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Unusual Histopathological Patterns in Melanocytic Nevi With Some Previously Undescribed Patterns

Fernandez-Flores, Angel MD, PhD; Cassarino, David S. MD

The American Journal of Dermatopathology: March 2016 - Volume 38 - Issue 3 - p 167–185
doi: 10.1097/DAD.0000000000000381
CME Article
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Abstract: Melanocytic nevi are one of the most common diagnoses in the daily practice of any dermatopathologist. Although in the vast majority of cases the final diagnosis is not difficult, there are certain rare and unusual morphologic variations that can elicit some diagnostic problems. Although some of these variations can be considered as mere morphologic oddities, others might lead to a differential diagnosis with melanoma, or with other tumors, including epithelial or neural tumors. In the current report, we review many of these morphologic variations and discuss the main differential diagnosis, when appropriate.

*Consultant Histopathologist, Department of Cellular Pathology, Hospital El Bierzo, Ponferrada, Spain; and

Consultant Dermatopathologist, Department of Pathology, Southern California Kaiser Permanente, Los Angeles Medical Center (LAMC), Los Angeles, CA.

Reprints: Angel Fernandez-Flores, MD, PhD, Servicio de Anatomía Patologica, Hospital El Bierzo, Medicos sin Fronteras 7, 24411 Ponferrada, Spain (e-mail: dermatopathonline@gmail.com).

All authors and staff in a position to control the content of this CME activity and their spouses/life partners (if any) have disclosed that they have no financial relationships with, or financial interests in, any commercial organizations pertaining to this educational activity.

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