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Pigmented epithelioid melanocytoma: two case reports.
Bruce Howard1, Bruce Ragsdale, Kurt Lundquist
1Central Coast Dermatology, Inc., Santa Maria, California, USA.
Dermatology Online Journal
|September 10, 2005
Summary
Pigmented epithelioid melanocytoma, a benign skin tumor, is proposed as a replacement term for animal-type melanoma. This renaming reflects its indolent nature and indistinguishable histology from epithelioid blue nevus.
Area of Science:
- Veterinary Dermatology
- Oncology
- Pathology
Background:
- The term "animal-type" or "equine" melanoma has been used for pigmented skin lesions.
- Epithelioid blue nevus of the Carney type shares histological similarities with these lesions.
Observation:
- This report reviews the concept of pigmented epithelioid melanocytoma.
- Presents two detailed cases of pigmented epithelioid melanocytoma from the Central Coast of California.
- Includes clinical photographs, offering a visual reference for this condition.
Findings:
- Pigmented epithelioid melanocytoma is histologically indistinguishable from epithelioid blue nevus of the Carney type.
- These lesions exhibit an indolent course with no associated mortality.
- The proposed term "pigmented epithelioid melanocytoma" accurately reflects the benign nature of these tumors.
Implications:
- Suggests a renaming of "equine" or "animal-type" melanoma to "pigmented epithelioid melanocytoma".
- Highlights the importance of accurate terminology in veterinary oncology for reflecting tumor behavior.
- Provides valuable clinical and photographic documentation for comparison and diagnosis.