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Dermoscopic Evolution of Pediatric Nevi

Annals of Dermatology 2019년 31권 5호 p.518 ~ 524
 ( Cengiz Fatma Pelin ) - Bezmialem Vakif University Department of Dermatology

 ( Yilmaz Yaren ) - Bezmialem Vakif University Faculty of Medicine
 ( Emiroglu Nazan ) - Bezmialem Vakif University Department of Dermatology
 ( Onsun Nahide ) - Bezmialem Vakif University Department of Dermatology


Background: The incidence of pediatric melanoma is very rare. Dermoscopic features help to distinguish pediatric melanoma and common nevi.

Objective: To study the evolution of dermoscopic findings in benign nevi in childhood through serial observation and photography.

Methods: We examined 504 melanocytic lesions in 100 patients. From each participant, dermoscopic images of the nevi from 4-year dermoscopic follow-up were obtained, including randomly selected nevi.

Results: The most common dermoscopic patterns were homogeneous (193 nevi; 38.3%), globular (92 nevi; 18.3%), and reticular (86 nevi; 17.1%). Dermoscopic pattern changes were detected in 27% of patients aged 2~10 years and in 20% of patients aged 11~16 years. The main pattern changes consisted of the transition from homogeneous to globular-homogeneous (16%), from homogeneous to reticular-homogeneous (12%) and from globular to globular-homogeneous (10%). Although 257 of the 504 nevi (51.0%) have stable duration without size changes, 169 of the 504 nevi (33.5%) were enlarged, and 78 of the 504 nevi (15.5%) had become smaller.

Conclusion: These results contrast with the prevailing view that dermoscopic patterns in pediatric nevi are usually characterized by globular patterns and that melanocytic nevi generally undergo a characteristic transition from a globular pattern to a reticular pattern. Fifty one percent of patients did not exhibit a size change. While 33% of patients had symmetrical enlargement, 15% of patients had involution. Therefore, enlargement is a common dermoscopic change in pediatric nevi, and is not a specific sign of pediatric melanoma.


Child; Dermoscopy; Nevus
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