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Figure 7 Barcelona Clinic Liver Cancer (BCLC) classification for HCC including estimated incidence and accepted therapeutic options, including potential roles for RT as shown in the blue boxes. (Adapted from: Overview: Where Does Radiation Therapy Fit in the Spectrum of Liver Cancer Local-Regional Therapies) (Shanker et al. 2021).
Is There One Etiology of HCC that Responds Better to Immunotherapy?
Emerging data suggest that immunotherapy might be less effec­tive for NASH-related HCC compared with other etiologies. When data across 1656 patients from three key trials (Finn et al. 2020; Pfister et al. 2021; Yau et al. 2022) were stratified according to underlying etiology of chronic liver disease, survival benefit of PD-1 and PDL-1 targeted immunotherapy was reduced in those with NASH compared with other causes (7.1 months vs 14.4 months). This has been thought to be related to the aberrant T-cell activation that occurs in NASH leading to impaired immune surveillance. Despite this, based on the current data, it is not yet recommended in clinical guidelines to consider this in the decision of treating with immunotherapy (Gordan et al. 2020).
First-line Systemic Therapy
Figure 8 Multiple areas of arterial enhancement suggestive of
multifocal HCC ( courtesy of Radiology Department, St George Hospital Australia).
Immunotherapy (Atezolizumab and Bevacizumab)
The combination of atezolizumab (programmed death-ligand 1 antibody) and bevacizumab (anti-vascular endothelial growth
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Figure 9 Filling defect in proximal portal vein (on the left) with expansion of vessel (on the right) consistent with extension into portal vein and associated tumor thrombus ( courtesy of Radiology Department, St George Hospital Australia).
factor) has been approved for first-line therapy of advanced stage HCC following the phase III IM Brave trial (Bruix et al. 2021; Greten et al. 2021; Rimassa and Santoro 2009; Yau et al.
2022) (Table 6). This combination immunotherapy has shown significant improvement in progression-free survival compared with sorafenib monotherapy (19.2 versus 13.4 months, esti­mated HR for death 0.66, 95% CI 0.52–0.85). Largely based on these data, combination atezolizumab and bevacizumab is rec­ommended in Child-Pugh A cirrhotics in non-resectable or advanced HCC who have not received prior systemic therapy, as in our case patient.
Tyrosine Kinase Inhibitors (Sorafenib, Lenvatinib)
First-line tyrosine kinase inhibitors (TKI) (lenvatinib and sorafenib) should be considered for patients that cannot have atezolizumab and bevacizumab combination therapy, due to contraindications (as outlined above). Sorafenib is a multi-targeted, orally active small mole­cule TKI that inhibits Raf kinase and the vascular endo­thelial growth factor receptor (VEGFR) intra-cellular kinase pathway. In fact, it was the first therapy to show an increase in median overall survival (Cheng et al. 2009; Yamashita et al. 2020).
Lenvatinib is an oral multi-kinase inhibitor that targets vascular growth factor receptor, fibrobplast growth factors receptor, platelet-derived growth factors receptor, RET, and KIT. In a subsequent trial comparing lenvatinib with sorafenib, lenvatinib was found to be non-inferior to sorafenib, and pro­gression-free survival was significantly higher in patients receiving lenvatinib compared to sorafenib (Yau et al. 2019). Thus, lenvatinib can use used an alternative first-line TKI to sorafenib.
Second-line Systemic Therapy
Second line treatment is used in patients who have had radio­logical or clinical disease progression on first-line treatment, and whose performance status and liver function are adequate to tolerate it. The choice of subsequent TKIs or immunother­apy is empiric, as there are no comparator trials in patients fail­ing initial treatment.
