Infigratinib (previously marketed as Truseltiq for cholangiocarcinoma) is an investigational oral therapy designed to inhibit FGFR3 and target skeletal dysplasias, such as achondroplasia, at the source to potentially improve bone growth by decreasing the overactivity of FGFR3. Overactivating FGFR3 pathogenic variants drive downstream MAPK and STAT1 signaling that aberrates growth plate development, thereby causing disproportionate short stature and the potential for serious health complications stemming from cranial and spinal issues. In the Phase 3 PROPEL 3 trial in 114 children aged 3 to 17 years, once-daily oral infigratinib met its primary endpoint of change in annualized height velocity at Week 52, with results published in the New England Journal of Medicine in June 2026. Infigratinib has received Breakthrough Therapy, Fast Track, Orphan Drug and Rare Pediatric Disease Designation from the FDA for achondroplasia. The FDA has accepted the New Drug Application for oral infigratinib in children with achondroplasia for Priority Review, with a PDUFA target action date of February 4, 2027. Additionally, we have reached regulatory alignment with the FDA on the clinical development plan for infigratinib in infants and toddlers with achondroplasia from birth to less than 3 years old: this clinical trial is now enrolling.