FDA OKs Retevmo for Pediatric Thyroid Cancer
FDA has granted Eli Lilly accelerated approval for Retevmo (selpercatinib) for pediatric patients two years of age and older with advanced or metastatic medullary thyroid cancer with a RET mutation, as detected by an FDA-approved test, who require systemic therapy. The therapy was also granted accelerated approval for advanced or metastatic thyroid cancer with a RET gene fusion, and who are radioactive iodine-refractory.
An FDA release says this is the first FDA approval of a targeted therapy for pediatric patients less than 12 years of age with RET alterations. Selpercatinib was previously granted accelerated approval for the thyroid cancer indications in adults and pediatric patients 12 years of age and older. It also was previously granted accelerated approval for the solid tumor indication in adults.
The recent approval was based on data from the LIBRETTO-121 (NCT03899792) single-arm, multi-cohort trial. FDA says the major efficacy outcome measures were confirmed overall response rate and duration of response, which were 48% and 92%, respectively.
The most common adverse reactions (seen in more than 25% of patients) were musculoskeletal pain, diarrhea, headache, nausea, vomiting, coronavirus infection, abdominal pain, fatigue, pyrexia, and hemorrhage, FDA says. The most common Grade 3 or 4 laboratory abnormalities were decreased calcium, decreased hemoglobin, and decreased neutrophils.