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Melanoma in association with acquired melanocytic nevus in Japan: a review of cases in the literature.
MedLine Citation:
PMID:  21155082     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
BACKGROUND: Malignant melanomas clinically and/or histologically associated with melanocytic nevi have been reported worldwide. Approximately 20% of malignant melanomas in Caucasians, most of which are found on the trunk and proximal extremities, develop in association with pre-existing melanocytic nevi. In Japan, however, over half of all melanomas are acral lentiginous melanomas (ALMs) on the hands and feet; melanomas on sun-exposed areas are seen less frequently in Japanese people than in Caucasians. As ALMs are not usually accompanied by melanocytic nevi and there have been no reviews of the literature or statistical data regarding Japanese cases of melanomas with melanocytic nevi, dermatologists in Japan have few opportunities to see melanomas associated with pre-existing melanocytic nevi.
METHODS: Here we report a case of a superficial spreading melanoma that was formed on a melanocytic nevus on the trunk, and we review for the first time the case reports from the Japanese literature.
RESULTS AND CONCLUSIONS: With regard to the reported cases, melanomas associated with melanocytic nevi were mainly superficial spreading melanomas and nodular melanomas on the trunk or extremities; ALMs were rarely associated with nevi, indicating a trend similar to that observed in Caucasians. These findings suggest that the low frequency of associations between melanomas and melanocytic nevi in Japan reflects racial differences in the frequencies of each type of melanoma.
Authors:
Y Togawa; Y Nakamura; N Kamada; N Kambe; Y Takahashi; H Matsue
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of dermatology     Volume:  49     ISSN:  1365-4632     ISO Abbreviation:  Int. J. Dermatol.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0243704     Medline TA:  Int J Dermatol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1362-7     Citation Subset:  IM    
Affiliation:
Department of Dermatology, Chiba University Graduate School of Medicine, Chiba, Japan. togawa-yk@faculty.chiba-u.jp
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