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Eosinophilic folliculitis. The histologic spectrum
T H McCalmont1, D Altemus, T Maurer
1Department of Pathology, University of California Medical Center, San Francisco 94143, USA.
The American Journal of Dermatopathology
|October 1, 1995
Summary
Eosinophilic folliculitis in human immunodeficiency virus (HIV)-infected individuals presents unique light microscopic features. This HIV-associated dermatosis is distinct from other folliculitides and papular dermatitides.
Area of Science:
- Dermatopathology
- Infectious Disease Dermatology
Background:
- Eosinophilic folliculitis is a distinct skin condition observed in individuals with human immunodeficiency virus (HIV).
- Understanding its specific histological characteristics is crucial for accurate diagnosis.
Purpose of the Study:
- To define the light microscopic features of eosinophilic folliculitis in HIV-infected individuals.
- To differentiate it from other folliculitis types through histological analysis.
Main Methods:
- Histological examination of 52 biopsies from 50 HIV-infected patients with eosinophilic folliculitis.
- Comparison with six biopsies of suppurative folliculitis from HIV-infected individuals.
- Grading of histological findings and analysis of inflammatory infiltrates.
Main Results:
- Consistent findings included perifollicular infiltrates of lymphocytes and eosinophils, and spongiosis of follicular epithelium.
- Inflammation was primarily centered at the follicular isthmus and sebaceous duct.
- Suppurative folliculitis biopsies showed predominant neutrophils and macrophages, with readily identifiable microorganisms.
Conclusions:
- Eosinophilic folliculitis in HIV-infected individuals exhibits unique histological features.
- It is distinguishable from other folliculitides and papular dermatitides by light microscopy.
- This study provides a diagnostic approach for this HIV-associated dermatosis.