radioembolization

Radioembolization is a locoregional transarterial therapy that combines radionuclide and micron-sized beads to deliver radiation internally to the target tumors based on the arterial blood flow. While initially developed as a palliative treatment option, radioembolization is now used for curative intent treatment, neoadjuvant therapy, and method to downstage or bridge for liver transplant. Radioembolization has become increasingly utilized and is an important therapeutic option for the management of hepatocellular carcinoma and liver metastasis. This article provides an overview of the techniques, challenges, and novel developments in radioembolization, including new dosimetry techniques, radionuclides, and new target tumors.

Construction and validation of a nomogram for predicting cancer-specific survival in middle-aged patients with advanced hepatocellular carcinoma: A SEER-based study

Hepatocellular carcinoma is the predominant form of primary liver cancer and is the leading cause of cancer-related death. The aim of this study was to construct a nomogram to predict cancer-specific survival (CSS) in middle-aged patients with advanced hepatocellular carcinoma. Clinical data were downloaded from the Surveillance, Epidemiology and End Results (SEER) database for middle-aged patients diagnosed with advanced hepatocellular carcinoma (AJCC stage III and IV) from 2000 to 2019. The patients were randomized in a 7:3 ratio into training cohort and validation cohort. Univariate and multivariate Cox regression analyses were performed in the training cohort to screen for independent risk factors associated with cancer-specific survival for the construction of nomogram. The nomogram was examined and evaluated using the consistency index (C-index), area under the curve (AUC), and calibration plots. The clinical application value of the model was evaluated using decision curve analysis (DCA). A total of 3026 patients were selected, including 2244 in the training cohort and 962 in the validation cohort. Multivariate analysis revealed gender, marital status, American Joint Committee on Cancer (AJCC) stage, tumor size, bone metastasis, lung metastasis, alpha-fetoprotein (AFP) level, surgery, radiotherapy, chemotherapy as independent risk factors, which were all included in the construction of the nomogram. In the training cohort, the AUC values were 0.74 (95% CI: 0.76-0.72), 0.78 (95% CI: 0.82-0.75), and 0.82 (95% CI: 0.86-0.78) at 1-, 3-, and 5-year CSS, respectively. The calibration plots showed good consistency between the actual and predicted values. The DCA curves indicated that the nomogram model could more accurately predict CSS at 1-, 3-, and 5-year in middle-aged patients with advanced hepatocellular carcinoma compared with the AJCC staging system. Highly similar results to the training cohort were also observed in the validation cohort. In the risk stratification system, good differentiation was shown between the 2 groups, and Kaplan-Meier survival analysis indicated that surgery could prolong patient survival. In this study, we developed a nomogram and risk stratification system for predicting CSS in middle-aged patients with advanced hepatocellular carcinoma. The prediction model has good predictive performance and can help clinicians in judging prognosis and clinical decision making.

Survival Outcomes Among Patients With Hepatocellular Carcinoma in a Large Integrated US Health System

Importance

Hepatocellular carcinoma (HCC) is the leading oncologic cause of death among patients with cirrhosis, but large studies examining mortality trends are lacking.

Objective

To evaluate survival among patients with HCC in one of the largest integrated health care systems in the US.

Design, Setting, and Participants

This retrospective cohort study included 3441 adult patients who received a diagnosis of HCC between January 1, 2006, and December 31, 2019, with end of follow-up on December 31, 2020. The study period was further categorized as era 1, defined as 2006 to 2012, and era 2, defined as 2013 to 2019. Statistical analysis was conducted from January 2021 to June 2024.

Exposures

Patient demographic characteristics and disease factors.

Main Outcomes and Measures

All-cause and HCC-specific mortality were used as primary end points, and survival probabilities were estimated using the Kaplan-Meier method. Cox proportional hazards regression analyses were adjusted for age at diagnosis, sex, race and ethnicity, cause of disease, Barcelona Clinic Liver Cancer (BCLC) stage, alpha-fetoprotein level, and treatment type.

