Current Role and Status for Intratumoral Injection Therapies in Metastatic Melanoma

Abstract Intratumoral therapies represent a unique avenue for drug development in melanoma as patients often have accessible lesions that are particularly amenable to these approaches. In addition, a majority of intratumoral therapies have focused on stimulating antitumor immune responses, making them a particularly attractive option for use in melanoma. In this review, we describe applications for talimogene laherparepvec, a US Food and Drug Administration–approved intratumoral therapy in melanoma, as well as several classes of intratumoral therapies in development including novel oncolytic viruses, mRNA-based intratumoral injections, and cytokines and other signaling molecules.