Abstract

e24077 Background: Cholangiocarcinoma is an adenocarcinoma of the intra- and extrahepatic bile duct epithelial cells. Although cases of cholangiocarcinoma in the US are rare, there is a low 5-year survival rate for these patients. The preferred treatment option for all subtypes is surgical resection. Alternative options include palliative care (PC) treatments such as chemotherapy, radiotherapy and locoregional treatments. There are many obstacles in accurately diagnosing cholangiocarcinoma, including obtaining adequate tumor samples for histology and determining what is malignant vs. benign in patients with primary sclerosing cholangitis (an important risk factor of cholangiocarcinoma). Such delays in diagnosis can lead to delays in treatment, which in turn results in a poor prognosis and worse outcome for patients. To the authors’ knowledge, there is no current study assessing PC disparities in patients with cholangiocarcinoma. Methods: A total of 46,751 patients who had a diagnosis with cholangiocarcinoma were identified utilizing the National Cancer Database (NCDB) ICD-O-3 histology code 8160. The 5-year survival of PC use was analyzed via a Kaplan-Meier curve. Demographic factors (race, biological sex, income, facility type, insurance, geographic location, and Charlson-Deyo co-morbidity score) were studied in relation to the receipt of PC. Results: Approximately 15.16% of our cohort received PC (7,089/46,751). There was a statistically significant difference in the staging of those patients that received palliative care, with 52% of our cohort being stage IV (p < 0.001). The sex of patients who received PC was equally distributed between men and women (51.0% to 49.0%). The majority of PC recipients were white (83.6%) individuals making under $63,000 (69.6%) with a reported Charlson-Deyo score of 0 (64.9%). Many patients who received PC had Medicare (57.6%) and were treated at either an academic/research program (45.4%) or at a comprehensive community cancer program (33.6%). Facility locations were predominantly located in the Mid-South Atlantic and East North Central regions, compared to the Pacific regions (56.3% vs 8.4%), and patients who received PC lived mainly in urban areas (98.2%). The median survival for PC patients was shorter compared to patients that did not receive PC (5.32 months vs 9.23 months). Conclusions: This is one of the most comprehensive studies that identifies the demographic disparities of patients who received PC for cholangiocarcinoma. The typical PC patient is a white individual with Medicare, living in an urban area in the Mid-South Atlantic and East North Central region making under $63,000. By highlighting the disparities that exist, our study can aid clinicians in addressing PC under-utilization in specific demographics to help provide more comprehensive care.

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