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Immunofluorescent and FISH analysis of skin biopsies
Sylke Gellrich1, Roland Ventura, Margaret Jones
1Department of Dermatology, Venereology and Allergy, Medical Faculty, Humboldt-University, Berlin, Germany.
Insights
Immunofluorescent analysis and fluorescent in situ hybridization (FISH) offer advanced methods for studying cutaneous biopsies. These techniques allow simultaneous visualization of multiple markers and chromosomal abnormalities in routine skin samples.
Area of Science:
- Dermatopathology
- Molecular Pathology
- Immunohistochemistry
Background:
- Traditional immunoenzymatic techniques for cutaneous biopsies have limitations in visualizing multiple markers.
- Immunofluorescent analysis provides a valuable ancillary method for simultaneous antigen visualization.
- Fluorescent in situ hybridization (FISH) is a novel technique applicable to routine skin biopsies for chromosomal analysis.
Purpose of the Study:
- To review the technical aspects of immunofluorescent analysis for cutaneous biopsies.
- To highlight the utility of FISH in analyzing chromosomal abnormalities in skin biopsies.
- To present a combined immunoperoxidase and immunofluorescent staining technique for demonstrating three markers.
Main Methods:
- Immunofluorescent staining for simultaneous visualization of paired antigens.
- Combined immunoperoxidase and immunofluorescent staining for triple marker demonstration.
- Fluorescent in situ hybridization (FISH) for chromosomal abnormality analysis in routine biopsy samples.
Main Results:
- Immunofluorescence allows for simultaneous detection of multiple antigens, resolving ambiguities in conventional staining.
- A novel combined technique enables the demonstration of three markers on a single slide.
- FISH is now feasible for routine analysis of chromosomal abnormalities in cutaneous biopsies, particularly in lymphoma cases.
Conclusions:
- Immunofluorescent and FISH techniques offer powerful, often overlooked, methods for enhanced analysis of cutaneous biopsies.
- These advanced techniques improve diagnostic accuracy and provide deeper insights into cellular markers and chromosomal abnormalities in skin conditions.
- The described methods are applicable to routine dermatopathology practice, expanding diagnostic capabilities.
Abstract:
Cutaneous biopsies are traditionally studied for the expression of cellular markers by immunoenzymatic techniques. However, immunofluorescent analysis is a valuable, and largely overlooked, ancillary technique that can resolve questions arising from conventional immunostaining, since it allows pairs of antigens to be simultaneously visualized. Furthermore, a novel technique, based on a combination of immunoperoxidase and immunofluorescent staining, allows three markers to be demonstrated together. Fluorescent microscopy also allows skin biopsies from lymphoma cases to be analyzed for chromosomal abnormalities by the fluorescent in situ hybridization (FISH) technique, which is now applicable to routine biopsy samples. In this review, we describe the technical aspects of immunofluorescent and FISH analysis of routine cutaneous biopsy samples.
