Genetic predisposition and specific chromosomal defects associated with Sinclair swine malignant melanomas

: Cytogenetic abnormalities are the hallmarks of most cancers and cutaneous melanomas are no exception. The purpose of this study was to determine whether nonrandom chromosomal abnormalities are associated with development and spontaneous regression of congenital cutaneous melanoma in Sinclair miniature swine. Careful analyses of the peripheral blood lymphocytes, skin fibroblasts, and melanoma cell lines of Sinclair swine indicated telomeric association, genetic instability, and clonal marker formations involving swine chromosomes 2, 3, 6, 7, 12, and 17.