The NCCN Guidelines for Hepatobiliary Cancers focus on the screening, diagnosis, staging, treatment, and management of hepatocellular carcinoma (HCC), gallbladder cancer, and cancer of the bile ducts (intrahepatic and extrahepatic cholangiocarcinoma). Due to the multiple modalities that can be used to treat the disease and the complications that can arise from comorbid liver dysfunction, a multidisciplinary evaluation is essential for determining an optimal treatment strategy. A multidisciplinary team should include hepatologists, diagnostic radiologists, interventional radiologists, surgeons, medical oncologists, and pathologists with hepatobiliary cancer expertise. In addition to surgery, transplant, and intra-arterial therapies, there have been great advances in the systemic treatment of HCC. Until recently, sorafenib was the only systemic therapy option for patients with advanced HCC. In 2020, the combination of atezolizumab and bevacizumab became the first regimen to show superior survival to sorafenib, gaining it FDA approval as a new frontline standard regimen for unresectable or metastatic HCC. This article discusses the NCCN Guidelines recommendations for HCC.

Cholangiocarcinoma (CCA) is a highly lethal, epithelial cell malignancy that occurs anywhere along the biliary tree and/or within the hepatic parenchyma. CCA displays features of cholangiocyte differentiation and probably arises predominantly from the epithelial cells lining the bile ducts, which are termed cholangiocytes; however, the cancers may also develop from peribiliary glands and hepatocytes, depending on the underlying liver disease and location [1][2][3][4] . These cancers are heterogeneous and are best classified according to the primary, anatomic subtype as intrahepatic CCA (iCCA), perihilar CCA (pCCA) or distal CCA (dCCA) 5,6 (Fig. 1). iCCA is located proximally to the second-order bile ducts within the liver parenchyma, pCCA is localized between the second-order bile ducts and the insertion of the cystic duct into the common bile duct, and dCCA is confined to the common bile duct below the cystic duct insertion. The true incidence of pCCA and iCCA is unclear owing to the extensive misclassification of pCCA as iCCA in national databases 6,7 . In addition, enhanced diagnostic capabilities have enabled increased clinical distinction between carcinoma of unknown primary and iCCA 8,9 . These factors have, in part, contributed to the reported increase in incidence of iCCA over the past two or three decades. Each of the anatomic subtypes is characterized by unique genetic aberrations, clinical presentations and management options 10 . However, many databases categorize both pCCA and dCCA as extrahepatic CCA. Most CCAs are adenocarcinomas and other histological subtypes, such as adenosquamous carcinoma or clear cell carcinoma, are encountered rarely 11 . These cancers are highly desmoplastic and are enmeshed in dense networks of inflammatory cells and matrix termed the tumour immune microenvironment [12][13][14] .The epidemiology of these cancers varies worldwide. Infections with specific trematodes (flatworm parasites, commonly called flukes) are a major cause of CCA in some regions. For example, in Southeast Asia, the liver fluke Opisthorchis viverrini is the leading cause of CCA 15 . CCA occurring secondary to fluke infestation can arise anywhere within the biliary tree and present as any one of the three anatomic subsets. Fluke-related CCA may have a specific pathogenesis, especially genetic aberrations, but the diagnosis and management are not different from non-fluke-related CCA. In the Western world, most patients with CCA do not have an identifiable risk factor, except for some with primary sclerosing cholangitis (PSC) 7,10 . Further insights into the epidemiology, risk factors and biology of CCA are needed to improve its prevention and therapy.In this Primer, we discuss the epidemiology and pathophysiological mechanisms of liver-fluke-related and non-liver-fluke-related CCA and associated risk factors and summarize diagnosis and management of C holangiocarcinoma

