[Discordance between clinical and immunological aspects in a case of chronic B-type lymphoproliferative syndrome].

Chronic lymphoproliferative disorders are extremely heterogeneous from a clinical, morphological and immunological point of view. The paper reports the case of a woman with chronic prolymphocytic leukemia. The neoplastic clone revealed the typical immunological features of pre-B lymphocytes, which are at an earlier stage of differentiation in respect to prolymphocytes. After polychemotherapy (CEOP) the phenotype of the neoplastic cells shifted to an immunological pattern typical of B lymphocytes.