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Published on: December 18, 2016
Silver diagnosis in neuropathology: principles, practice and revised interpretation.
1Department of Neuropathology, Tokyo Metropolitan Institute for Neuroscience, 2-6 Musashi-dai, Fuchu, Tokyo 183-8526, Japan. uchihara@tmin.ac.jp
Acta Neuropathologica
|April 3, 2007
Summary
Silver-staining methods are crucial for diagnosing brain diseases. This review clarifies four key methods, revealing that silver staining is heterogeneous and specific to both the stain and the lesion, aiding in disease identification.
Area of Science:
- Neuropathology
- Histology
- Neuroscience
Background:
- Silver-staining methods are vital for identifying pathological deposits in tissues.
- Despite ambiguities, these stains are widely used in histopathological diagnosis.
- This review focuses on four major silver-staining methods: modified Bielschowsky, Bodian, Gallyas (GAL), and Campbell-Switzer (CS).
Observation:
- Argyrophilia, the property of being stained by silver, is not a uniform phenomenon.
- Comparative studies show argyrophilia is heterogeneous, varying with both the staining method and the specific lesion.
- Each silver-staining method exhibits unique lesion-dependent specificity and sensitivity.
Findings:
- The "method- and lesion-dependent" nature of argyrophilia allows for disease-specific lesion sorting based on silver-staining profiles.
- Empirical correlations link GAL+/CS- deposits to 4-repeat (4R) tauopathies and GAL-/CS+ deposits to 3-repeat (3R) tauopathies.
- Deposits with both 3R and 4R tau (Alzheimer's type neurofibrillary tangles) are GAL+/CS+.
Implications:
- Silver-staining profiles, particularly when combined with immunohistochemistry, offer valuable diagnostic insights.
- These methods provide complementary information to immunohistochemical and biochemical analyses.
- Further research is needed to elucidate the molecular mechanisms underlying these observed correlations.
