[Amyloidosis in liver biopsies]
Z Gioeva1, B Kieninger, C Röcken
1Institut für Pathologie, Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Deutschland.
Der Pathologe
|May 6, 2009
Summary
Hepatic amyloidosis is most frequently AL amyloidosis, originating from lambda- or kappa-light chains. This condition often presents with significant liver parenchymal atrophy.
Area of Science:
- Pathology
- Immunohistochemistry
- Histopathology
Context:
- Amyloidosis diagnosis relies on accurate tissue analysis.
- Liver biopsies are crucial for identifying and classifying amyloidosis types.
- Understanding amyloid origin is key for patient management.
Purpose:
- To re-evaluate the histopathology and determine the origin of amyloid deposits in liver biopsies.
- To classify different types of hepatic amyloidosis using immunohistochemistry.
- To correlate amyloid type with clinical and pathological findings.
Summary:
- A study of 588 liver biopsies identified amyloid in 46 cases.
- Immunohistochemistry classified 42 cases: 87% AL amyloidosis (57% lambda, 30% kappa light chain), 2% AA amyloidosis, 2% ATTR amyloidosis.
- Hepatic amyloidosis is predominantly AL amyloidosis of lambda- and kappa-light chain origin, often linked to parenchymal atrophy.
Impact:
- Clarifies the predominant types of amyloidosis affecting the liver.
- Provides essential data for differential diagnosis of hepatic amyloidosis.
- Highlights the importance of immunohistochemistry in precise amyloid subtyping.
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Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
03:03Amyloid Fibrils
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining, normally used to...
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