Effect of liver fibrosis on survival in patients with intrahepatic cholangiocarcinoma: a SEER population-based study

Liver Fibrosis Is Associated with Poorer Overall Survival and Higher Recurrence Rate in Patients with Cholangiocarcinoma

INTRODUCTION

Cholangiocarcinoma is the second most common primary liver tumour worldwide with an increasing incidence in recent decades. While the effects of fibrosis on hepatocellular carcinoma have been widely demonstrated, the impact on cholangiocarcinoma remains unclear. The aim of this study was to evaluate the impact of liver fibrosis on overall survival (OS) and disease-free survival (DFS) in patients who have undergone liver resection for cholangiocarcinoma.

METHODS

Eighty patients with cholangiocarcinoma who underwent curatively intended liver surgery between January 2007 and December 2020 were included in this retrospective single-centre study. Clinical and histopathological features were analysed. The primary endpoint was cause-specific survival. Secondary endpoints were DFS and identification of prognostic factors.

RESULTS

The present study shows that the median OS is significantly reduced in patients with fibrosis (p < 0.001). The median OS in patients with fibrosis was three times shorter than in the group without fibrosis. In addition, a significantly shorter DFS was observed in patients with fibrosis (p < 0.002). Multivariate analysis showed that fibrosis is the strongest independent factor with a negative impact on OS and DFS.

CONCLUSION

Liver fibrosis has a significant impact on OS and DFS in patients with cholangiocarcinoma. Patients with known liver fibrosis require thorough perioperative care and postoperative follow-up.

Cirrhosis in intrahepatic cholangiocarcinoma: prognostic importance and impact on survival

CONTEXT

Cholangiocarcinoma (CCA), a malignancy of the biliary tract epithelium is of increasing importance due to its rising incidence worldwide. There is a lack of data on cirrhosis in intrahepatic CCA (iCCA) and how it affects overall survival and prognosis.

OBJECTIVES

The primary objective of this study was to examine if there were differences in survival outcomes between iCCA patients with concomitant cirrhosis and those without cirrhosis.

METHODS

The National Cancer Database (NCDB) was used to identify and study patients with iCCA from 2004 to 2017. The presence of cirrhosis was defined using CS Site-Specific Factor 2 where 000 indicated no cirrhosis and 001 indicated the presence of cirrhosis. Descriptive statistics were utilized for patient demographics, disease staging, tumor, and treatment characteristics. Kaplan-Meier (KM) method with log-rank test and a multivariate logistic regression model was used to assess if the presence of cirrhosis in iCCA was associated with survival status and long-term survival (60 or more months after diagnosis).

RESULTS

There were 33,160 patients with CCA in NCDB (2004-2017), of which 3644 patients were diagnosed with iCCA. One thousand fifty-two patients (28.9%) had cirrhosis as defined by Ishak Fibrosis score 5-6 on biopsy and 2592 patients (71.1%) did not meet the definition for cirrhosis. Although in univariate analyses using KM/log-rank tests showed a survival advantage for non-cirrhotic patients, there was no statistically significant association found between cirrhosis and survival status (OR = 0.82, p = 0.405) or long-term survival (OR = 0.98, p = 0.933) when multivariate analysis was used. iCCA patients with cirrhosis and Stage 1 tumor had the highest median OS (132 months) vs 73.7 months in the non-cirrhotic arm, while patients with stage IV disease who had cirrhosis had half the survival time of those without. Our data thus indicates that the presence of cirrhosis is not an independent prognostic factor for survival.

Association between Immunohistochemistry Markers and Tumor Features and Their Diagnostic and Prognostic Values in Intrahepatic Cholangiocarcinoma

This study investigated the expression of some frequently used immunohistochemistry (IHC) markers. Besides, we evaluated their correlations with the clinical features and outcomes of intrahepatic cholangiocarcinoma (ICC). Patients who underwent surgical removal of the ICC tumors were followed up for 4 years. The paraffin-embedded sections were used to obtain different markers, including CK7, CK19, CK20, CDX2, Glypican3, Hepa1, Ki-67, Villin, and SATB1. Overall survival in relation to IHC marker expression patterns and other clinical characteristics was evaluated by Kaplan-Meier survival curve and log-rank test, followed by the Cox proportional hazard model (to evaluate the relationship between multiple factors and the overall postoperative survival). A total of 122 ICC patients (67 males and 55 females, averagely aged 57.75) were included in this study. There were 44 cases with vascular invasion, 46 cases with lymphatic metastasis, and 13 cases with distant metastasis. CK7 was negatively correlated with lymphatic metastasis; and in distant-metastasis cases, the positive ratio of SATB1 was lower. Interestingly, SATB1 expression indicated a poorer survival, while Villin expression was associated with a better survival. The COX regression analysis showed that female was a protective factor versus male, Villin expression was a strong protective factor, and Ki-67 expression was correlated with a poor survival. Together, IHC markers are associated with tumor features and postoperative survival, especially for SATB1 as a risk factor and Villin as a protective marker, and female ICC patients may have better survival than males.

Impact of Liver Fibrosis on Survival of Patients with Intrahepatic Cholangiocarcinoma Receiving Gemcitabine-Based Chemotherapy

Intrahepatic cholangiocarcinoma (iCCA) is the most frequent subtype of cholangiocarcinoma (CCA), and the incidence has globally increased in recent years. In contrast to surgically treated iCCA, data on the impact of fibrosis on survival in patients undergoing palliative chemotherapy are missing. We retrospectively analyzed the cases of 70 patients diagnosed with iCCA between 2007 and 2020 in our tertiary hospital. Histopathological assessment of fibrosis was performed by an expert hepatobiliary pathologist. Additionally, the fibrosis-4 score (FIB-4) was calculated as a non-invasive surrogate marker for liver fibrosis. For overall survival (OS) and progression-free survival (PFS), Kaplan-Meier curves and Cox-regression analyses were performed. Subgroup analyses revealed a median OS of 21 months (95% CI = 16.7-25.2 months) and 16 months (95% CI = 7.6-24.4 months) for low and high fibrosis, respectively (p = 0.152). In non-cirrhotic patients, the median OS was 21.8 months (95% CI = 17.1-26.4 months), compared with 9.5 months (95% CI = 4.6-14.3 months) in cirrhotic patients (p = 0.007). In conclusion, patients with iCCA and cirrhosis receiving palliative chemotherapy have decreased OS rates, while fibrosis has no significant impact on OS or PFS. These patients should not be prevented from state-of-the-art first-line chemotherapy.