The lower extremities of 60 consecutive symptomatic patients were examined first by ultrasound (US) and then by phlebography. Deep venous thrombosis was found in 17 patients by means of venography. A hematoma was detected by US in six legs without thrombosis. A popliteal cyst was observed by US in five cases; one patient had a concurrent deep venous thrombosis. It was concluded that symptomatic patients with a negative phlebography should be examined by US for correct diagnosis and treatment, although US cannot replace phlebography.