We studied whether it is possible to obtain sufficient mRNA from old paraffin-embedded samples of spleen and bone marrow for reverse transcription and polymerase chain reaction analysis. Spleen tissue from 6 subjects with chronic myelogenous leukemia was studied for rearrangement of BCR and ABL genes. Analysis was successful in 4 cases. These data indicate the feasibility of retrospective analysis of tissue samples of special interest by molecular techniques.
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Aurer et al. (2009) studied this question.
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