Superficial venous thrombosis presenting as a painful popliteal fossa mass in a child

We report an unusual case of superficial venous thrombosis in a cyanotic 12‐year‐old child who had undergone recent appendectomy. Although compression, color Doppler, and duplex ultrasound techniques remain the keys to the diagnosis of venous thrombosis, SieScape sonography was beneficial in demonstrating the extent of the thrombi and their location along a superficial thrombosed vein. © 1998 John Wiley & Sons, Inc. J Clin Ultrasound 26:470–473, 1998.