The COL1A1-PDGFB fusion gene, is expected to be a diagnostic molecular assay.     ///    The COL1A1-PDGFB fusion transcripts could be detected in 10 of 12 paraffin-embedded DFSP tumor specimens (83%).     ///    "In this present study, the investigators conducted a reverse transcription (RT)-polymerase chain reaction (PCR) assay to detect the COL1A1-PDGFB fusion transcripts using archival formalin-fixed, paraffin-embedded tumor specimens from 12 patients with DFSP. "    ///    "Detection of COL1A1-PDGFB fusion transcripts in dermatofibrosarcoma protuberans by reverse transcription-polymerase chain reaction using archival formalin-fixed, paraffin-embedded tissues.. "    ///    "In sample of DFSP with fibrosarcomatous transformation, the COL1A1-PDGFB could not be detected in the fibrosarcoma areas of the third recurrence, though the chimeric transcripts were identified in the ordinary DFSP areas of the first recurrence. "