Detection of API2-MALT1 fusion transcripts in cytologic specimens of patients with pulmonary mucosa-associated lymphoid tissue lymphoma..     ///    "In this study, we performed a multiplex reverse transcription-polymerase chain reaction (RT-PCR) assay to detect the API2-MALT1 fusion transcript in archival cytologic specimens used as RNA sources. "    ///    This finding suggests that such specimens can be used as RNA sources in multiplex RT-PCR assays for the API2-MALT1 fusion transcript.     ///    API2-MALT1 fusion is specific to MALT lymphoma and is detected in nearly half of the pulmonary cases.     ///    "The detection of API2-MALT1 fusion as carried out with these specimens would be useful as an ancillary assay for the diagnosis, staging, and follow-up of pulmonary MALT lymphoma.. "