All of these reported tumors lacked the NPM-ALK fusion transcript.     ///    ALK-positive plasmablastic B-cell lymphoma with expression of the NPM-ALK fusion transcript: report of 2 cases..     ///    Both were positive for NPM-ALK by reverse transcriptase-polymerase chain reaction.     ///    Here we describe 2 well-characterized cases of ALK-positive B-cell lymphoma expressing the NPM-ALK fusion. 