Pralsetinib: First Approval.

Pralsetinib (GAVRETO™, Blueprint Medicines Corporation) is a selective rearranged during transfection (RET) inhibitor being developed for the treatment of various solid tumours. RET is a well described proto-oncogene present in multiple cancers including non-small cell lung cancer (NSCLC), papillary thyroid cancer, and medullary thyroid carcinoma (MTC). Pralsetinib was recently granted accelerated approval for the treatment of metastatic RET fusion-positive NSCLC in the USA and is under regulatory review in the USA for RET fusion-positive thyroid cancer and RET mutation-positive MTC; pralsetinib is under regulatory review in the EU for RET fusion-positive NSCLC. This article summarizes the milestones in the development of pralsetinib leading to this first approval.