Related Experiment Videos
Amyloid deposits in lymph nodes: a morphologic and immunohistochemical study
Human Pathology
|December 1, 1986
Summary
Amyloid deposition in lymph nodes is rare, with immunoglobulin-derived protein (AL) amyloidosis being the most common type identified. Immunohistochemistry is crucial for classifying amyloid protein origins in lymph node specimens.
Area of Science:
- Pathology
- Immunohistochemistry
- Protein biochemistry
Background:
- Amyloid deposition can occur in lymph nodes, but its protein origin and patterns are not fully characterized.
- Understanding amyloid types in lymph nodes is essential for accurate diagnosis and patient management.
Purpose of the Study:
- To investigate the protein types and deposition patterns of amyloid in lymph nodes.
- To correlate immunohistochemical findings with morphologic and clinical data.
Main Methods:
- Immunohistochemical typing using specific antisera (anti-AA, anti-A lambda, anti-A kappa, anti-ASc1, anti-AF) on 12 lymph node specimens with amyloid deposition.
- Correlation with morphologic criteria and clinical information.
Main Results:
- Four deposition patterns were identified: vascular, follicular, diffuse, and combined.
- Immunoglobulin-derived protein (AL) amyloidosis was found in all cases of isolated amyloidosis, lymphoplasmacytic/lymphoplasmacytoid immunocytoma, plasmacytoma, and idiopathic amyloidosis.
- AA protein was identified in two cases of reactive systemic amyloidosis. Nine AL cases were A lambda type, and one was A kappa type.
Conclusions:
- Immunoglobulin-derived protein (AL) is the predominant type of amyloidosis in lymph nodes.
- Immunohistochemistry is essential for determining the specific amyloid protein type.
- Morphologic features did not correlate with the identified amyloid types.