[Errors in the diagnosis and therapy of chronic lympholeukemias].

The analysis of 67 cases of benign, progressive, tumor CLL, lymph node lymphocytoma, CLL sarcoma transformation showed that the cases were misdiagnosed in 35.8% cases. The most common mistake (25.4%) was aggressive chemotherapy based on histological diagnosis of prolymphocytic, prolymphocytic-lymphoblastic lymphosarcoma without consideration of cytological and clinical evidence, tumor phenotype. The authors think valid to use the following criteria in diagnosis of lymphoproliferative diseases: histological findings, clinical manifestations and blood picture, tumor cell cytology, primary location and predominant dissemination of the tumor, immunophenotype, characteristic chromosomal disorders, response to treatment.