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Abstract
Richter syndrome (RS) or Richter transformation is the development of secondary aggressive lymphoma in the setting of underlying chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL). Most frequently CLL transforms into diffuse large B-cell lymphoma (DLBCL) (90%) and rarely (10%) into Hodgkin lymphoma, termed Hodgkin variant of Richter syndrome (HvRS). RS is generally characterized by an aggressive clinical course and poor prognosis. In recent years, major advances have been made in understanding genetic events which relate to the progression of CLL or transformation into RS. Better understanding of the molecular pathways has revealed that RS is not a single homogeneous entity. The majority of cases are clonally related to the original CLL clone, while a minority develop from an unrelated clone. This review summarizes new data relating to the molecular biology and the genetic/epigenetic changes occurring during Richter transformation, and also considers the clinical features and therapy for both DLBCL-RS and Hodgkin variant-RS.
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Affiliation(s)
- Krzysztof Jamroziak
- Department of Hematology, Institute of Hematology and Transfusion Medicine , Warsaw , Poland
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2
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Dalia S, Brayer J, Horna P, Zhang H, Pinilla-Ibarz J. Transformation to Hodgkin lymphoma in chronic lymphocytic leukemia coexisting with Epstein-Barr viremia. Leuk Lymphoma 2014; 55:2660-2. [PMID: 24528217 DOI: 10.3109/10428194.2014.894193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Samir Dalia
- Division of Hematological Malignancies, H. Lee Moffitt Cancer Center and Research Institute, and the University of South Florida , Tampa, FL , USA
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3
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Abstract
Second malignancies are frequent complications in patients with chronic lymphocytic leukemia (CLL). Patients with this leukemia may develop large cell lymphoma (LCL) known as Richter's syndrome (RS). RS occurs in CLL patients of about 3% and may develop in a single lymph node or more often in a group of nodes. However, in some patients extranodal localization of aggressive lymphoma in RS has been observed. Besides LCL, Hodgkin's disease, prolymphocytoid leukemia, multiple myeloma and acute lymphoblastic leukemia may also occur as RS variants. The origin of lymphoid cells in RS remains tentative. However, CLL and RS originate from the same clone for some patients, whereas, in other patients cells of aggressive lymphoma do not have the features of the same clone as the CLL cells. The prognosis of RS is poor. Survival in different studies will be usually 2-5 months. The secondary development or coexistence of myeloproliferative disorders or myelodysplastic syndrome and solid tumors have also been rarely documented in CLL patients. It is of great concern that therapy may further increase the risk of a second neoplasm. However, until now, there are no clear evidence that alkylating agents or purine nucleoside analogs may be associated with an increased incidence of second malignancies in patients with CLL. In this review, epidemiology, biology, clinical characteristic and treatment approaches in RS and other secondary neoplasms in patients with CLL are discussed.
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MESH Headings
- Cell Lineage
- Disease-Free Survival
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/complications
- Leukemia, Lymphocytic, Chronic, B-Cell/mortality
- Leukemia, Lymphocytic, Chronic, B-Cell/therapy
- Lymphoma, Large B-Cell, Diffuse/etiology
- Lymphoma, Large B-Cell, Diffuse/mortality
- Lymphoma, Large B-Cell, Diffuse/therapy
- Neoplasms, Second Primary/etiology
- Neoplasms, Second Primary/mortality
- Neoplasms, Second Primary/therapy
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Affiliation(s)
- Tadeusz Robak
- Department of Hematology, Medical University of Lodz and Copernicus Memorial Hospital, Lodz, Pabianicka, Poland.
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4
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Jamroziak K, Grzybowska-Izydorczyk O, Jesionek-Kupnicka D, Gora-Tybor J, Robak T. Poor prognosis of Hodgkin variant of Richter transformation in chronic lymphocytic leukemia treated with cladribine. Br J Haematol 2012; 158:286-288. [DOI: 10.1111/j.1365-2141.2012.09127.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - Tadeusz Robak
- Department of Haematology; Medical University of Lodz
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5
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Bockorny B, Codreanu I, Dasanu CA. Hodgkin lymphoma as Richter transformation in chronic lymphocytic leukaemia: a retrospective analysis of world literature. Br J Haematol 2011; 156:50-66. [DOI: 10.1111/j.1365-2141.2011.08907.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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6
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Abstract
Though B-chronic lymphocytic leukemia (CLL) is known to be a heterogeneous disease, only recently has the familial component of CLL been more thoroughly investigated. This entity is seen in approximately 5%-10% of all patients with CLL and can be associated with earlier age of diagnosis, higher female prevalence, and increased incidence of other lymphoproliferative disorders (LPDs), such as non-Hodgkin lymphoma and the more recently described monoclonal B-cell lymphocytosis CLL in family members. The prognostic parameters and clinical course of familial CLL is not clearly distinguishable from that of sporadic disease. In addition, it is not clear that the treatment responses for progressive disease has any discernible difference in familial versus sporadic CLL. The genetic etiology of CLL is unknown, and early work on familial CLL has not yet uncovered any obvious gene or group of genes that can be clearly related to the pathophysiology of CLL. However, the detailed genetic study of familial CLL is likely to be critical in uncovering relevant genes. At present it is best to indicate to concerned CLL patients that their relatives are at relatively low risk of developing CLL or other LPDs.