Immunotherapy (Ipilimumab and Nivolumab, Pembroluzimab)
For patients who have progressed on first-line TKI (lenvatanib, sorafenib) with Child-Pugh A cirrhosis who have not undergone liver transplantation, combination therapy of nivolumab (programmed cell death 1 antibody) and ipilimumab (cytoxic T-lymphocyte associated 4 antibody), or pembroluzimab (programmed cell death 1 antibody) monotherapy is recom­mended. While second-line TKIs have been approved for this group, immune checkpoint inhibitors have a higher objective response rate and a more favorable side effect profile. These ther­apies have been approved by the FDA as second-line treatments for sorafenib-pretreated patients based off encouraging date from key phase II trials (Abou-Alfa et al. 2018; El-Khoueiry et al. 2017; Scheiner et al. 2019; Zhu et al. 2018).
Tyrosine Kinase Inhibitors (Regorafenib, Cabozantanib)
Regorafenib and cabozantanib are multi-kinase inhibitors with a similar mechanism of action to sorafenib, blocking the activity of multiple protein kinases involved in the angiogen­esis and oncogenesis in the tumor microenvironment. In advanced HCC patients with preserved liver function who
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Table 6
Landmark trials leading to FDA approvals for immunotherapy in advanced HCC (El-Khoury et al. 2017; Finn et al. 2020; Finn et al. 2020; Yau
et al. 2022).
Therapy Results Comment
Nivolumab
(dose-escalation vs dose-expansion)
(Checkmate 040)
Pembrolizumab vs
placebo
KEYNOTE-240
Atezolizumab and
bevacizumab vs sorafenib
(IMBRAVE 150)
Nivolumab vs
sorafenib
(Checkmate 459)
– Objective RR by investigator using RECIST criteria was 32%, 27% and 29% in
arms A, B (dose-escalation) and C (dose-expansion) respectively.
– Median overall survival was 22.8 months in arm A, 12.8 months in arm B, and
12.7 months in arm C.
– Median duration of response was 17.5, 22.2 and 16.6 months in arms A, B and
C respectively.
– Overall survival was 13.9 months in the pembrolizumab group compared with
10.6 months in the placebo group.
– Objective response rate was 18.3% in pembrolizumab group compared with
4.4% in placebo group
Primary endpoints
OS
1. – At 6 months OS was 84.8% vs 72.2% – At 12 months OS was 67.2% vs 54.6%
2. PFS was 6.8 months (54.5%) vs 4.3 months (37.2%)
Secondary endpoints
1. Objective RR was 27.3% vs 11.9%
2. Duration of response longer than 6 months was 87.6% vs 59.1%
Primary endpoint
OS was 16.4 months vs 14.7 months.
1.
Additional endpoints
1. PFS was 3.7 months vs 3.8 months
2. Objective response rate was 57% vs 26%
Arm A combination was thought to
be a reasonable second line treatment option due to safety profile, durable response with significant overall response rates in patients previously treated with sorafenib in the first line setting.
Pembrolizumab showed
improvement in overall survival and progression free survival over time in patients previously treated with sorafenib
This combination is now considered
as first line treatment option for patients with advanced unresectable hepatocellular cancer if they have no contraindications.
Nivolumab did not increase the OS
but was considered a safe alternative in patients who had contra-indications to TKIs and anti-angiogenic agents.
have progressed on sorafenib, both have shown to have a survival benefit (Brahmer et al. 2018; Kelley et al. 2017; Rimassa and Santoro 2009). Based on this data, regorafenib and cabozantinib have been approved as second-line treat­ments in patients who have progressed on sorafenib.
Side Effects of Systemic Treatment
Table 7 Side effects of systemic treatment (TKIs and immunotherapy).
Tyrosine kinase inhibitors Immunotherapy
- Hypertension - Skin toxicity
- Palmo-plantar - Colitis erythrodysaesthesia - Endocrinopathies, pneumonitis
- Skin rash - Hepatotoxicity
- Cardiotoxicity
- Anemia, thrombocytopenia - Thromboembolic events
- Nausea, vomiting - Bleeding
- Electrolyte disturbances - Poor wound healing
- Arthralgias - Hypertension
- Pancreatic atrophy - GI perforation
- Sarcopenia - Proteinuria
Specific to VEG-F inhibitors
How Do We Manage Immunotoxicity?
