Current status and novel insights into the role of metastasectomy in the era of immunotherapy.

INTRODUCTION: New perspectives on the role of metastasectomy have emerged along with the advances in cancer immunotherapy. Despite accumulating evidence that encourages the use of immunotherapy in the metastatic setting, current data regarding its combination with surgical resection of secondary lesions, as well as the best timeline and sequence of such a therapeutic approach is limited. AREAS COVERED: We review the currently available literature on the role of metastasectomy in the era of novel immunotherapeutic agents and provide comprehensive evidence from ongoing trials about the available treatment strategies. In metastatic melanoma, immune checkpoint inhibitors (ICIs) play a key role both in the neoadjuvant and adjuvant setting to achieve long-term disease control. In metastatic renal cell carcinoma, investigation is ongoing regarding the emerging role of ICIs before metastasectomy. ICIs have improved outcomes in patients with metastatic colorectal and head and neck cancer. EXPERT OPINION: In the neoadjuvant setting, the high response rates and the durability of responses to immunotherapy may enable the resectability of metastatic lesions. In the adjuvant setting post metastasectomy, immunotherapy constitutes a safe and efficacious approach to support immune tumor surveillance and delay or even prevent disease relapse. Patient participation in relevant clinical trials should be encouraged.