## Abstract ## BACKGROUND Desmoplastic melanoma is an uncommon variant of cutaneous melanoma that mimics soft tissue sarcoma both clinically and morphologically. An activating point mutation of the __BRAF__ oncogene has been identified in a high proportion of conventional cutaneous melanomas, but
Absence of exon 15 BRAF germline mutations in familial melanoma
β Scribed by Julie Lang; Maureen Boxer; Rona MacKie
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 169 KB
- Volume
- 21
- Category
- Article
- ISSN
- 1059-7794
No coin nor oath required. For personal study only.
β¦ Synopsis
We have analyzed DNA from peripheral blood of 42 cases of familial melanoma for germline mutations in exon 15 of the BRAF gene. No evidence of mutation was found. We have also analyzed DNA extracted from secondary melanoma from two members of these families. These results were also negative. In addition we have searched for exon 15 BRAF mutations in 24 samples of secondary melanoma from 22 cases of sporadic melanoma and detected the 1796T>A BRAF mutation which leads to a substitution of valine by glutamic acid at position 599 (V599E) in six samples. Peripheral blood DNA from two of these tumor-positive cases of sporadic melanoma were negative for the V599E BRAF mutation. This mutation therefore appears to be a somatic mutation associated with melanoma development and/or progression in a proportion of affected individuals.
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Germline mutations within the CDKN2A gene, coding for the cyclin-dependent kinase inhibitor p16, have been detected by screening in 8% of Swedish families with an inheritance of cutaneous melanoma (FMM) and dysplastic nevus syndrome (DNS). Contrastingly, the closely related gene CDKN2B had no diseas
## Abstract Germline mutations in the __CDKN2A__ gene have been shown to predispose individuals to cutaneous malignant melanoma. Here, we describe three melanomaβprone families and one isolated patient affected by multiple melanoma who carried a tandem germline mutation of __CDKN2A__ at the nucleot
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