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LLC: critérios diagnósticos, imunofenotipagem e diagnóstico diferencial CLL: diagnostic criteria, immunophenotyping and differential diagnosis

Irene Lorand-Metze

Revista Brasileira de Hematologia e Hemoterapia · 2005

doi:10.1590/s1516-84842005000400003 (opens in a new tab)

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Abstract

O diagnóstico da LLC é baseado em dados do hemograma e da imunofenotipagem dos linfócitos periféricos: linfocitose acima de 5 (ou 10) x 10(9)/L com fenótipo CD19, CD5, CD23 e expressão fraca de imunoglobulinas de superfície monoclonais. A expressão de CD38 ocorre em cerca da metade dos casos e tem relação com o estado não mutado de Ig V. A biópsia de medula só deverá ser realizada antes do tratamento ou quando os dois exames acima não permitirem um diagnóstico definitivo. O diagnóstico diferencial é com os outros linfomas B indolentes, que freqüentemente apresentam células neoplásicas circulantes. Este diagnóstico diferencial é baseado na imunofenotipagem, biópsia de medula ou linfonodo.<br>The diagnosis of CLL is based on the finding of peripheral lymphocytosis of over 5 (or 10) x 10(9)/L presenting the CD19, CD5, CD23 phenotype and a weak monoclonal expression of membrane immunoglobulins. The CD38 expression is observed in half of the cases and is correlated with the unmutated status of the Ig V gene. Bone marrow biopsy should only be performed before starting treatment or if necessary for the differential diagnosis with other low-grade lymphomas. This differential diagnosis is based on the morphology of circulating lymphocytes, their immunophenotypes and pattern of bone marrow infiltration.

Abstract licence: CC BY-NC-ND

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