Richter syndrome: A rare complication of chronic lymphocytic leukemia or small lymphocytic lymphoma

Richter's syndrome (RS) is a rare complication with an unfavorable prognosis, in which chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL) transform into a more aggressive type of lymphoma, most commonly into diffuse large B cell lymphoma (DLBCL) or less often into Hodgkin�...

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Bibliographic Details
Published in:Advances in clinical and experimental medicine : official organ Wroclaw Medical University 2018-12, Vol.27 (12), p.1683-1689
Main Authors: Wąsik-Szczepanek, Ewa, Szymczyk, Agnieszka, Szczepanek, Dariusz, Wszoła-Kleinrok, Joanna, Chocholska, Sylwia, Pluta, Andrzej, Hus, Marek
Format: Article
Language:English
Subjects:
Adult
Cell Transformation, Neoplastic
Child
Disease Progression
Female
Hodgkin Disease - diagnosis
Hodgkin Disease - genetics
Hodgkin Disease - pathology
Humans
Leukemia, Lymphocytic, Chronic, B-Cell - diagnosis
Leukemia, Lymphocytic, Chronic, B-Cell - genetics
Leukemia, Lymphocytic, Chronic, B-Cell - pathology
Lymphoma, Large B-Cell, Diffuse - diagnosis
Lymphoma, Large B-Cell, Diffuse - genetics
Lymphoma, Large B-Cell, Diffuse - pathology
Male
Prognosis
Retrospective Studies
ZAP-70 Protein-Tyrosine Kinase - genetics
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Summary:Richter's syndrome (RS) is a rare complication with an unfavorable prognosis, in which chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL) transform into a more aggressive type of lymphoma, most commonly into diffuse large B cell lymphoma (DLBCL) or less often into Hodgkin's lymphoma (HL). The objective of this research paper was to present a retrospective analysis of patients with CLL/SLL whose disease transformed into RS. The study included 217 patients (100 women and 107 men) with CLL/SLL diagnosed in the years 2006-2015 at the Department of Hematooncology and Bone Marrow Transplantation of the Medical University of Lublin, which transformed into RS. We analyzed clinical, laboratory, immunophenotypic (ZAP-70 and CD38 expression), histopathological, and genetic data (del(17p), del(11q)), which was collected at the time of CLL/SLL diagnosis, and some which was collected at the time of transformation. Richter's syndrome was diagnosed in 4.6% of all CLL and SLL patients. The group of patients with RS consisted of 9 patients with primary CLL and 1 patient with a diagnosis of SLL (8 patients with transformation into DLBCL and 2 patients with transformation into HL). Leukemic lymphocytes showed evidence of peripheral blood lymphocyte membrane expression of ZAP70+/CD38+ (1 patient), of ZAP-70+/CD38- (3 patients), of ZAP-70-/CD38- (1 patient), and of ZAP-70-/CD38+ (5 patients). The deletion of 11q (del(11q)) was documented in 2 patients. In 4 cases, the location of RS was extremely rare (the thyroid gland, liver, skin, bladder, and central nervous system). Richter's syndrome is a rare, but probable complication of CLL/SLL with an unfavorable prognosis, and it should be taken into account at every stage of the disease, particularly when the course of the disease is aggressive.
ISSN:1899-5276
2451-2680
DOI:10.17219/acem/75903