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[Eruptive vellus hair cysts]
T Jansen1, H Wolff, H Schirren
1Dermatologische Klinik und Poliklinik, Ludwig-Maximilians-Universität, München.
Summary
Eruptive vellus hair cysts are rare skin conditions presenting as small bumps with vellus hairs, typically seen in younger individuals. This case highlights a familial occurrence and differentiates them from similar conditions like steatocystoma multiplex.
Area of Science:
- Dermatology
- Histopathology
- Genetics
Background:
- Eruptive vellus hair cysts (EVHC) are uncommon benign epidermal neoplasms characterized by multiple small papules.
- These cysts typically manifest in children and young adults, presenting as asymptomatic lesions on the trunk and extremities.
Observation:
- A 21-year-old male presented with asymptomatic comedo-like papules on his face, neck, and chest.
- The patient's father exhibited similar clinical features, suggesting a potential hereditary component.
Findings:
- Histopathological examination revealed mid-dermal epidermoid cysts with a delicate stratum granulosum, keratinous debris, and numerous vellus hairs.
- These findings confirmed the diagnosis of eruptive vellus hair cysts.
Implications:
- EVHC share clinical similarities with steatocystoma multiplex, necessitating careful histopathological evaluation for accurate diagnosis.
- Recognizing EVHC as a distinct entity is crucial for appropriate patient management and understanding of follicular cyst development.