Results

Of 3441 patients with HCC, 2581 (75.0%) were men, and the median age was 65 years (IQR, 58-73 years). A total of 1195 patients (34.7%) received curative treatment, 1374 (39.9%) received noncurative treatment, and 872 (25.3%) received no treatment. During the study period, 2500 patients (72.7%) experienced all-cause mortality, and 1809 (52.6%) had HCC-specific mortality. In multivariable analysis, being 70 years of age or older (adjusted hazard ratio [AHR], 1.39; 95% CI, 1.22-1.59), male sex (AHR, 1.20; 95% CI, 1.07-1.35), BCLC stage C or D (AHR, 2.40; 95% CI, 2.15-2.67), increasing alpha-fetoprotein level (vs <20 ng/mL; 20-99 ng/mL: AHR, 1.20; 95% CI, 1.04-1.38; ≥1000 ng/mL: AHR, 2.84; 95% CI, 2.45-3.25), noncurative treatment (AHR, 2.51; 95% CI, 2.16-2.90), and no treatment (AHR, 3.15; 95% CI, 2.64-3.76) were associated with higher all-cause mortality, while Asian or Other Pacific Islander race and ethnicity (vs non-Hispanic White; AHR, 0.76; 95% CI, 0.65-0.88) was associated with lower all-cause mortality. Survival improved in diagnosis era 2 (2013-2019; n = 2007) compared with diagnosis era 1 (2006-2012; n = 1434).

Conclusions and Relevance

This large, racially and ethnically diverse cohort study of patients with HCC found improving survival over time, especially among individuals with early-stage HCC receiving potentially curative treatments. This study highlights the importance of surveillance for detection of HCC at early stages, particularly among groups at risk for poorer outcomes.

Co-relation of Portal Vein Tumour Thrombus Response With Survival Function Following Robotic Radiosurgery in Vascular Invasive Hepatocellular Carcinoma

Background/aims

The aim of this study was to prospectively evaluate stereotactic body radiotherapy (SBRT) with robotic radiosurgery in hepatocellular carcinoma patients with macrovascular invasion (HCC-PVT).

Materials and methods

Patients with inoperable HCC-PVT, good performance score (PS0-1) and preserved liver function [up to Child-Pugh (CP) B7] were accrued after ethical and scientific committee approval [Clinical trial registry-India (CTRI): 2022/01/050234] for treatment on robotic radiosurgery (M6) and planned with Multiplan (iDMS V2.0). Triple-phase contrast computed tomography (CT) scan was performed for contouring, and gross tumour volume (GTV) included contrast-enhancing mass within main portal vein and adjacent parenchymal disease. Dose prescription was as per risk stratification protocol (22-50 Gy in 5 fractions) while achieving the constraints of mean liver dose <15 Gy, 800 cc liver <8 Gy and the duodenum max of <24 Gy). Response assessment was done at 2 months' follow-up for recanalization. Patient- and treatment-related factors were evaluated for influence in survival function.

Results

Between Jan 2017 and May 2022, 318 consecutive HCC with PVT patients were screened and 219 patients were accrued [male 92%, CP score: 5-7 90%, mean age: 63 years (38-85 yrs), Cancer of the Liver Italian Program <3: 84 (40%), 3-6117 (56%), infective aetiology 9.5%, performance status (PS): 0-37%; 1-56%]. Among 209 consecutive patients accrued for SBRT treatment (10 patients were excluded after accrual due to ascites and decompensation), 139 were evaluable for response assessment (>2 mo follow-up). At mean follow-up of 12.21 months (standard deviation: 10.66), 88 (63%) patients expired and 51 (36%) were alive. Eighty-two (59%) patients had recanalization of PVT (response), 57 (41%) patients did not recanalize and 28 (17%) had progressive/metastatic disease prior to response evaluation (<2 months). Mean overall survival (OS) in responders and non-responders were 18.4 [standard error (SE): 2.52] and 9.34 month (SE 0.81), respectively (P < 0.001). Mean survival in patients with PS0, PS1 and PS2 were 17, 11.7 and 9.7 months (P = 0.019), respectively. OS in partial recanalization, bland thrombus and complete recanalization was 12.4, 14.1 and 30.3 months, respectively (P-0.002). Adjuvant sorafenib, Barcelona Clinic Liver Classification stage, gender, age and RT dose did not influence response to treatment. Recanalization rate was higher in good PS patients (P-0.019). OS in patients with response to treatment, in those with no response to treatment, in those who are fit but not accrued and in those who are not suitable were 18.4, 9.34, 5.9 and 2.6 months, respectively (P-<0.001). Thirty-six of 139 patients (24%) had radiation-induced liver disease (RILD) [10 (7.2%) had classic RILD & 26 (19%) had non-classic RILD]. Derangement in CP score (CP score change) by more than 2 was seen in 30 (24%) within 2-month period after robotic radiosurgery. Eighteen (13%) had unplanned admissions, two patients required embolization due to fiducial-related bleeding and 20 (14%) had ascites, of which 9 (6%) patients required abdominocentesis.

