Combined method for simultaneous morphology, immunophenotype and karyotype (MAC) in leukemias
Palavras-chave:
Leukemia, chromosomes, imunophenotypeResumo
Este trabalho avaliou um método combinado (MC) para identificação simultânea da morfologia, cariótipo e imunofenótipo da célula leucêmica. Foram estudados 21 pacientes com leucemia aguda e 1 com LMC em crise blástica através da morfologia, citoquimica, imunofenotipagem e citogenética. O cariótipo foi feito em material proveniente da medula óssea pelas técnicas convencionais e para cada caso, foi feito o método direto (MD) e/ou três culturas. O MC consistia em separar pequena parte do material de qualquer cultura ou MD, preparar as laminas através de citocentrífuga e fazer a imunofenotipagem pelo método do APAAP com os mesmos anticorpos monoclonais (AcMo) usados ao diagnóstico. Em 14 casos as metáfases mostraram positividade para os AcMo: em 4 as células com anormalidades tiveram sua origem definida, em 4 casos o cariótipo era normal impedindo identificações e 6 tinham aberrações mínimas impossíveis de serem vistas através do MC. Em dois casos o cariótipo anormal foi encontrado apenas nas culturas com GM-CSF. O estudo mostrou que o MC é válido para casos com alterações cromossômicas numéricas ou estruturais evidentes.
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