JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
REVIEW
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Hepatic veno-occlusive disease after bone marrow transplant.

Blood Reviews 1993 March
Hepatic veno-occlusive disease (VOD) is a non-thrombotic obliteration of the lumina of small intrahepatic veins. VOD has been reported after exposure to a wide variety of pathogens. It has been suggested that the chemoradiotherapy used as the conditioning regimen for bone marrow transplant (BMT) is now the main cause of this disease. However, the pathogenesis of VOD after BMT is probably multifactorial. Endothelial injury of sinusoids and small hepatic veins is considered to be the initial event in genesis of VOD. This injury is followed by deposition of fibrin-related aggregates in the subendothelial zone. These aggregates, and the intramural entrapment of fluid and cellular debris, occlude progressively the hepatic venous outflow and generate a postsinusoidal intrahepatic hypertension. Clinically, VOD is characterized by jaundice, weight gain, ascites, painful hepatomegaly and platelet refractoriness developing early post transplant, although other posttransplant liver disturbances can produce a similar syndrome. VOD diagnosis is usually established by applying the clinical criteria proposed by the Seattle and Baltimore groups. When clinical diagnosis of VOD is uncertain, a transjugular liver study including a transvenous biopsy and measurement of the gradient between wedged and free hepatic venous pressure, is recommended in order to establish an accurate diagnosis. According to the literature data, the incidence of VOD ranges from 0 to 70% and its mortality from 20 to 50%. This very wide range is attributable to the different incidence of risk factors in the different series and to the differences in applying the diagnostic criteria.(ABSTRACT TRUNCATED AT 250 WORDS)

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