Elevated serum CA 19–9 level mimicking pancreaticobiliary carcinoma from a hepatic abscess: case report and literature review - Dhingra, Shaurya; Raman, Puneet; Ramsaroop, Taylor; Harrison, Isaiah; Bergsten, Tova; Nusbaum, Erin; Feldman, Lawrence E. (Frontiers in Medicine, 2025)