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Affiliation(s)
- Susan L Slager
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN 55905, USA
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7
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Almhanna K, Wongchaowart N, Sweetenham J. Intracerebral Hodgkin's lymphoma in a patient with chronic lymphocytic leukemia/small lymphocytic lymphoma: a case report and literature review. Cancer Invest 2009; 27:215-20. [PMID: 19235595 DOI: 10.1080/07357900802189824] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Richter's syndrome is defined as the transformation of low grade lymphoma to more aggressive high grade malignant form, usually diffuse large B cell lymphoma. Primary or metastatic cerebral Hodgkin's lymphoma and Hodgkin's lymphoma variant of Richter transformation are extremely rare. We report a case of 65-year old man who developed isolated intracerebral Hodgkin's lymphoma almost 8 years after the diagnosis of chronic lymphocytic leukemia/small lymphocytic lymphoma, and we reviewed the related literature. The patient had resection of his CNS lesion, followed by radiation and chemotherapy. The patient eventually died with progressive disease.
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Affiliation(s)
- Khaldoun Almhanna
- Department of Hematologic Oncology and Blood Disorders, Cleveland Clinic, Taussig Cancer Institute, Cleveland, Ohio 44195, USA.
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8
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Robak E, Jesionek-Kupnicka D, Robak T, Holub A, Wawrzyniak E, Bartkowiak J, Bednarek A, Constantinu M, Urbanska-Rys H. Primary cutaneous marginal zone B-cell lymphoma in a patient with chronic lymphocytic leukaemia. Br J Dermatol 2007; 157:591-5. [PMID: 17697078 DOI: 10.1111/j.1365-2133.2007.07923.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Primary cutaneous marginal zone B-cell lymphoma (PCMZL) is a low-grade malignant lymphoma that presents in the skin with no evidence of extracutaneous localization at diagnosis. We present an 80-year-old woman with B-cell chronic lymphocytic leukaemia (CLL) who developed multifocal PCMZL lesions 14 months after CLL diagnosis. PCMZL was clonally similar to the original bone marrow (BM) CLL cells. The specific translocation t(14;18) (q32;q21) with breakpoints in IGH and BCL2 loci was found in a skin specimen, but was absent in BM and peripheral blood (PB) cells. In contrast, a 13q deletion was found in BM and PB CLL cells. The patient was treated with chlorambucil and complete response of PCMZL was achieved. To our knowledge this is the first patient with CLL in whom PCMZL has been diagnosed.
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MESH Headings
- Aged, 80 and over
- Antineoplastic Agents, Alkylating/therapeutic use
- Chlorambucil/therapeutic use
- Chromosome Deletion
- Chromosomes, Human, Pair 14
- Chromosomes, Human, Pair 18
- Female
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Lymphoma, B-Cell/drug therapy
- Lymphoma, B-Cell/genetics
- Lymphoma, B-Cell/pathology
- Skin Neoplasms/drug therapy
- Skin Neoplasms/genetics
- Skin Neoplasms/pathology
- Translocation, Genetic
- Treatment Outcome
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Affiliation(s)
- E Robak
- Department of Dermatology, Medical University of Łodz, Łodz, Poland
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9
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Roddie C, Cwynarski K, Craig C, Diss T, McNamara C. Hodgkin transformation of newly diagnosed small lymphocytic lymphoma in the gastrointestinal tract. Leuk Lymphoma 2007; 48:1644-6. [PMID: 17701601 DOI: 10.1080/10428190701420459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Karp JE, Ricklis RM, Balakrishnan K, Briel J, Greer J, Gore SD, Smith BD, McDevitt MA, Carraway H, Levis MJ, Gandhi V. A phase 1 clinical-laboratory study of clofarabine followed by cyclophosphamide for adults with refractory acute leukemias. Blood 2007; 110:1762-9. [PMID: 17562873 PMCID: PMC1976362 DOI: 10.1182/blood-2007-03-081364] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Clofarabine has shown impressive response rates in patients with acute leukemias. In vitro investigations with clofarabine in combination with cyclophosphamide in primary cells have demonstrated synergistic cytotoxicity and inhibition of DNA repair. Based on these clinical and laboratory observations, we designed a mechanism-based combination protocol with clofarabine and cyclophosphamide for patients with relapsed acute leukemias. Eighteen patients were treated with cyclophosphamide (200 mg/m(2)) alone on day 0 and with clofarabine plus cyclophosphamide on day 1. Clinical responses, toxicity, DNA damage measured as H2AX phosphorylation, and accumulation of clofarabine triphosphate (TP) were analyzed. At dose level 1 (20 mg/m(2) clofarabine + cyclophosphamide, 6 patients) and dose level 0 (10 mg/m(2) clofarabine + cyclophosphamide, 12 patients) overall response rates were 50% and 30%, respectively, with responses in 4 (67%) of 6 patients with refractory acute lymphoblastic leukemia. Dose-limiting toxicity occurred at dose level 1 with prolonged marrow aplasia. Four (22%) patients died from prolonged aplasia (1), fungal pneumonia (1), or multiorgan failure (2). In 12 of 13 patient samples, increased DNA damage (gammaH2AX) was observed with clofarabine and cyclophosphamide compared with cyclophosphamide alone. In conclusion, pharmacodynamic end points along with clinical results suggest usefulness of this combination strategy, whereas toxicity data suggest reduction in chemotherapeutic intensity. This clinical trial is registered with the National Cancer Institute's PDQ at www.clinicaltrials.gov as no. JHOC-J0561.
