Impact of Steatotic Liver Disease on Survival Outcomes Following Resection for HBV/HCV-Related Hepatocellular Carcinoma in Mongolia
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Epidemiology and Biostatistics, Mongolian National University of Medical Sciences, ULAANBAATAR, Mongolia
Popul. Med. 2026;8(Supplement Supplement 1):
ABSTRACT
BACKGROUND:
Hepatocellular carcinoma (HCC) is a major health burden in Mongolia, having the highest incidence, predominantly driven by chronic viral hepatitis. The contribution of metabolic dysfunction-associated steatohepatitis (MASH-HCC) and alcohol-related liver disease (ALD-HCC) is poorly defined. This study aimed to compare the clinicopathological features and outcomes of HCC arising from MASH versus ALD in Mongolian patients.
METHODS:
This was a retrospective cohort study of 980 HCC patients who underwent liver resection at the National Cancer Center of Mongolia (2015–2018). Patients were categorized as ALD-HCC (n=191) based on heavy alcohol use (≥80g/day) or MASH-HCC (n=789) based on metabolic syndrome, with both groups excluding chronic viral hepatitis as the sole etiology. Clinicopathological variables, including demographics, tumor features, and survival, were compared using appropriate statistical tests.
RESULTS:
ALD-HCC patients were significantly younger (mean age 46–60 years) and overwhelmingly male (96.8%). MASH-HCC patients were older (mean age >61 years) and more prevalent in women (55.6%). MASH-HCC demonstrated a more aggressive tumor profile, characterized by a higher frequency of tumors >5 cm (p=0.0045), poorly differentiated tumors (G3−4, p=0.0248), advanced TNM T4 stage (p=0.0009), and large lymphovascular invasion (p<0.0001). Despite the aggressive tumor biology, MASH-HCC had a significantly longer median overall survival (92.6 months vs. 82.0 months, p=0.0206) but also a significantly higher tumor recurrence rate (p<0.0001) compared to ALD-HCC. Notably, high rates of HBV and HCV co-infection were observed in both groups.
CONCLUSIONS:
MASH-HCC and ALD-HCC represent distinct clinical entities in the Mongolian population. While ALD-HCC affects younger men, MASH-HCC is linked to older women and presents with aggressive tumors. The superior initial survival of MASH-HCC is offset by a dramatically higher recurrence rate, underscoring the need for tailored post-resection surveillance strategies for patients with metabolic syndrome. The high prevalence of viral co-infection highlights a "multiple-hit" model of carcinogenesis in this high-incidence region.