Conclusion

PVT response or recanalization after SBRT is a statistically significant prognostic factor for survival function in HCC-PVT.

Transarterial Radioembolization (TARE) Global Practice Patterns: An International Survey by the Cardiovascular and Interventional Radiology Society of Europe (CIRSE)

PURPOSE

An international survey was conducted by the Cardiovascular Interventional Radiological Society of Europe (CIRSE) to evaluate radioembolization practice and capture opinions on real-world clinical and technical aspects of this therapy.

MATERIALS AND METHODS

A survey with 32 multiple choice questions was sent as an email to CIRSE members between November and December 2022. CIRSE group member and sister societies promoted the survey to their local members. The dataset was cleaned of duplicates and entries with missing data, and the resulting anonymized dataset was analysed. Data were presented using descriptive statistics.

RESULTS

The survey was completed by 133 sites, from 30 countries, spanning 6 continents. Most responses were from European centres (87/133, 65%), followed by centres from the Americas (22/133, 17%). Responding sites had been performing radioembolization for 10 years on average and had completed a total of 20,140 procedures over the last 5 years. Hepatocellular carcinoma treatments constituted 56% of this total, colorectal liver metastasis 17% and cholangiocarcinoma 14%. New sites had opened every year for the past 20 years, indicating the high demand for this therapy. Results showed a trend towards individualized treatment, with 79% of responders reporting use of personalized dosimetry for treatment planning and 97% reporting routine assessment of microsphere distribution post-treatment. Interventional radiologists played an important role in referrals, being present in the referring multi-disciplinary team in 91% of responding centres.

CONCLUSION

This survey provides insight into the current state of radioembolization practice globally. The results reveal the increasing significance placed on dosimetry, evolving interventional techniques and increased technology integration.

Portal vein tumor thrombosis in hepatocellular carcinoma patients: Is it the end?

Hepatocellular carcinoma (HCC) is the sixth most prevalent form of cancer globally and the third leading cause of cancer-related mortality. The incidence of portal vein tumor thrombosis (PVTT) in HCC patients is 21% at one year and 46% at three years. The presence of PVTT has consistently been associated with a poor prognosis for HCC patients over the past decades. Notably, HCC prognosis is influenced not only by the presence of PVTT but also by the degree or extent of PVTT. Currently, there is a lack of global consensus or established protocols regarding the optimal management of HCC with associated PVTT. The Barcelona Clinic for Liver Cancer classifies HCC patients with PVTT as stage C, indicating an advanced stage, and limiting treatment recommendations for these patients to systemic therapy. In recent years, there has been an increase in the availability of therapeutic options for HCC patients with PVTT. Treatment modalities include systemic therapy, transarterial chemoembolization, surgical resection, stereotactic body radiotherapy, transarterial radioembolization, and liver transplantation. An ideal therapy for each patient necessitates a multidisciplinary approach. This review article presents the latest updates in managing HCC patients with PVTT.

Multidisciplinary Delphi Consensus on Safety of Combining Transarterial Radioembolization with Yttrium-90 Microspheres with Systemic Anticancer Agents for the Treatment of Liver Malignancy

PURPOSE

To provide guidance, via multidisciplinary consensus statements, on the safety interactions between systemic anticancer agents (such as radiosensitizing chemotherapy, immunotherapy, targeted therapy, and peptide receptor radionuclide therapy) and transarterial radioembolization (TARE) with yttrium-90 (90Y)-labeled microspheres in the treatment of primary and metastatic liver malignancies.

MATERIALS AND METHODS

A literature search identified 59 references that informed 26 statements on the safety of 90Y TARE combined with systemic therapies. Modified Delphi method was used to develop consensus on statements through online anonymous surveys of the 12 panel members representing the fields of interventional radiology, medical oncology, surgical oncology, hepatology, and pharmacy, focusing on hepatocellular carcinoma (HCC), metastatic colorectal cancer (mCRC), neuroendocrine tumors, metastatic breast cancer, and intrahepatic cholangiocarcinoma.