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Affiliation(s)
- Judith E Karp
- Division of Hematologic Malignancies, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD 21231-1000, USA.
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11
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Abstract
Classic Hodgkin lymphoma (CHL) in patients with underlying immunodeficiency disorders frequently differs from that in the immune competent population in terms of its clinical behavior and pathologic features. Moreover, differential from Hodgkin-like lymphoid proliferations may be problematic. Topics under review include: (a) CHL posttransplant lymphoproliferative disorders, (b) CHL in HIV/AIDS, (c) Hodgkin variant of Richter syndrome in chronic lymphocytic leukemia in association with fludarabine therapy, (d) CHL in other immunodeficiency states including methotrexate-associated lymphoproliferative disorder in patients with rheumatoid arthritis and primary immune deficiencies, and (e) Hodgkin-like lymphoid proliferations including senile Epstein-Barr virus+ B-cell lymphoproliferative disorder. Also under consideration is the pathogenesis of these disorders with an emphasis on the role of Epstein-Barr virus.
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Affiliation(s)
- Jonathan W Said
- David Geffen School of Medicine at UCLA, Department of Pathology and Laboratory Medicine UCLA Medical Center, Los Angeles, CA 90095, USA.
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12
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Niscola P, Principe MID, Palombi M, Fratoni S, Piccioni D, Maurillo L, de Fabritiis P, Amadori S, Del Poeta G. Hodgkin lymphoma in a mutated ZAP-70 negative B-cell Chronic Lymphocytic Leukemia patient. Leuk Res 2007; 32:363-5. [PMID: 17449094 DOI: 10.1016/j.leukres.2007.03.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2007] [Revised: 02/23/2007] [Accepted: 03/02/2007] [Indexed: 10/23/2022]
MESH Headings
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Murine-Derived
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Fatal Outcome
- Hodgkin Disease/drug therapy
- Hodgkin Disease/genetics
- Hodgkin Disease/pathology
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Male
- Middle Aged
- Mutation
- Neoplasms, Second Primary/pathology
- Rituximab
- Vidarabine/analogs & derivatives
- Vidarabine/therapeutic use
- ZAP-70 Protein-Tyrosine Kinase/metabolism
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13
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Tsimberidou AM, O'Brien S, Kantarjian HM, Koller C, Hagemeister FB, Fayad L, Lerner S, Bueso-Ramos CE, Keating MJ. Hodgkin transformation of chronic lymphocytic leukemia. Cancer 2006; 107:1294-302. [PMID: 16902984 DOI: 10.1002/cncr.22121] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Hodgkin transformation is a rare complication of chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL). In this study, the authors assessed the incidence, presenting characteristics, and outcomes of patients with CLL/SLL who developed Hodgkin lymphoma (HL). METHODS An electronic database search of patients with CLL/SLL who presented at The University of Texas M. D. Anderson Cancer Center Department of Leukemia between 1975 and 2005 was performed. RESULTS Among 4121 patients with CLL/SLL, 18 patients (0.4%) developed HL. Presenting features included B-symptoms (67%), lymph node enlargement (79%), splenomegaly (43%), hepatomegaly (29%), hypercalcemia (6%), infection (6%), and mental status changes (6%). The median age was 72 years (range, 49-81 years), and there was a male preponderance (78%). The median time from CLL to HL diagnosis was 4.6 years (range, 0-12.9 years). Fourteen patients (78%) had been previously treated for CLL/SLL. Ten patients (56%) had received >1 prior therapy. The median beta2-microglobulin level was 4.5 mg/L, and the median lactate dehydrogenase level was 610 IU/L. Epstein-Barr virus (EBV) was positive by in situ hybridization for EBV-encoded RNA in 3 of 4 tested patients. Fourteen patients (78%) received chemotherapy. The overall response rate was 44% (complete response rate, 19%). The median overall survival duration was 0.8 years (range, 0.03 years-6.7+ years). The median failure-free survival (FFS) duration was 0.4 years. CONCLUSIONS The rates of response, survival, and FFS in patients with Hodgkin transformation of CLL/SLL were inferior to those reported in patients with de novo HL and were similar to those in patients with Richter syndrome.
