<unk> s are growths (benign or malignant) formed from blood vessels; for example, hemangioma, hemangioendothelioma, Kaposi sarcoma, angiosarcoma. International Society for the Study of<unk>  Anomalies (ISSVA) has classified<unk> s into three main categories depending on their clinical and histological behavior. Some lesions related clinically and/or histologically to<unk> s have been described in provisionally unclassified<unk>  anomalies and related lesions.
Vascular tumor
Benign vascular tumor
Vascular tissue neoplasm
Angioma
Lymphangioma
Aneurysm
Arterial thrombosis
Benign tumor