RESULTS

High-level evidence was limited. Level 1 data in patients with mCRC suggest that some radiosensitizing chemotherapies (eg, oxaliplatin) require temporary dose reduction when used concomitantly with 90Y TARE, and some targeted therapies (eg, vascular endothelial growth factor inhibitors and antiangiogenic tyrosine kinase inhibitors) should be avoided for at least 4 weeks before 90Y TARE. In patients with HCC, the feasibility of 90Y TARE and immunotherapy has been demonstrated with Level 4 evidence. Data are more limited for other primary and secondary liver malignancies, and consensus statements were driven by expert opinion (Level 5).

CONCLUSIONS

Given the absence of evidence-based guidelines on the safety of 90Y TARE in combination with systemic anticancer therapy, these consensus statements provide expert guidance on the potential risks when considering specific combinations.

Outcome of Transarterial Radioembolization in the Treatment of Hepatocellular Carcinoma: Glass Versus Resin Microsphere

PURPOSE

To compare the treatment outcomes of glass and resin microspheres for the treatment of hepatocellular carcinoma (HCC) and evaluate the prognostic factors that influence the outcomes.

MATERIALS AND METHODS

We retrospectively reviewed 251 consecutive patients who underwent radioembolization for the treatment of HCC at a single tertiary center. Imaging responses after radioembolization were evaluated using the modified Response Evaluation Criteria in Solid Tumors (mRECIST) 1.1. Progression-free survival (PFS) and overall survival (OS) were analyzed using the Kaplan-Meier method. Univariate and multivariate Cox proportional hazard models were used to identify the prognostic factors.

RESULTS

A total of 195 patients were included in this study (glass microsphere, n = 75; resin microsphere, n = 120). The complete and objective response rates were 16.0% and 50.7% in the glass microsphere group and 17.5% and 58.3% in the resin microsphere group, respectively. Median PFS was 241 days in the glass microsphere group and 268 days in the resin microsphere group (p = 0.871). Median OS was 29 months in the glass microsphere group and 40 months in the resin microsphere group (p = 0.669). The only significant prognostic factor was bilobar tumor distribution, which favored resin microspheres (p = 0.023). Procedure-related adverse events occurred more frequently in the resin microsphere group (glass, 2.7% vs. resin, 5.0%; p < 0.001).

CONCLUSION

Glass and resin microspheres for the treatment of HCC did not show a significant difference in survival, though major adverse events occurred more frequently with the use of resin microspheres.

Phase I-IV Drug Trials on Hepatocellular Carcinoma in Asian Populations: A Systematic Review of Ten Years of Studies

Despite advances in the treatment of hepatocellular carcinoma (HCC) over the last few decades, treatment opportunities for patients with HCC remain limited. HCC is the most common form of liver cancer, accounting for approximately 90% of all cases worldwide. Moreover, apart from the current pharmacological interventions, hepatic resection and liver transplantation are the mainstay curative approaches for patients with HCC. This systematic review included phase I, II, III, and IV clinical trials (CTs) and randomized controlled trials (RCTs) on current treatments for patients with HCC in Asian populations (2013-2023). A total of 427 articles were screened, and 184 non-duplicate publications were identified. After screening the titles and abstracts, 96 publications were excluded, and another 28 were excluded after full-text screening. The remaining 60 eligible RCTs/CTs were finally included. A total of 60 clinical trials fulfilled our inclusion criteria with 36 drugs used as monotherapy or combination therapy for HCC. Most studies used sorafenib alone or in combination with any of the treatment regimens. Lenvatinib or atezolizumab with bevacizumab was used for HCC after initial sorafenib treatment. Eighteen studies compared the efficacy of sorafenib with that of other drugs, including lenvatinib, cabozantinib, tepotinib, tigatuzumab, linifanib, erlotinib, resminostat, brivanib, tislelizumab, selumetinib, and refametinib. This study provides comprehensive insights into effective treatment interventions for HCC in Asian populations. The overall assessment indicates that sorafenib, used alone or in combination with atezolizumab and bevacizumab, has been the first treatment choice in the past decade to achieve better outcomes in patients with HCC in Asian populations.