文摘
Kaposiform hemangioendothelioma (KHE) is a rare, weakly malignant vascular tumor that occurs nearly exclusively during infancy and childhood. It is often complicated by the Kasabach-Merritt phenomenon (KMP), severe thrombocytopenia and consumptive coagulopathy which can lead to severe hemorrhagic complications. This article describes the case of a term newborn with a protracted birth caused by a fulminant swollen, red-colored right arm and a threatening circulation disorder of the ipsilateral hand. The clinical, radiological and laboratory findings including histological analysis were in line with the diagnosis of congenital KHE with KMP. High-dose administration of prednisolone, acetylsalicylic acid and later sirolimus therapy resulted in a clear reduction of the tumor mass and recovery from thrombocytopenia. During the time of treatment the tumor became steroid-dependent and in the further course also vincristine-dependent; therefore, laser therapy was initiated, which successfully caused the tumor to disappear. Additional treatment with propranolol showed no positive effects. Neonatal KHE can present as an emergency and as in this case requires immediate treatment due to thrombocytopenia and imminent loss of hand function from circulation failure.