Resumo: FUNDAMENTOS: a classificação dos nevos melanocíticos congênitos (NMC) e a magnitude do risco de transformação em melanoma são ainda polêmicos. OBJETIVOS: Analisar o perfil dos NMC em crianças e adolescentes no IPPMG-UFRJ segundo sexo, cor, idade, tipo clínico, localização e evolução. MATERIAL E MÉTODOS: Estudo longitudinal de coorte retrospectivo e prospectivo de 1994 a 2007; amostra de demanda espontânea e referida. RESULTADOS: 30 crianças e 30 adolescentes apresentaram 74 NMC: 60,8% (pequenos), 27% (médios), 5,4% (grandes) e 6,7% (gigantes), sendo que 45,9% no sexo masculino e 54% no sexo feminino e 45,9% em brancos e 54,% em não brancos. Sexo e cor não influenciaram o tipo clínico. Dentre os pequenos e médios, 27,1% apresentaram-se no tórax e 23% na cabeça e pescoço; os grandes e gigantes no pólo cefálico, região cervical, linha média posterior e membros; 28,3% foram seguidos por mais de 10 anos, 47,3% entre três e nove anos e 24,3% por tempo inferior a três anos. Os NMC pequenos e médios se mantiveram inalterados; um grande e dois gigantes mostraram clareamento; nenhum caso desenvolveu melanoma. CONCLUSÃO: distribuição homogênea entre brancos/não brancos e sexo masculino/ feminino. O sexo e a cor não tiveram relação com o tipo clínico; os NMC pequenos predominaram com localização preferencial no tronco. Palavras-chave: Adolescente; Criança; Melanoma; Nevo pigmentado Abstract: BACKGROUND: The classification of the congenital melanocytic nevus (CMN) and the magnitude of the risk of transformation into melanoma are still controversal. OBJECTIVE: To analyse the profile of the CMN in the child and teenager at IPPMG-UFRJ according to sex, skin colour, age, clinical type, locations and evolution. METHODS: Longitudinal study of retrospective and prospective cohort from 1994 to 2007. Aleatoric sample from spontaneous or referal demand. Results: 30 children and 30 teenagers showed 74 nevi: 60,8% (small), 27% (medium), 5,4% (large) and 6,7% (giant); from these, 45,9% were in the male sex and 54% in the female sex. There were 45,9% in white and 54% in non-white. Sex and skin colour didn't influence the clinical type. Among the small and medium nevi, 27,1% were located in the trunk, 23% in the head and neck; the large and giant ones in the head, neck, back and limbs; 28,3% were attended for more than 10 years, 47,3% between three and nine years and 24,4% for a time below three years; the small and medium CMN kept unchanged. The fading of the lesion was observed in one large and in two giant CMN. No cases of melanoma were observed. CONCLUSION: An homogeneous distribution among white/non white and male/female; the sex and the ethnic group did not influence the clinical type; the small CMN was the most frequent clinical type mainly in the trunk.
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