Airway Involvement in Conradi–Hünermann–Happle Syndrome: A Novel Clinical Manifestation

We report the first documented case of airway involvement in Conradi-Hünermann-Happle syndrome (CDPX2), an X-linked dominant form of chondrodysplasia punctata caused by pathogenic variants in EBP. A 2-month-old female with genetically confirmed CDPX2 developed severe subglottic stenosis and persistent respiratory distress requiring CPAP; cross-sectional imaging demonstrated extensive laryngotracheal calcifications. Serial endoscopic balloon dilations successfully restored airway patency, enabled weaning from respiratory support, and avoided tracheostomy, expanding the recognized clinical spectrum of CDPX2 and highlighting the potential role of minimally invasive airway intervention in selected cases.