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Summary
A halo can form around a congenital nevus without involution. Histopathology confirms the nevus and depigmented epidermis are linked.
Area of Science:
- Dermatology
- Dermatopathology
Background:
- A halo nevus, also known as a Sutton's nevus, is characterized by a depigmented halo surrounding a central nevus.
- These lesions are often associated with vitiligo or other autoimmune conditions, but can also occur in individuals without systemic disease.
Observation:
- A 24-year-old woman presented with a congenital nevus on her abdomen, which was surrounded by a depigmented halo.
- The lesion and surrounding halo remained stable over a one-year observation period.
Findings:
- Histopathological examination revealed an uninflamed nevus extending into the deep reticular dermis.
- The basal layer of the epidermis at the periphery of the nevus showed depigmentation.
- These microscopic findings are consistent with the specific histopathology of a congenital nevus.
Implications:
- This case demonstrates that a halo can develop around an uninflamed, non-involuting congenital nevus.
- The presence of a halo does not necessarily indicate an autoimmune process or nevus involution.
- It highlights the importance of histopathological correlation for understanding the nature of halo nevi.