Sutthipongsupa, T. (2026). Epithelioid Angiosarcoma Presenting as a Huge Cystic Mass in the Right Hemithorax: A Rare Case Report and Diagnostic Pitfall. Phetchabun Medical Journal, 5(3), 23–31. retrieved from https://he03.tci-thaijo.org/index.php/PMJ/article/view/4870 (Original work published December 30, 2025)