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14
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Abstract
Richter's transformation denotes the development of high-grade non-Hodgkin lymphoma, prolymphocytic leukemia, Hodgkin disease, or acute leukemia in patients with chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma. A search of published articles in Medline (PubMed) and abstracts from professional meetings was performed. An electronic database search of patients with CLL at The University of Texas M. D. Anderson Cancer Center (Houston, TX) determined the incidence of Richter syndrome (RS) in patients with CLL between 1992 and 2002. RS occurs in approximately 5% of patients with CLL. The large cells of RS may arise through transformation of the original CLL clone or represent a new neoplasm. RS may be triggered by viral infections, such as Epstein-Barr virus. Trisomy 12 and chromosome 11 abnormalities are more frequent in patients with RS than in the overall population of patients with CLL. Multiple genetic defects, such as mutations of the p53 tumor suppressor gene, p16INK4A, and p21, loss of p27 expression, deletion of retinoblastoma, increased copy number of C-MYC, and decreased expression of the A-MYB gene, have been described. These abnormalities may cause CLL cells to proliferate and-by facilitating the acquisition of new genetic abnormalities-to transform into RS cells. Therapeutic strategies include intensive chemotherapy, monoclonal antibodies, and stem cell transplantation. The response rates range from 5% to 43% (complete response, 5-38%), and the median survival duration ranges from 5 months to 8 months. In conclusion, RS may be triggered by viral infections or by genetic defects. Current treatments are aggressive, but prognosis is poor. Novel curative treatment strategies are needed.
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MESH Headings
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Combined Modality Therapy
- Female
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/diagnosis
- Leukemia, Lymphocytic, Chronic, B-Cell/epidemiology
- Leukemia, Lymphocytic, Chronic, B-Cell/therapy
- Lymphoma, Non-Hodgkin/diagnosis
- Lymphoma, Non-Hodgkin/epidemiology
- Lymphoma, Non-Hodgkin/therapy
- Male
- Prognosis
- Risk Assessment
- Severity of Illness Index
- Stem Cell Transplantation/methods
- Survival Analysis
- Syndrome
- Treatment Outcome
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15
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Robak T. The place of cladribine in the treatment of chronic lymphocytic leukemia: a 10-year experience in Poland. Ann Hematol 2004; 84:63-70. [PMID: 15558283 DOI: 10.1007/s00277-004-0974-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2004] [Accepted: 10/19/2004] [Indexed: 11/30/2022]
Abstract
Cladribine (2-CdA) is structurally similar to another purine analog, fludarabine (FA), recently accepted in several centers as the first-line treatment in chronic lymphocytic leukemia (CLL). Unfortunately, there is less experience with the use of 2-CdA than with FA in patients with CLL in the majority of Western countries. In the last decade we performed several phase II studies and two phase III randomized trials to evaluate the activity and toxicity of 2-CdA in previously treated and untreated patients with CLL. We have also compared the results of Polish studies with the data presented by other investigators. Similarly to FA this agent has been found to be more effective in previously untreated CLL than in patients refractory to or relapsed after conventional therapy with alkylating agents. In different studies the overall response (OR) rate ranged from 70 to 85% and complete response (CR) from 10 to 47%. Higher CR and OR rates in CLL patients treated with 2-CdA and prednisone than with chlorambucil and prednisone were confirmed in our multicenter, randomized study. Subsequently, we performed a multicenter, randomized study comparing 2-CdA alone with a combination of 2-CdA and cyclophosphamide (CC) or cyclophosphamide and mitoxantrone (CMC). Our updated results seem to indicate that the CC program used as a first-line therapy in CLL gives higher CR and OR and better elimination of minimal residual disease (MRD) than 2-CdA alone. CC is also less myelotoxic than CMC. More recently, we have undertaken a phase II study to determine the efficacy and toxicity of 2-CdA combined with the anti-CD20 monoclonal antibody rituximab in CLL and other refractory or relapsed indolent lymphoproliferative disorders. The preliminary results seem to be better than in similar patients previously treated in our institution with 2-CdA alone. In conclusion, the studies performed in the last decade in Poland and other countries have shown that 2-CdA used alone or in combination with other agents is, similarly to FA, a highly active and relatively safe agent in previously treated and untreated patients with CLL.
