Over the last few decades, efforts in secondary prevention of melanoma have been focused on early recognition and prompt derivation of suspicious lesions. In 1985, the ABCD acronym was designed8 to provide simple parameters for the detection of suspicious pigmented skin lesions that might require evaluation by a specialist. The sensibility and specificity of these criteria may vary when they are used separately or in combination, and sensitivity decreases as specificity increases.13 The addition of E, for evolution, has substantially improved the ability of clinicians and the general population to detect melanomas at an early stage by recognizing their natural dynamics. The latter criterion is especially important for the diagnosis of nodular melanoma, which frequently, at least initially, is symmetrical, with regular borders and few colors.14- 19 The following EFG acronym has been suggested for the recognition of nodular melanoma: E for elevation, F for firm, and G for growth. Although 35 of 50 of FUMMs were clinically asymmetrical, just 27 of 50 had irregular borders, 23 had multiple colours or 22 a diameter greater than 6 mm, and only 6 fulfilled the 4 ABCD clinical criteria, which raises the question of their usefulness in the recognition of early malignant lesions. In our study, 28 of the lesions in the FUMM group (56%) had a diameter equal to or less than 6 mm, which supports the current main critique of the ABCD clinical system by pointing out that a significant proportion of malignant melanomas may be less than 6 mm in diameter and that they have different aspects and begin as small lesions. No nodular melanoma was diagnosed in patients included in follow-up during the study; this may be explained by the small sample size and the relatively short term of follow-up, which was not sufficient to include the possibility of the occurrence of an early nodular melanoma.