The toxicity profile of immunotherapy must be considered carefully on a case-by-case basis as it leads to a wide range of immune-mediated adverse effects due to impaired self-tol­erance (Table 7). Most immunotherapy-related adverse effects (IRAE) are usually transient, but occasionally they can be severe and life-threatening (Schneider et al. 2021; Thompson et al. 2020). Overall, studies have reported less higher grade toxicity and therefore treatment discontinua­tion with monotherapy (less with PD-1/PDL-1 vs CTLA-4) compared to combination therapy (Pfister et al. 2021).
Multiple international guidelines like ASCO, ESMO, and NCCN generally recommend a similar management plan for treating IRAEs as mentioned below:
– Management varies according to organ system affected, in general, ICPi treatment can be continued with close moni­toring for most grade 1 toxicities, except for some of the neuro­logic, hematologic, and cardiac toxicities.
– ICPi therapy should most likely be suspended for most grade 2 toxicities, with consideration of restarting treatment when symptoms have reverted to grade 1 or less. Corti­costeroids may be considered for grade 2 toxicities. For
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endocrinopathies immunotherapy should be withheld until adequate hormone replacement therapy has been initiated and treatment can be restarted after the acute symptoms have resolved. For patients with hypophysitis or adrenal insuffi­ciency treatment can be restarted after adequate adrenal glu­cocorticoid replacement.
– Grade 3 toxicities generally warrant cessation of ICPis and the initiation of high-dose corticosteroids should not be delayed (prednisone 1 to 2mg/kg/d or methylprednisolone 1 to 2mg/kg/d). Corticosteroids can be slowly tapered over a period of at least 4 to 6 weeks and in some refractory cases where there is need for ongoing corticosteroid therapy, agents like inflix­imab, Mycophenolate or other immunosuppressive therapies can be considered.
– In general, permanent cessation of ICPis is recommended with all grade 4 toxicities, except for most of the endocrinopa­thies that can be managed with adequate hormone replacement.
Re-treatment after previous toxicity can be considered and is reasonably safe in most patients after having a risk benefit discussion and the decision to retreat also depends on multiple factors like severity of adverse effects, response to corticoste­roid therapy, disease response to initial immunotherapy and availability of other alternative treatment options (Hui et al. 2013; Schneider et al. 2021).
What Are the Challenges of Palliative Care in HCC?
The nature of HCC necessitates the early introduction of PC. It is a complex disease underscored by an unpredictable course (Hope and Morrison 2011). This is largely attributable to the fact that it frequently occurs in the context of underlying end­stage liver disease (ESLD), with 85–90% of cases transpiring in this manner (Tarao et al. 2019). Accordingly, the health trajec­tory of patients presenting with both is unpredictable, charac­terized by episodic and acute exacerbations, as well as frequent hospitalizations and stabilizations (Befeler and Di Bisceglie
2002). Further, because of this underlying ESLD, HCC patients suffer from the symptoms of both liver failure and cancer (Graf and Stengel 2021). The former is characterized by the development of jaundice, ascites, variceal hemorrhage, and hepatic encephalopathy (Befeler and Di Bisceglie 2002), each with its own unique management challenges and prognostic implications. When combined with the classic constitutional clinical plethora of HCC, encompassing symptoms such as weight loss, anorexia, fever, and malaise (Lubel et al. 2021), coupled with the long and protracted treatment journey (Lubel et al. 2021), patients with this typical dual presentation are subject to severe physical and psychological burden (Bakitas etal. 2009).
