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"Thread and streak sign in hepatocellular carcinoma".

'Thread and streak sign' refers to the pattern of early opacification of the blood spaces within the portal vein tumor thrombus in Hepato-Cellular Carcinoma. Originally described in digital subtraction angiogram, this sign is increasingly observed in the hepatic arterial phase of contrast study of the abdomen. Here we present a typical 'thread and streak' sign in contrastenhanced CT of the abdomen.