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MESH Headings
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Cladribine/adverse effects
- Cladribine/therapeutic use
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/complications
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/mortality
- Neoplasms, Second Primary/etiology
- Poland
- Randomized Controlled Trials as Topic
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Affiliation(s)
- Tadeusz Robak
- Department of Hematology, Medical University of Lodz and Copernicus Memorial Hospital, 93-513, Pabianicka 62 str, Lodz, Poland.
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16
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Abstract
Second malignancies occur with increased frequency in patients with chronic lymphocytic leukemia (CLL) regardless of treatment, but they may be more frequent and more aggressive after nucleoside analog therapy of CLL. In as many as 33% of patients with CLL who develop a second malignancy, a spontaneous remission of CLL precedes the diagnosis of the second malignancy by months or years. Richter's syndrome, whether manifested by anaplastic large cell lymphoma or Hodgkin's disease, is not truly a second malignancy because the CLL clone appears to be involved. However, all other malignancies developing in patients with CLL appear to be derived from a different clone. CLL and the second malignancy may have a common viral etiology. Second malignancies in patients with CLL should be treated as they would be in patients without CLL.
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Affiliation(s)
- Peter H Wiernik
- Our Lady of Mercy Cancer Center, 600 East 233rd Street, Bronx, NY 10466, USA.
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17
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Robak T, Blonski JZ, Gora-Tybor J, Kasznicki M, Konopka L, Ceglarek B, Komarnicki M, Lewandowski K, Hellmann A, Lewandowski K, Moskwa A, Dmoszyńska A, Sokołowska B, Dwilewicz-Trojaczek A, Tomaszewska A, Sułek K, Całbecka M. Second malignancies and Richter's syndrome in patients with chronic lymphocytic leukaemia treated with cladribine. Eur J Cancer 2004; 40:383-9. [PMID: 14746857 DOI: 10.1016/j.ejca.2003.09.031] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The increased frequency of second malignancies in chronic lymphocytic leukaemia (CLL) is well known. Moreover, antineoplastic therapy additionally increases the risk of secondary cancers. In this study, we analysed whether treatment with cladribine (2-chlorodeoxyadenosine, 2-CdA) during the course of CLL had an impact on the subsequent occurrence of either secondary solid tumours or Richter's syndrome. There were 1487 eligible patients, 251 treated with 2-CdA alone, 913 treated with alkylating agents (AA)-based regimens alone and 323 treated with both 2-CdA and AA. Median time from the start of CLL treatment to the diagnosis of secondary malignancy was 1.9 years (0.5-5.1 years) for the 2-CdA group, 1.8 years (0.3-7.9 years) for the AA group and 3.9 years (0.3-8.4 years) for the 2-CdA+AA group. A total of 68 malignancies were reported in 65 patients. Ten events were non-melanotic skin cancers and were excluded from the analysis, leaving 58 events in 58 patients. In the group of patients treated with 2-CdA alone, there were 15 (6.0%) cases, in the group of patients treated with AA alone there were 26 (2.8%) cases, and in the group treated with 2-CdA+AA there were 17 (5.3%) cases of secondary malignancies. The differences between the frequency of secondary malignancies in the 2-CdA and 2-CdA+AA versus AA alone groups were not significant (P=0.05 and P=0.06, respectively). Only lung cancers occurred significantly more frequently in the 2-CdA (2.8%) and 2-CdA+AA (2.2%) treated groups compared with the AA patients (0.3%) (P<0.001 and P<0.01, respectively). In conclusion, 2-CdA in CLL patients does not seem to increase the risk of secondary malignancies except for lung cancers. However, further studies are necessary to establish the real risk of lung cancer in CLL patients treated with 2-CdA.
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Affiliation(s)
- T Robak
- Department of Haematology, Medical University of Łódź and Copernicus Memorial Hospital, Pabianicka 62, 93-513, ul. Pabianicka 62, Łódź, Poland.
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