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Mucinous nevus
Maki Yokogawa1, Tomoko Kamakura, Hiroaki Ishiguro
1Department of Dermatology, Kochi Medical School, Nankoku, Kochi, Japan.
The Journal of Dermatology
|April 22, 2005
Summary
This study presents a rare case of mucinous nevus in a 15-year-old boy, characterized by firm papules that resolved without recurrence. The findings suggest a link to stimulated glycosaminoglycan synthesis within an epidermal nevus.
Area of Science:
- Dermatology
- Histopathology
- Neoplastic Skin Lesions
Background:
- Mucinous nevus is a rare cutaneous condition characterized by mucin accumulation in the dermis.
- The exact cellular origin and pathogenesis of mucinous nevus remain unclear.
- Distinguishing it from other connective tissue nevi can be challenging.
Observation:
- A 15-year-old male presented with multiple, firm, non-recurrent papules on his upper chest, exhibiting epidermal nevus-like linear arrangement.
- Lesions remained stable for one year before resolving spontaneously, leaving scars.
- Histopathology revealed epidermal acanthosis with elongated rete ridges and significant mucin deposition in the papillary and subpapillary dermis.
Findings:
- The case suggests mucinous nevus may arise from significantly stimulated glycosaminoglycan synthesis.
- This occurs within a specific type of epidermal nevus, even without pronounced hyperkeratosis.
- The findings challenge the classification of localized mucin accumulation as a purely nevoid manifestation.
Implications:
- This case expands the understanding of mucinous nevus pathogenesis.
- It highlights the potential role of epidermal nevi in mucin accumulation disorders.
- Further research is needed to elucidate the cellular mechanisms involved in mucinous nevus development.