Frontiers in Immunology
Immunotherapy-based salvage therapy in advanced soft tissue sarcoma after first-line chemotherapy: a retrospective single-center analysis with emphasis on undifferentiated pleomorphic sarcoma
Introduction Soft tissue sarcomas (STS) are rare mesenchymal malignancies with limited treatment options in advanced stages. Anthracycline-based chemotherapy remains the standard of care but yields modest outcomes with significant toxicity, underscoring the need for more effective strategies. Methods We retrospectively analyzed 56 patients with advanced STS who received PD-1 inhibitor-based therapy at Tianjin Medical University Cancer Institute and Hospital between January 2021 and January 2026. Treatment regimens …