Effective treatment with sirolimus in a 6-year-old boy with tracheal vascular malformation initially misdiagnosed as acute laryngitis: a case report

This case highlights considering tracheal vascular malformation in refractory pediatric laryngeal obstruction, supports multimodal imaging for diagnosis without digital subtraction angiography, and confirms sirolimus as a safe, rapid first-line option to guide care and personalized dosing research.