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Guess what! Eruptive vellus hair cysts
K Baums1, U Blume-Peytavi, E Dippel
1Department of Dermatology, University Medical Centre, Benjamin Franklin, The Free University of Berlin, Fabeckstr. 60-62, D-14195 Berlin, Germany.
European Journal of Dermatology : EJD
|September 12, 2000
Summary
A rare skin condition caused multiple, persistent papular lesions. Histopathology revealed cysts filled with keratin and vellus hairs, suggesting a unique follicular origin.
Area of Science:
- Dermatology
- Histopathology
- Dermato-oncology
Background:
- A 24-year-old woman presented with asymptomatic, progressively enlarging papular lesions on her trunk over 18 months.
- The lesions were skin-colored, 2-5 mm in diameter, and distributed on the neck, chest, axillae, and upper abdomen.
Observation:
- Physical examination noted multiple smooth, painless papules without grouping.
- Laboratory investigations were unremarkable.
- Histopathology revealed mid-dermal cysts lined by squamous epithelium with a granular layer.
Findings:
- Cysts contained laminated keratinous material and numerous vellus hairs.
- Absence of sebaceous elements within or adjacent to the cysts was noted.
- Polaroscopic examination confirmed the presence of double refractile vellus hairs within the cysts.
Implications:
- The findings suggest a rare follicular cyst, possibly a variant of steatocystoma or a related entity.
- This case highlights the importance of histopathological examination for diagnosing unusual cutaneous lesions.
- Further research may elucidate the specific pathogenesis and classification of such follicular cysts.