PURPOSE To develop an evidence-based clinical practice guideline to assist in clinical decision making for patients with resected biliary tract cancer.METHODS ASCO convened an Expert Panel to conduct a systematic review of the literature on adjuvant therapy for resected biliary tract cancer and provide recommended care options for this patient population.RESULTS Three phase III randomized controlled trials, one phase II trial, and 16 retrospective studies met the inclusion criteria.RECOMMENDATIONS Based on evidence from a phase III randomized controlled trial, patients with resected biliary tract cancer should be offered adjuvant capecitabine chemotherapy for a duration of 6 months. The dosing used in this trial is described in the qualifying statements, while it should be noted that the dose of capecitabine may also be determined by institutional and regional practices. Patients with extrahepatic cholangiocarcinoma or gallbladder cancer and a microscopically positive surgical resection margin (R1 resection) may be offered chemoradiation therapy. A shared decision-making approach is recommended, considering the risk of harm and potential for benefit associated with radiation therapy for patients with extrahepatic cholangiocarcinoma or gallbladder cancer. Additional information is available at www.asco.org/ gastrointestinal-cancer-guidelines.

In 2023, the NCCN Guidelines for Hepatobiliary Cancers were divided into 2 separate guidelines: Hepatocellular Carcinoma and Biliary Tract Cancers. The NCCN Guidelines for Biliary Tract Cancers provide recommendations for the evaluation and comprehensive care of patients with gallbladder cancer, intrahepatic cholangiocarcinoma, and extrahepatic cholangiocarcinoma. The multidisciplinary panel of experts meets at least on an annual basis to review requests from internal and external entities as well as to evaluate new data on current and emerging therapies. These Guidelines Insights focus on some of the recent updates to the NCCN Guidelines for Biliary Tract Cancers as well as the newly published section on principles of molecular testing.

Introduction: Patients living with biliary tract cancer (BTC) experience a decline in healthrelated quality of life (HRQoL). This study aimed to obtain a comprehensive understanding of the patient experience of BTCrelated signs/symptoms and the impacts of these on daily functioning and HRQoL. Methods: Patients with BTC participated in qualitative semi-structured concept elicitation interviews. Signs/symptoms and impacts of BTC were initially explored by targeted literature searches and interviews with five clinicians. Patient interviews were transcribed and coded using qualitative research software. Concept saturation was assessed over five interview waves. A sign/symptom or impact was defined

Purpose Numerous experimental and targeted therapies are under investigation for patients with cholangiocarcinoma (CCA). Objective health‐related quality of life (HRQoL) data for patients receiving these therapies are limited. Methods Patients engaged in the Cholangiocarcinoma Foundation completed two validated HRQoL surveys: Functional Assessment of Cancer Therapy (FACT)‐Hepatobiliary and COmprehensive Score for financial Toxicity (COST). Results Two hundred eight patients were included. Seventy‐five percent had intrahepatic CCA and 57% underwent resection, of which 48% had disease recurrence. Twenty‐two percent enrolled in a clinical trial and 80% underwent molecular profiling, of which 29% received targeted therapy. While patients enrolled in a clinical trial or received targeted therapy reported similar HRQoL compared to those who did not, they reported higher financial toxicity (p = 0.05 and p = 0.01, respectively). Conclusion Enrollment in a clinical trial or receipt of targeted therapy do not affect a patient's physical, emotional, social, or functional well‐being. However, patients report higher financial burden. These therapies are mainly offered in the advanced setting after significant financial strain has been endured and are often only available at large academic centers, creating a physical barrier to access. These findings underscore the need to increase availability and eliminate physical and financial barriers that threaten access and utilization of personalized and progressive therapies.

