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Introduction: the Giant Congenital Melanocytic Nevus (GCMN) is a pigmented lesion of great size, usually presented since the birth, although some lesions could appear in the first months of life. It is an atypical benign proliferation of melanocytes in the skin that could have curious morphologies. It is associated in some cases to extracutaneous manifestations and melanoma development. It is characterized by a hyperpigmented lesion in different tones of brown and could affect since the brain until the lower limbs. The most frequent location is the posterior trunk, the face, scalp and extremities. Case report: the case of a young female patient with GCMN «in garment» with several satellite lesions is presented in order to carry out a thematic review and to indicate the importance of the control period and following. Conclusion: the GCMN is a benign cutaneous alteration that implies serious esthetic disorders when it increases its size. The treatment difficulties and the medico-social implications must be kept in mind. Rev.cienc.biomed. 2015;6(1):155-159 KEYWORDS Nevus, Pigmented nevus; Melanoma; Melanocytes.