ABSTRACT
Vascular anomalies may be classified into vascular tumors (presence of cellular proliferation) and vascular malformations (VMs) (aberrations in morphogenesis with ectasia of vessels). VMs are classified (according to the predominant vessel type and flow characteristic on Doppler ultrasound or magnetic resonance imaging) on slow-flow lesions (including venous, capillary, or lymphatic VMs) and fast-flow lesions (including arteriovenous malformations with clinically significant arteriovenous shunting). 1 – 6
