Atypically presenting kaposiform hemangioendothelioma of the knee: ultrasound findings
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Kaposiform hemangioendothelioma (KHE) is a rare vascular tumor of early childhood and infancy. Kasabach–Merritt phenomenon, a common complication of KHE, is characterized by life-threatening thrombocytopenia, hemolytic anemia, and consumption coagulopathy. There may be atypical cases that do not present with Kasabach–Merritt phenomenon and do have atypical imaging findings. Knowledge of atypical imaging features may assist radiologists in identifying KHE. In this report, we present a 4-year-old case of KHE with atypical ultrasound findings.
KeywordsKaposiform hemangioendothelioma Ultrasonography Color Doppler imaging Soft-tissue mass Vascular tumor
Compliance with ethical standards
All procedures performed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Conflict of interest
All authors state that they have no conflicts of interest to declare.