DISCASM is a component of the Trinity Cancer Transcriptome Analysis Toolkit (CTAT). DISCASM aims to extract reads that map to reference genomes in a discordant fashion and optionally include reads that do not map to the genome at all, and perform a de novo transcriptome assembly of these reads. DISCASM relies on the output from STAR (as run via STAR-Fusion), and supports de novo transcriptome assembly using Trinity or Oases. Please read more here.