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Invasive naevus of Ota
E S Juhasz1, M J Rees, M V Miller
1Department of Surgery, Auckland Public Hospital, New Zealand.
Pathology
|January 1, 1993
Summary
A nevus of Ota, initially thought benign, showed slow invasion over 50 years. Surgical excision of the eye, orbit, and surrounding bone was necessary for complete removal.
Area of Science:
- Ophthalmology
- Dermatology
- Oncology
Background:
- A nevus of Ota is a common congenital melanocytic nevus.
- Diagnosis can be challenging due to potential for malignant transformation.
Observation:
- A case of nevus of Ota followed for 50 years.
- Multiple biopsies during this period were consistently diagnosed as benign cellular blue nevus.
Findings:
- The nevus demonstrated slow, invasive growth over five decades.
- Complete clearance required extensive surgical excision of the left globe, orbit, frontal bone, and meninges.
Implications:
- Highlights the importance of long-term monitoring for nevus of Ota.
- Underscores the potential for rare, late malignant transformation of seemingly benign nevi.
- Emphasizes the need for vigilance in diagnosing and managing atypical presentations of nevus of Ota.