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Histopathologic Analysis of Chronic Cutaneous Graft-Versus-Host Disease
Savannah M Alvarado1, Olivia G Cohen2, Katherine Lattanzio3
1Department of Dermatology, University of Pennsylvania, Philadelphia, PA.
The American Journal of Dermatopathology
|September 17, 2024
Summary
Chronic graft-versus-host disease (cGVHD) skin biopsies often mimic other inflammatory skin conditions. This study details histopathologic features of epidermal and sclerotic cGVHD, aiding diagnosis and personalized treatment strategies.
Area of Science:
- Dermatopathology
- Hematology
- Immunology
Background:
- Chronic graft-versus-host disease (cGVHD) is a significant complication following allogeneic hematopoietic cell transplantation.
- Skin biopsy is crucial for diagnosing cGVHD when clinical presentation is ambiguous.
- Histopathologic features of skin cGVHD require further detailed description.
Purpose of the Study:
- To delineate the histopathologic characteristics of skin cGVHD.
- To differentiate features between epidermal cGVHD (E-cGVHD) and sclerotic cGVHD (S-cGVHD).
- To correlate histopathologic findings with clinical presentations.
Main Methods:
- Retrospective analysis of 49 patients with diagnosed skin cGVHD.
- Review of 83 unique skin biopsy specimens from E-cGVHD and S-cGVHD lesions.
- Detailed examination of histopathologic features including epidermal changes, dermal alterations, and specific patterns.
Main Results:
- E-cGVHD biopsies predominantly showed interface dermatitis (47.0%) with basal cell apoptosis (94.0%) and vacuolar change (92.5%).
- S-cGVHD biopsies exhibited a lichen sclerosus/morphea-like pattern (62.5%) with dermal sclerosis (50.0-68.8%).
- Minimal active GVHD features were observed in most biopsies, with overlap in inflammatory patterns.
Conclusions:
- Skin cGVHD histopathology often resembles common inflammatory dermatoses.
- Accurate histopathologic reporting is essential for disease endotyping.
- Understanding these features supports personalized therapeutic approaches for cGVHD patients.
