Sirolimus, a promising treatment for refractory Kaposiform hemangioendothelioma

Background Kaposiform hemangioendothelioma (KHE) is a locally aggressive vascular tumor that usually occurs in infants. It is commonly associated with Kasabach–Merritt phenomenon which is directly responsible for the significant morbidity and mortality, including hemodynamic instability, local invasion, and compression of vital structures. Treatment is particularly difficult for those who had no response to conventional therapies. This paper wants to share experience of mTOR inhibitors sirolimus in the treatment of refractory KHE.