Primary biliary cholangitis
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Primary biliary cholangitis (PBC) is a chronic progressive cholestatic liver disease that is the cause of 1-2% of deaths from cirrhosis and constitutes the third most common indication for liver transplantation in adults.
The name of this disease was changed from primary biliary cirrhosis to primary biliary cholangitis in 2014; however, it was also decided to keep the abbreviation as PBC 11.
The typical patient is a middle-aged woman presenting with symptoms of fatigue and pruritus and laboratory test evidence of cholestasis.
cholelithiasis: ~40% 8
interstitial lung disease: ~15% 6
hepatocellular carcinoma: develops in ~5% 7
additional risk in older patients, males, history of diabetes mellitus or past hepatitis B virus infection 7
Clinical features include 12:
pruritus (often the first symptom)
skin hyperpigmentation, especially of arms and trunk
xanthomas and xanthelasma due to hypercholesterolemia
interestingly hypercholesterolemia does not confer an increased risk of death from atherosclerosis
right upper quadrant abdominal discomfort
Primary biliary cholangitis is characterized by the destruction of small intrahepatic bile ducts, portal inflammation, and progressive scarring. The cause of primary biliary cholangitis is unknown, but it is probably due to an inherited abnormality of immunoregulation.
serum anti-mitochondrial antibody (AMA) tests are highly sensitive and specific for primary biliary cholangitis (85-100%10)
T2: if parenchymal lace-like fibrosis and periportal halo sign are seen together the sensitivity for primary biliary cholangitis can approach 70% 2
Other features detectable on MRI include:
periportal hyperintensity (cuffing)
segmental hypertrophy, notably of the caudate lobe
hepatic surface irregularity due to regenerative nodules
regional lymphadenopathy: tends to dominate in the gastrohepatic ligament and porta hepatis 4
Treatment and prognosis
Ursodeoxycholic acid is the mainstay for medical management 12. In cases of primary biliary cholangitis that advance despite pharmacotherapy, liver transplantation clearly improves the survival and quality of life.
Primary biliary cholangitis can recur after transplantation but with a frequency much lower than that for hepatitis and other diseases.
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