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  • Title: Dysplastic melanocytic nevi in histologic association with 234 primary cutaneous melanomas.
    Author: Rhodes AR, Harrist TJ, Day CL, Mihm MC, Fitzpatrick TB, Sober AJ.
    Journal: J Am Acad Dermatol; 1983 Oct; 9(4):563-74. PubMed ID: 6630618.
    Abstract:
    Dysplastic melanocytic nevi (DMN) are irregularly pigmented lesions characterized by (1) atypical melanocytic hyperplasia in a lentiginous epidermal pattern (AMHL), (2) one or more dermal mesenchymal changes, and (3) frequently a dermal nevocellular nevus. In order to determine an association between DMN and cutaneous melanoma, the dominant histologic feature of DMN (namely, AMHL) was sought in histologic contiguity with 234 primary melanomas. Of these 234 cases, 9 were lentigo maligna melanomas. Of the remaining 225 cases, 49 (21.8%) were associated with AMHL in the same histologic section as (but beyond the most lateral margin of) intraepidermal and invasive melanoma. AMHL was directly associated with the presence of dermal nevocellular nevi in histologic contiguity with melanoma, and a greater number of histologic slides with melanoma available for review. AMHL was inversely associated with nodular melanoma. Most of the AMHL cases were not associated with familial melanoma, but the total number of familial cases was low. The histologic association between AMHL and melanoma in one fifth of cases in this series supports the hypothesis that at least some cutaneous melanomas may have an origin in DMN.
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