Racial disparities in secondary metastasis in patients with hepatocellular carcinoma: A 5-year National Inpatient Sample study.

523 Background: Hepatocellular carcinoma (HCC), a primary liver malignancy, is one of the leading causes of cancer-related mortality worldwide. The incidence and outcomes of HCC vary significantly across racial groups. Secondary metastasis, a key factor in disease progression and prognosis, also appears to differ by race, though these disparities remain poorly understood. This study aims to explore how race influences the metastatic progression of HCC, providing valuable insights into potential racial differences in disease outcomes. Methods: A retrospective analysis of National Inpatient Sample (NIS) data from 2016 to 2020 was conducted, identifying adults with HCC using International Classification of Diseases, Tenth Revision (ICD-10) codes, and categorizing them based on the presence of metastasis. The primary outcome was racial differences in organ metastasis. Multivariable logistic regression models were used to adjust for potential confounders and to evaluate the impact of race on all metastatic patterns, with Caucasians as the reference category. Statistical significance was defined as p-values ≤ 0.05. Results: The study cohort included 236,985 adult patients with HCC, of whom 34,875 had secondary metastasis. The cohort was predominantly male (77.37%), with 22.63% female. The racial distribution was 52.61% Caucasian, 19.08% African American, 15.04% Hispanic, and 13.27% from other racial groups. After adjusting for confounders, African American patients had significantly higher odds of lung (aOR 1.42, P<0.001), bone (aOR 1.51, P<0.001), and brain metastasis (aOR 1.47, P=0.02), but lower odds of adrenal gland metastasis (aOR 0.74, P=0.003) compared to Caucasians. Asian/Pacific Islander patients demonstrated increased odds of lung (aOR 2.00, P<0.001) and brain metastasis (aOR 1.95, P=0.02). In contrast, Hispanic patients had lower odds of abdominal lymph node (aOR 0.69, P=0.008) and bone metastasis (aOR 0.83, P=0.007). Conclusions: This study highlights significant racial disparities in the metastatic patterns of hepatocellular carcinoma, emphasizing the need to consider these differences in clinical management and treatment strategies for HCC patients. Further research is required to investigate the underlying causes of these disparities and their impact on long-term survival.