Until recently, recurrent genetic abnormalities characteristic of the large-cell lymphomas had not been identified.However, the characterization during the past 2 yr of chromosomal rearrangements mvolvmg the BCL6/LAZ3 zmc finger gene located at 3q27 (which is altered m approx 30% of these tumors [2,3]), and the cloning by our group (4) of the NPM-ALK fusion gene produced by the t(2;5) may now permrt the identrficatton of molecular genetic subtypes of largecell lymphoma that possess unique btological and/or clinical features..     ///    NPM-ALK Reverse Transcriptase-Polymerase Chain Reaction Analysis for Detection of the t(2;5) Translocation of Non-Hodgkin's Lymphoma.. 