PDGFB and dermatofibrosarcoma protuberans: The hypothesized pathogenesis of DFSP is largely due to protooncogenes which are as a result or is associated by either; marked by chromosomal translocation t (17;22) (q11; q13.1) or an extra ring of chromosome derived from the t (17;22) which ends in the formation of COL1A1-PDGFB fusion gene in the greater number of cases of DFSP [19-21].