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Chapter-06 Melanocytic Lesions

BOOK TITLE: Color Atlas of Dermoscopy

Author
1. Cabo Horacio Antonio
2. Lallas Aimilios
3. Apalla Zoe
4. Moscarella Elvira
5. Longo Caterina
6. Deinlein Teresa
7. Zalaudek Iris
8. Caccavale Stefano
9. Gambardella Alessio
10. Lupoli Amalia
11. Brancaccio Gabriella
12. Argenziano Giuseppe
ISBN
9789386056306
DOI
10.5005/jp/books/14253_6
Edition
1/e
Publishing Year
2018
Pages
94
Author Affiliations
1. Universidad de Buenos Aires (UBA), Buenos Aires, Argentina; Universidad de Buenos Aires (UBA); Institute of Medical Research, Universidad de Buenos Aires (UBA)
2. Aristotle University, Thessaloniki, Greece
3. Greece
4. Arcispedale S Maria Nuova, IRCCS Reggio, Emilia, Modena, Italy
5. University of Modena and Reggio Emilia, Italy
6. University of Graz, Graz, Austria
7. Medical University of Graz, Graz, Austria; International Dermoscopy Society, Graz, Austria, Hospital Maggiore, University of Trieste, Trieste, TS, Italy
8. Italy, University of Campania Luigi Vanvitelli, Naples, Italy
9. Italy
10. Italy, University of Campania Luigi Vanvitelli, Naples, Italy
11. Italy
12. University of Campania, Naples, Italy, University of Campania Luigi Vanvitelli, Naples, Italy
Chapter keywords
Melanocytic lesion, nevogénesis, congenital melanocytic nevi, acquired melanocytic nevi, atypical nevus, spitz nevus, blue nevus, combined nevus, recurrent nevus, melanoma

Abstract

This chapter gives the brief description on the color images of melanocytic lesions. Melanocytic lesions include criteria of melanocytic lesions, nevogénesis, congenital melanocytic nevi, acquired melanocytic nevi, atypical nevus (dysplastic), spitz nevus, blue nevus and combined nevus, recurrent nevus, and melanoma. The dermoscopic study of pigmented lesions is performed in two steps. The first step involves determining if the lesion is melanocytic or nonmelanocytic. If it is a melanocytic lesion, the physician must continue with the second step, which means differentiating a benign melanocytic lesion from a melanoma. These criteria are pigment network, aggregated globules, streaks or projections, homogeneous blue pigmentation, and parallel pattern. The term “melanocytic nevi” comprises a heterogeneous group of benign melanocytic proliferations with different epidemiologic, clinical, dermoscopic, and histopathologic characteristics. Acquired melanocytic nevi are melanocytic proliferations that are not present at birth. These nevi show a dynamic vital cycle starting at puberty and reaching its maximum incidence in the fourth and fifth decades of life. Spitz nevi can occur in anybody site.

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