4084 Background: Treatment of advanced CCA has changed dramatically over the past five years with the advent of molecularly targeted therapy, now approved in the 2nd line and beyond. However, real world utilization of molecular profiling and targeted therapy is still unknown and these data are critical to empower treatment decision-making. Methods: In 2019, the Cholangiocarcinoma Foundation (CCF) and Ciitizen (a wholly owned subsidiary of Invitae Corporation) collaboratively launched a registry platform that directly consents patients and collects comprehensive medical records. De-identified data including clinical characteristics, molecular testing, interventions, and outcomes are extracted and standardized for research use. The data is longitudinal with regularly planned updates; registry participants can be re-engaged to obtain additional data and communicate tailored insights. Results: We quantified the rate of molecular testing, the presence of targetable biomarkers, and the utilization and outcomes on matched targeted therapies for 372 individuals with CCA. 328 (88.2%) individuals had molecular testing, with the identified targetable mutations and matched therapies reported. Of 328 individuals who had molecular testing, 111 (33.8%) individuals had one or more targetable mutations (116 mutations total). Only 46% (51) of individuals with targetable mutations received targeted therapy. Of the 54% (60) individuals with targetable mutations that did not receive any matched therapy, the majority (61.7%, 37) were in early disease or first line of treatment and therefore not yet eligible for targeted therapy. These individuals will be informed that based on their molecular profile, a targeted therapy may be an option, and suggest they discuss with their treating physician. Conclusions: A novel prospectively-maintained database registry for CCA has been formed in collaboration between a patient advocacy organization (CCF) and industry (Invitae). Prevalence of actionable biomarkers was higher than historically expected and may reflect patient utilization bias of the registry platform. Molecular profiling and access to targeted therapeutics remains suboptimal at this time in CCA. Future directions for the registry include identifying and targeting disparities in care and supporting biopharmaceutical development and regulatory decisions. [Table: see text]

277 Background: Patients (pts) with CCA typically present with advanced disease and face a poor prognosis and impaired quality of life (QoL). Despite improvements in therapies, the impact of CCA on pts’ daily lives has been rarely studied. This pt-focused survey explored the diagnostic journey, life impact including work status, QoL and psychosocial impacts of CCA. Methods: Pts with CCA were recruited in partnership with the Cholangiocarcinoma Foundation from Aug 23 through Sept 20, 2019, and were categorized by AJCC stage. Pts participated in a 30-min online survey to assess disease staging, symptoms, demographics, diagnosis journey, daily life impact, mental health, and sexual function. The survey included the validated disease specific European Organization for Research and Treatment of Cancer (EORTC) QLQ-BIL21, the Patient Health Questionnaire-9 (PHQ-9), and the Work Productivity and Activity Impairment (WPAI) questionnaire. Results: Of 1,286 pts invited, 707 (55%) completed the survey (male, 77%; age ≥55 y, 13%; currently employed, 78%; perihilar CCA, 47%; intrahepatic CCA, 41%; distal CCA, 12%; stage 1–2, 22%, stage 3a, 51%, stage 3b–4, 20%, in remission, 4%, unknown stage, 2%). Median duration from symptom onset to CCA diagnosis was 19 months (range, 1–241), and median duration from diagnosis to completing survey was 24 months (0–744). Initial misdiagnosis occurred in 35% of pts (n=247); among whom the most common misdiagnosis was gall bladder cancer (52% [n=129]); misdiagnosis of cancer of unknown origin occurred in 9% of pts (n=21). CCA was most frequently first suspected and diagnosed by oncologists (38% [n=269] and 70% [n=492]); among non-specialty physicians, more first suspected than diagnosed CCA (eg, primary care physicians, 22% [n=156] vs 3% [n=22]). Pts’ primary considerations in treatment decisions were physician judgment (38% [n=272]), QoL (16% [n=111]), time spent in hospital (11% [n=75]), laboratory results (11% [n=79]), other pt experiences (6% [n=42]). On the EORTC QLQ-BIL21, pts reported negative life impact from anxiety (mean [SD], 52.9 [19.2]), tiredness (52.3 [19.3]), and treatment (51.3 [28.8]). On the WPAI, 61% of pts (n=429) reported some, and 28% (n=200) reported considerable impact on work status. On the PHQ-9, 58% (n=408) of pts reported significant impact of depression on daily life, with 72% (n=506) and 25% (n=177) reporting that depression makes daily life somewhat, or very difficult, respectively. Pts also reported considerable or some impact on sexual desire (51% [n=362]; 36% [n=255]) and intimacy (47% [n=332]; 39% [n=273]). Conclusions: Pts with CCA who participated in this survey were mostly <55 y of age and had experienced CCA symptoms for an extended time (2 y) before diagnosis, at which time CCA was often initially misdiagnosed. The burden of CCA symptoms on daily lives, work productivity, and mental health is immense.