 It is now widely accepted that the EWS/FLI-1 fusion transcript is associated with tumors of the Ewing family.     ///    We conclude from these results that in situ RT-PCR can be used for the rapid detection of EWS/FLI-1 fusion transcripts in biopsy material.     ///    In situ reverse-transcriptase polymerase chain reaction demonstration of the EWS/FLI-1 fusion transcript in Ewing's sarcomas and peripheral primitive neuroectodermal tumors..     ///    The findings also suggest that all cells of the tumors of the Ewing family carry the EWS/FLI-1 fusion transcript.. 