Palliative Care
Case: A 74 year old male has a history of alcoholic Child­Pugh C cirrhosis, but did not comply with HCC surveil­lance. He had an incidental finding of multifocal HCC with IVC and portal vein invasion, after he presented with abdominal pain and weight loss. Given poor underlying liver function, he was not for surgery, locoregional treatment, or systemic treatment, so was commenced on best sup­portive treatment pathway in liaison with the palliative care team. He had worsening liver decompensation with progres­sive renal impairment, recurrent ascites and encephalop­athy. He was transferred to a Palliative Care Unit for symptom management given his guarded prognosis, and passed away peacefully a week later.
Palliative care involves addressing and holistically managing the physical, emotional, and spiritual needs of patients and their families or carers as early in the treatment course as possible in order to improve patient quality of life (QoL) and to mitigate suffering (Baumann et al. 2015; Colagrande et al. 2016; Laube et al. 2021). This goal is best achieved in HCC through the PC multidisciplinary team, optimally consisting of specialist PC physicians and nurses, hepatologists, allied healthcare workers (including a social worker, physiotherapist, speech pathologist, occupational therapist, and dietitian), with access to chaplaincy and bereavement counsellors (Lubel et al. 2021).
What Does Palliative Care in HCC Involve?
Importantly, palliative should be delivered congruently with disease-modifying therapy early in the management of HCC (Temel et al. 2010). Several randomized controlled trials (RCTs) studying advanced cancers have supported this (Vanbutsele et al. 2020; Woodrell et al. 2018; Zimmermann et al. 2014).
The services provided by PC fall under four main headings, including symptom management, care coordination, psychoso­cial support, and decisional support. Their implementation should extend across all stages of HCC including the early stages, when curative treatments are still available (Table 8) (Lubel et al. 2021).
Importantly, these four domains have a significant role in mitigating the strenuous patient experience for those with HCC (Tarao et al. 2019, 182). Symptom management should include pharmacological control of pain, and choice of analgesia should take into consideration degree of hepatic function, and co-existent complications such as hepatic encephalopathy or hepatorenal syndrome. Given the unpre­dictable course of HCC, advanced care planning should be instituted early. Psychosocial support is important given the severe psychological burden of HCC, and clinicians should work to identify religious and spiritual needs of the patient and their families, and refer to support groups when appropriate.
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Table 8 Potential role of palliative care across all stages of HCC (Adapted from Lubel et al. 2021).
HCC stage
Early (BCLC Stage
0-A)
Single nodule <2 cm,
PST 0, Child-Pugh A
Intermediate (BCLC
Stage B)
Multinodular, PS 0,
Child-Pugh A/B
Advanced (BCLC Stage C)
Portal invasion, N1, M1,
PS 1–2, Child-Pugh B
Late-stage/terminal
(BCLC Stage D)
PST >2, Child-Pugh C
HCC therapy options Typical symptoms Role of palliative care in each stage
- Liver resection
- Liver transplant
- Ablation (RF/PEI)
- TACE - Adverse effects of treatment including nausea,
- Systemic chemotherapy (e.g. Sorafenib)
- Best supportive care (appropriate palliative care)
- Adverse effects of treatment including pain, infection, fever
vomiting, pain, fever, fatigue
- Local symptoms of primary tumor
- Extrahepatic symptoms
- Adverse effects of treatment (skin reaction, diarrhea, anorexia, fatigue)
- Local symptoms of primary tumor
- Extrahepatic symptoms
- Local symptoms of primary tumor
- Extrahepatic symptoms (fatigue, anorexia)
- Liver failure (jaundice, ascites, and encephalopathy)
- Metastatic disease (symptoms related to system of metastases, e.g. dyspnea, pain)
Key Take Home Messages
 • HCC surveillance (with liver US +/– AFP every 6 months) recommended to be undertaken in all cirrhotics, as well as in non-cirrhotics with chronic HBV infection who are at increased risk of HCC.
 • It is recommended that the BCLC staging should be used as the framework for HCC management; and the management choice should take into account the individual’s liver function, functional status as well as psychosocial circumstances.
