No association was found between the different COL1A1-PDGFB fusion transcripts and the different histologic subtypes.     ///    The COL1A1-PDGFB fusion transcript was found in 100% DFSP-FS and 72% DFSP.     ///    "Dermatofibrosarcoma protuberans: a clinicopathological, immunohistochemical, genetic (COL1A1-PDGFB), and therapeutic study of low-grade versus high-grade (fibrosarcomatous) tumors.. "    ///    COL1A1-PDGFB is a useful tool for diagnosis of DFSP and particularly for DFSP-FS.. 