Sinusoidal obstruction syndrome overview: Difference between revisions
No edit summary |
No edit summary |
||
| Line 3: | Line 3: | ||
{{CMG}}; {{AE}} | {{CMG}}; {{AE}} | ||
==Overview== | ==Overview== | ||
Revision as of 19:39, 2 February 2018
|
Sinusoidal obstruction syndrome Microchapters |
|
Differentiating Sinusoidal obstruction syndrome from Other Diseases |
|---|
|
Diagnosis |
|
Treatment |
|
Case Studies |
|
Sinusoidal obstruction syndrome overview On the Web |
|
American Roentgen Ray Society Images of Sinusoidal obstruction syndrome overview |
|
Directions to Hospitals Treating Sinusoidal obstruction syndrome |
|
Risk calculators and risk factors for Sinusoidal obstruction syndrome overview |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:
Overview
Hepatic veno-occlusive disease or veno-occlusive disease (VOD) is a condition in which some of the small veins in the liver are obstructed. It is a complication of high-dose chemotherapy given before a bone marrow transplant (BMT) and is marked by weight gain due to fluid retention, increased liver size, and raised levels of bilirubin in the blood.[1] The name sinusoidal obstruction syndrome is now preferred if VOD happens as a result of chemotherapy or bone marrow transplantation.[1][2]
Apart from chemotherapy, VOD may also occur after ingestion of certain plant alkaloids such as pyrrolizidine alkaloids (in some herbal teas),[1] and has been described as part of a rare hereditary disease called hepatic venoocclusive disease with immunodeficiency (which results from mutations in the gene coding for a protein called SP110).[3]
History
The first report on veno-occlusive disease, in 1920, was as a result senecio poisoning in South Africa.[4] Subsequent reports were mostly in Jamaicans who had consumed herbal teas.[1] With the advent of bone marrow transplanation, most later reported cases have been in those undergoing treatment for leukemia.[1]
Historical Perspective
Classification
Pathophysiology
In the BMT setting, VOD is felt to be due to injury to the hepatic venous endothelium from the conditioning regimen.
Toxic agents causing veno-occlusive disease include plants as well as the medication cyclophosphamide.
Causes
Differentiating Sinusoidal obstruction syndrome from Other Diseases
Epidemiology and Demographics
Risk Factors
Screening
Natural History, Complications, and Prognosis
Natural History
Complications
Prognosis
When associated with bone marrow transplant, VOD is fatal in over 30% of cases. Cases due to plant alkaloids often have a longer and more unpredictable course.
Diagnosis
Diagnostic Criteria
History and Symptoms
Physical Examination
Features of VOD include weight gain, tender hepatomegaly, ascites, and increased bilirubin. It often is associated with renal failure.
Laboratory Findings
Diagnosic Criteria
Imaging Findings
Ultrasound
Hepatic doppler ultrasound is typically utilized to confirm or suggest the diagnosis. Most common findings on liver doppler ultrasound include increased phasicity of portal veins with eventual development of portal flow reversal. The liver is usually enlarged but maintained normal echogenicity. A liver biopsy is required for a definitive diagnosis.
Other Diagnostic Studies
Treatment
Medical Therapy
Treatment for VOD is primarily supportive. In the BMT setting, defibrotide is an investigational treatment that may be promising. Defibrotide is a polydeoxyribonucleotide isolated from pig intestine. Although its mechanism of action in VOD is unclear, the drug is believed to have antithrombotic properties. In August 2009, Gentium S.p.A., which sponsored the phase 3 clinical trial (pivotal) of defibrotide in hepatic VOD, announced disappointing results. Further clinical development of defibrotide for this indication is uncertain.
Surgery
Prevention
See also
- Budd-Chiari syndrome (large liver vein obstruction due to thrombosis)
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Helmy A (2006). "Review article: updates in the pathogenesis and therapy of hepatic sinusoidal obstruction syndrome". Aliment. Pharmacol. Ther. 23 (1): 11–25. doi:10.1111/j.1365-2036.2006.02742.x. PMID 16393276. Unknown parameter
|month=ignored (help) - ↑ DeLeve LD, Shulman HM, McDonald GB (2002). "Toxic injury to hepatic sinusoids: sinusoidal obstruction syndrome (veno-occlusive disease)". Semin. Liver Dis. 22 (1): 27–42. doi:10.1055/s-2002-23204. PMID 11928077. Unknown parameter
|month=ignored (help) - ↑ Roscioli T, Cliffe ST, Bloch DB, (2006). "Mutations in the gene encoding the PML nuclear body protein Sp110 are associated with immunodeficiency and hepatic veno-occlusive disease". Nat. Genet. 38 (6): 620–2. doi:10.1038/ng1780. PMID 16648851. Unknown parameter
|month=ignored (help) - ↑ Willmot, F; Robertson, Georgew. (1920). "Senecio Disease, Or Cirrhosis Of The Liver Due To Senecio Poisoning". The Lancet. 196 (5069): 848. doi:10.1016/S0140-6736(01)00020-4.