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While alcoholic cirrhosis is the most common cause of portal hypertension and associated gastrointestinal bleeding, portal vein occlusion can produce similar clinical manifestations. Ultrasonography is an accurate, noninvasive procedure for detecting portal vein thrombosis and distinguishing infrahepatic venous obstruction from intrahepatic obstruction due to cirrhosis.
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WALKER et al. (1983) studied this question.
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