Cardiac amyloidosis cardiac biopsy: Difference between revisions
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==Cardiac Biopsy== | ==Cardiac Biopsy== | ||
Biopsy is a standard diagnostic test in the evaluation of cardiac amyloidosis. Biopsied tissue is stained with specific stains | Biopsy is a standard diagnostic test in the evaluation of cardiac amyloidosis. Biopsied tissue is stained with amyloid specific stains to quantify the extent of involvement. | ||
* Congo red staining of the specimen appears as an amorphous pink deposit under light microscopy and as green-apple birefringence under polarized microscopy. | * Congo red staining of the specimen appears as an amorphous pink deposit under light microscopy and as green-apple birefringence under polarized microscopy. | ||
* An alternative stain is | * An alternative stain is sulfate Alcian blue which has high specificity for amyloid. | ||
* Immunostaining of the biopsy specimen is required to identify the deposited protein and to differentiate between ATTR and AL types of cardiac amyloidosis. | * Immunostaining of the biopsy specimen is required to identify the deposited protein and to differentiate between ATTR and AL types of cardiac amyloidosis. | ||
===Advantages=== | |||
* Most accurate with a sensitivity approaching 100% | |||
* Safe in experienced hands | |||
===Dis-advantages=== | |||
* Invasive | |||
* Expensive | |||
* Lack of availability | |||
==References== | ==References== | ||
Revision as of 21:09, 4 May 2013
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Cardiac amyloidosis Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Cardiac amyloidosis cardiac biopsy On the Web |
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American Roentgen Ray Society Images of Cardiac amyloidosis cardiac biopsy |
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Risk calculators and risk factors for Cardiac amyloidosis cardiac biopsy |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Raviteja Guddeti, M.B.B.S. [2]; Aarti Narayan, M.B.B.S [3]
Overview
A cardiac biopsy that reveals amyloid confirms the diagnosis. Biopsy of other tissues may also confirm the diagnosis. Amyloidosis is frequently confirmed by biopsy of abdominal fat, rectal submucosa, kidney, or bone marrow.
Cardiac Biopsy
Biopsy is a standard diagnostic test in the evaluation of cardiac amyloidosis. Biopsied tissue is stained with amyloid specific stains to quantify the extent of involvement.
- Congo red staining of the specimen appears as an amorphous pink deposit under light microscopy and as green-apple birefringence under polarized microscopy.
- An alternative stain is sulfate Alcian blue which has high specificity for amyloid.
- Immunostaining of the biopsy specimen is required to identify the deposited protein and to differentiate between ATTR and AL types of cardiac amyloidosis.
Advantages
- Most accurate with a sensitivity approaching 100%
- Safe in experienced hands
Dis-advantages
- Invasive
- Expensive
- Lack of availability