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1.
J Am Acad Dermatol ; 87(3): 551-558, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-35104588

RESUMEN

BACKGROUND: Congenital nail matrix nevi (NMN) are difficult to diagnose because they feature clinical characteristics suggestive of adult subungual melanoma. Nail matrix biopsy is difficult to perform, especially in children. OBJECTIVE: To describe the initial clinical and dermatoscopic features of NMN appearing at birth (congenital) or after birth but before the age of 5 years (congenital-type). METHODS: We conducted a prospective, international, and consecutive data collection in 102 hospitals or private medical offices across 30 countries from 2009 to 2019. RESULTS: There were 69 congenital and 161 congenital-type NMNs. Congenital and congenital-type NMN predominantly displayed an irregular pattern of longitudinal microlines (n = 146, 64%), reminiscent of subungual melanoma in adults. The distal fibrillar ("brush-like") pattern, present in 63 patients (27.8%), was more frequently encountered in congenital NMN than in congenital-type NMN (P = .012). Moreover, congenital NMN more frequently displayed a periungual pigmentation (P = .029) and Hutchinson's sign (P = .027) than did congenital-type NMN. LIMITATIONS: Lack of systematic biopsy-proven diagnosis and heterogeneity of clinical and dermatoscopic photographs. CONCLUSION: Congenital and congenital-type NMN showed worrisome clinical and dermatoscopic features similar to those observed in adulthood subungual melanoma. The distal fibrillar ("brush-like") pattern is a suggestive feature of congenital and congenital-type NMN.


Asunto(s)
Melanoma , Enfermedades de la Uña , Nevo , Neoplasias Cutáneas , Adulto , Niño , Preescolar , Dermoscopía , Diagnóstico Diferencial , Humanos , Recién Nacido , Melanoma/diagnóstico por imagen , Melanoma/patología , Enfermedades de la Uña/diagnóstico por imagen , Enfermedades de la Uña/patología , Nevo/diagnóstico , Estudios Prospectivos , Neoplasias Cutáneas/diagnóstico por imagen , Neoplasias Cutáneas/patología
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