[The Clark ("dysplastic") nevus in Mexico].

We present the analysis of a series of 100 Clark's nevus collected during 37 months in three different laboratories of pathology in Mexico City. The purpose has been to know how common is it and what are the clinical features in a sample of the mexican population. We found that Clark's nevus is not so common but it is seen mostly in fair skin people and can be recognized by the trained clinician, we observed four cases associated with melanoma but no patient had the criteria to be considered as having the so called dysplastic nevus syndrome, which may be rare in the mixed (mestizo) population of Mexico. We also reviewed the current concepts about this peculiar melanocytic nevus.