 • The management of HCC ideally should be determined by a multidisciplinary team to optimize patient care.
 • Liver resection is a first-line therapy option in suitable patients with HCC where there is preserved liver function, sufficient liver remnant, and absence of significant portal hypertension.
 • Liver transplantation should be considered for patients with HCC within transplant criteria who are not suitable for cura­tive hepatic resection or ablative therapy.
 • Patients with HCC initially beyond transplant criteria may be considered for liver transplantation after successful down­staging to within standard transplant criteria.
 • Ablative therapy and SIRTEX are recommended as a curative locoregional therapy in suitable patients with very early or early (BCLC Stage 0 or A) HCC, or in patients who are not candi­dates for surgery or liver transplantation.
 • SIRT or SBRT may be considered in select patients with intermediate or locally advanced HCC for local tumor control.
- Symptom control
- Disease education
- Advanced care planning and goals of care discussion
- Address the physical, psychosocial, and spiritual needs of patients through symptom control, counseling and chaplain services respectively
- Assistance with decision-making and navigation through treatment pathways
- Symptom control
- End-of-life care
- Provision of resources (e.g. hospice unit and community equipment)
-Family support and bereavement counseling
 • Patients with advanced HCC (BCLC Stage C) or multifocal HCC that is not amenable to curative or locoregional therapy (BCLC Stage B) should be offered systemic therapy, with immunotherapy or multi-kinase inhibitors (sorafenib or lenva­tinib) as first-line therapy options depending on patient’s comorbidities.
 • Patients with incurable HCC should be introduced to sup­portive care services early in their management.
 • Hepatocellular carcinoma (HCC) continues to be an increasing indication for liver transplantation (LTx) in patients with liver cirrhosis.
 • Milan criteria remain a reference in the liver transplant assessment of patients with HCC.
 • There is an increasing role of downstaging procedures per­mitting transplantation in tumors exceeding Milan criteria however no randomized data exists to support any particular modality used in downstaging
What’s not known
 • Liver allocation to patients with HCC remains a great challenge with scoring systems being systematically updated and refined in order to ensure a fair distribution of organs.
 • Prevention of HCC recurrence after LTx continues to be a challenge and the potential preventive role of immunosuppres­sion with mTOR inhibitors need to be established.
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Areas for Further Research
 • Further investigation is required in predicting risk of HCC recurrence following resection, liver transplantation, and locoregional therapies.
 • Neoadjuvant or adjuvant therapies for high risk patients (for example, with lymphovascular invasion) are still under investigation.
 • The role of radiotherapy in the neoadjuvant setting prior to surgical resection or liver transplantation has not yet been outlined.
 • Transarterial embolization in combination with systemic therapy is currently under investigation.
 • There are no clinical or molecular biomarkers established as of yet to predict response to first or second-line systemic treatments. Molecular characterization of the HCC tumor microenvironment are currently under investigation, that may enable the development of biomarkers that can be used in routine clinical practice to predict prognosis and treatment response; as exists in breast and lung malignancy for example.
Trusted Websites for Further Reading
1 EASL Clinical Practice Guidelines: Liver Transplantation: https://easl.eu/wp-content/uploads/2018/10/Liver­Transplantation-English-report.pdf
2
Diagnosis, Staging, and Management of Hepatocellular
Carcinoma: 2018 Practice Guidance by the American Association for the Study of Liver Diseases: https://www.aasld. org/sites/default/files/2022-06/AASLD_2018_HCC_ Guidance_on_Diagnosis%2C_Staging_and_Management_ hep_29913.pdf 3 Milan criteria for liver transplantation: https://www.mdcalc. com/calc/3900/milan-criteria-liver-transplantation 4 Scoring system for liver transplantation in Hepatocellular Carcinoma (METROTICKET PROJECT): http://www.hcc-olt­metroticket.org
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