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Clinical implications of liver biopsy findings in collagen-vascular disorders
A Keshavarzian1, R Rentsch, H J Hodgson
1Department of Medicine, Royal Postgraduate Medical School, Hammersmith Hospital, London, England.
Insights
Liver abnormalities are common in collagen-vascular disorders. Liver biopsy is valuable for diagnosing drug-induced hepatitis and significant chronic liver disease, especially in patients with periarteritis nodosa or mixed cryoglobulinemia.
Area of Science:
- Hepatology
- Rheumatology
- Immunology
Background:
- Collagen-vascular disorders encompass a range of autoimmune conditions affecting connective tissues.
- Liver involvement can be a manifestation of systemic autoimmune diseases, impacting patient prognosis and treatment.
- Understanding the spectrum of liver abnormalities in these patients is crucial for comprehensive care.
Purpose of the Study:
- To investigate the prevalence and nature of liver abnormalities in patients with various collagen-vascular disorders.
- To assess the diagnostic utility of liver histology in identifying primary disease manifestations, chronic liver disease, and drug-induced hepatitis.
- To determine the clinical significance and prognostic implications of liver findings in this patient cohort.
Main Methods:
- A 5-year survey of liver histology in patients diagnosed with collagen-vascular disorders.
- Inclusion criteria comprised patients with systemic lupus erythematosus, rheumatoid arthritis, primary Sjogren's syndrome, periarteritis nodosa, mixed cryoglobulinemia, Wegener's granulomatosis, systemic sclerosis, and other related conditions.
- Histopathological analysis of liver biopsies was correlated with clinical findings and laboratory data.
Main Results:
- Significant chronic liver disease was identified in 24% of patients, often clinically apparent.
- Hepatitis suggestive of drug-induced liver damage was observed in 17% of biopsies.
- Clinically inapparent but significant chronic liver disease was noted, particularly in patients with mixed cryoglobulinemia or Sjogren's syndrome.
- Histological findings diagnostic of the primary collagen-vascular condition were rare, observed only in periarteritis nodosa cases.
Conclusions:
- Liver biopsy is a valuable tool for patients with collagen-vascular diseases and abnormal liver function tests, frequently identifying drug-induced liver damage.
- Significant chronic liver disease is a common finding, though usually clinically evident.
- In specific conditions like periarteritis nodosa and mixed cryoglobulinemia, liver biopsy offers critical diagnostic, prognostic, and therapeutic insights.
Abstract:
We surveyed over a 5-year period liver abnormalities in all patients with collagen-vascular disorders in whom liver histology was obtained, including 46 patients with systemic lupus erythematosus, rheumatoid arthritis, primary Sjogren's syndrome, periarteritis nodosa, mixed cryoglobulinemia, Wegener's granulomatosis, systemic sclerosis, and other conditions. Histological appearances diagnostic of the primary condition were only found in three patients, each of whom had periarteritis nodosa. Significant chronic liver disease was found in 11 patients (24%), in five of whom a strong clinical suspicion of severe chronic liver disease already existed. Clinically inapparent but potentially significant chronic liver disease was found predominantly in patients with mixed cryoglobulinemia or sicca syndrome. Seventeen percent of all biopsies suggested drug induced hepatitis. In patients with collagen-vascular diseases and abnormal liver function tests, histological examination of the liver is most frequently of value in indicating drug-induced liver damage. Significant chronic liver disease is common but usually clinically apparent. In patients with periarteritis nodosa and mixed cryoglobulinemia, liver biopsy may be of value diagnostically, revealing serious liver disease with prognostic and therapeutic implications.