Advances of ultrasound in tumor immunotherapy.

• Ultrasound combined with tumor immunotherapy made encouraging new progress in both basic research and clinical treatment. • Ultrasound can increase the delivery of immunomodulatory substances and enhance the effect of immunotherapy. • Ultrasound can be used to improve the body's immune response to tumors. Immunotherapy has become a revolutionary method for treating tumors, offering new hope to cancer patients worldwide. Immunotherapy strategies such as checkpoint inhibitors, chimeric antigen receptor T-cell (CAR-T) therapy, and cancer vaccines have shown significant potential in clinical trials. Despite the promising results, there are still limitations that impede the overall effectiveness of immunotherapy; the response to immunotherapy is uneven, the response rate of patients is still low, and systemic immune toxicity accompanied with tumor cell immune evasion is common. Ultrasound technology has evolved rapidly in recent years and has become a significant player in tumor immunotherapy. The introductions of high intensity focused ultrasound and ultrasound-stimulated microbubbles have opened doors for new therapeutic strategies in the fight against tumor. This paper explores the revolutionary advancements of ultrasound combined with immunotherapy in this particular field. [ABSTRACT FROM AUTHOR]