Abstract
Primary Biliary Cholangitis (PBC) is a chronic autoimmune cholestatic liver disease characterised by the presence of antimitochondrial antibodies, which are considered disease-specific and progressive destruction of small intrahepatic bile ducts leading to cholestasis and end-stage liver disease in a proportion of patients.
Since its first description, a considerable amount of data has significantly changed our perception of the disease’s pathogenesis, epidemiology, natural history and treatment.
The geoepidemiology of PBC has changed with prevalence and incidence rates rising over time mainly in developed countries. The strong genetic predisposition of PBC has been revealed by genome-wide association studies, while a large number of environmental factors have emerged as disease triggers over time. Immune mechanisms in PBC are better understood, including the role of biliary epithelial cells in stimulation and maintenance of the inflammatory process.
Treatment aims at delaying disease progression and managing patients’ symptoms. Treatment strategies should be individualized based on patient’s stratification risk as assessed by various prognostic factors. Ursodeoxycholic acid, the mainstay of PBC treatment has in general improved significantly the disease’s natural history, however a proportion of patients don’t respond to treatment. These patients should be offered emerging second-line treatments, including obeticholic acid and other drugs under investigation.
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Self Study
Self Study
1.1 Questions
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1.
A 55-year old woman presents to the clinic with a 6-month history of progressively deteriorating pruritus and fatigue. Liver biochemistry shows an increase in ALP (×2.5 ULN) and slight increase of gGT and ALT. She denies alcohol drinking and systematic use of any drugs. On clinical examination she has palmar erythema and enlarged liver. Liver and bile duct ultrasound show hepatomegaly, with no liver lesions or bile duct dilatation. What is the test that you are going to order next for this patient?
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(a)
Antinuclear antibodies
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(b)
Antimitochondrial antibodies
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(c)
Serum IgM
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(d)
Liver biopsy
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(a)
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2.
What is not true about PBC?
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(a)
PBC affects predominantly men
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(b)
PBC patients often have increased cholesterol levels
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(c)
Hashimoto’s thyroiditis co-exist in a significant proportion of patients
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(d)
Antinuclear antibodies displaying a multiple nuclear dot and a perinuclear/rim-like pattern in indirect immunofluorescence are considered specific for PBC
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(a)
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3.
What is the initial recommended treatment of choice in PBC?
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(a)
Budenofalk
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(b)
Ursodeoxycholic acid
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(c)
Azathioprine
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(d)
Fibrates
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(a)
1.2 Answers
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1.
A 55-year old woman presents to the clinic with a 6-month history of progressively deteriorating pruritus and fatigue. Liver biochemistry shows an increase in ALP (×2.5 ULN) and slight increase of gGT and ALT. She denies alcohol drinking and systematic use of any drugs. On clinical examination she has palmar erythema and enlarged liver. Liver and bile duct ultrasound show hepatomegaly, with no liver lesions or bile duct dilatation. What is the test that you are going to order next for this patient?
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(a)
Antinuclear antibodies can be positive in PBC and some of them are regarded as disease-specific. However, this is not the first test to be ordered in cases of high suspicion of PBC
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(b)
CORRECT ANSWER. In patients with cholestasis and other clinical features suggestive of the PBC, the diagnosis can be established based on the detection of antimitochondrial antibodies (titre > 1/40), which are present in over 90% of patients and are considered disease specific.
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(c)
Serum IgM is often elevated in PBC patients and can aid in establishing the diagnosis in atypical cases. Though serum IgM is not a criterion for PBC diagnosis.
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(d)
Liver biopsy is not necessary in typical PBC cases with presence of cholestasis and antimitochondrial antibodies.
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(a)
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2.
What is not true about PBC?
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(a)
CORRECT ANSWER. PBC affects predominantly women. Average reported female to male ratio are 10:1
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(b)
Hypercholesterolemia is a frequent feature in PBC patients
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(c)
Hashimoto’s thyroiditis is one of the most frequent autoimmune diseases that co-exist in PBC patients
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(d)
Antinuclear antibodies displaying a multiple nuclear dot and a perinuclear/rim-like pattern in indirect immunofluorescence are considered specific for PBC and are present in up to 50% of PBC patients depending from the method used.
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(a)
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3.
What is the initial recommended treatment of choice in PBC?
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(a)
Budenofalk is not a licensed drug for PBC and cannot be recommended
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(b)
CORRECT ANSWER. Ursodeoxycholic acid is recommended by scientific societies as first-line treatment for all patients with PBC that usually continues for life.
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(c)
Azathioprine doesn’t belong to the armamentarium of PBC. It can be administered in conjunction with steroids in variant PBC-AIH cases.
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(d)
Fibrates are being studied in PBC as add-on treatment to UDCA in non-responders to UDCA. Up to the present they are non-licensed for PBC treatment.
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(a)
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Rigopoulou, E.I. (2020). Primary Biliary Cholangitis. In: Radu-Ionita, F., Pyrsopoulos, N., Jinga, M., Tintoiu, I., Sun, Z., Bontas, E. (eds) Liver Diseases. Springer, Cham. https://doi.org/10.1007/978-3-030-24432-3_24
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