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Psoriasis verrucosa showing peculiar histologic features
S Nakamura1, M Mihara, Y Hagari
1Department of Dermatology, Faculty of Medicine, Tottori University, Yonago, Japan.
The Journal of Dermatology
|February 1, 1994
Summary
This study describes a unique case of psoriasis verrucosa in a 60-year-old man, presenting distinct clinical and histological variations of verrucous papules on the fingers, differing from previously documented cases.
Area of Science:
- Dermatology
- Histopathology
Background:
- Psoriasis verrucosa is a rare variant of psoriasis.
- Verrucous lesions can present with varied morphology.
Observation:
- A 60-year-old man presented with a decade-long history of linearly arranged verrucous papules on his left fingers.
- These papules were accompanied by typical psoriatic lesions on the trunk and extremities.
- Clinically, two types of verrucous papules were identified: dome-shaped with keratotic plugs and crater-shaped with central depressions.
Findings:
- Histopathology revealed distinct features for each papule type.
- Dome-shaped papules showed cup-shaped acanthosis with parakeratotic columns and Munro's microabscesses.
- Crater-shaped papules exhibited cup-shaped epidermal invagination with Kogoj's spongiform pustule-like changes.
- These histological findings differed from previously reported cases of psoriasis verrucosa.
Implications:
- Highlights the diverse histopathological presentations of psoriasis verrucosa.
- Suggests a need for detailed histopathological examination for accurate diagnosis.
- Contributes to the understanding of rare psoriasis variants.