Medicine:Waldenström macroglobulinemia

From HandWiki
Short description: Type of blood cancer
Waldenström macroglobulinemia
Other namesLymphoplasmacytic lymphoma
SpecialtyHematology and oncology

Waldenström macroglobulinemia (/ˈvældənstrɒm ˌmækrˌɡlɒbjəlɪˈnmiə/ VAL-dən-strom MAK-roh-GLOB-yə-lin-EE-mee-ə,[1][2] US also /ˈvɑːldənstrɛm -/ VAHL-dən-strem -⁠[3]) is a type of cancer affecting two types of B cells: lymphoplasmacytoid cells and plasma cells. Both cell types are white blood cells. It is characterized by having high levels of a circulating antibody, immunoglobulin M (IgM), which is made and secreted by the cells involved in the disease. Waldenström macroglobulinemia is an "indolent lymphoma" (i.e., one that tends to grow and spread slowly) and a type of lymphoproliferative disease which shares clinical characteristics with the indolent non-Hodgkin lymphomas.[4] It is commonly classified as a form of plasma cell dyscrasia, similar to other plasma cell dyscrasias that, for example, lead to multiple myeloma. Waldenström macroglobulinemia is commonly preceded by two clinically asymptomatic but progressively more pre-malignant phases, IgM monoclonal gammopathy of undetermined significance and smoldering Waldenström macroglobulinemia. The Waldenström macroglobulinemia spectrum of dysplasias differs from other spectrums of plasma cell dyscrasias in that it involves not only aberrant plasma cells but also aberrant lymphoplasmacytoid cells and that it involves IgM while other plasma dyscrasias involve other antibody isoforms.[5][6]

Waldenström macroglobulinemia is a rare disease, with only about 1,500 cases per year in the United States . It occurs more frequently in older adults.[7] While the disease is incurable, it is treatable. Because of its indolent nature, many patients are able to lead active lives, and when treatment is required, may experience years of symptom-free remission.[8]

Signs and symptoms

Signs and symptoms of Waldenström macroglobulinemia include weakness, fatigue, weight loss, and chronic oozing of blood from the nose and gums.[9] Peripheral neuropathy occurs in 10% of patients. Enlargement of the lymph nodes, spleen, and/or liver are present in 30–40% of cases.[10] Other possible signs and symptoms include blurring or loss of vision, headache, and (rarely) stroke or coma.[citation needed]

Causes

Waldenström macroglobulinemia is characterized by an uncontrolled clonal proliferation of terminally differentiated B lymphocytes. The most commonly associated mutations, based on whole-genome sequencing of 30 patients, are a somatic mutation in MYD88 (90% of patients) and a somatic mutation in CXCR4 (27% of patients).[11] CXCR4 mutations cause symptomatic hyperviscosity syndrome and high bone marrow activity characteristic of the disease.[12] However, CXCR4 mutation is not associated with splenomegaly, high platelet counts, or different response to therapy, questioning the relevance of CXCR4 in treating patients.[12] An association has been demonstrated with the locus 6p21.3 on chromosome 6.[13] There is a two- to threefold increased risk of Waldenström macroglobulinemia in people with a personal history of autoimmune diseases with autoantibodies, and a particularly elevated risk associated with liver inflammation, human immunodeficiency virus, and rickettsiosis.[14]

There are genetic factors, with first-degree relatives of Waldenström macroglobulinemia patients shown to have a highly increased risk of also developing the disease.[15] There is also evidence to suggest that environmental factors, including exposure to farming, pesticides, wood dust, and organic solvents, may influence the development of Waldenström macroglobulinemia.[16]

Genetics

Although believed to be a sporadic disease, studies have shown increased susceptibility within families, indicating a genetic component.[17][18] A mutation in gene MYD88 has been found to occur frequently in patients.[19] Waldenström macroglobulinemia cells show only minimal changes in cytogenetic and gene expression studies. Their miRNA signature however differs from their normal counterpart. It is therefore believed that epigenetic modifications play a crucial role in the disease.[20]

Comparative genomic hybridization identified the following chromosomal abnormalities: deletions of 6q23 and 13q14, and gains of 3q13-q28, 6p and 18q.[21] FGFR3 is overexpressed.[22] The following signalling pathways have been implicated:

The protein Src tyrosine kinase is overexpressed in Waldenström macroglobulinemia cells compared with control B cells.[32] Inhibition of Src arrests the cell cycle at phase G1 and has little effect on the survival of Waldenström macroglobulinemia or normal cells.

MicroRNAs involved in Waldenström:[33][34]

MicroRNA-155 regulates the proliferation and growth of Waldenström macroglobulinemia cells in vitro and in vivo, by inhibiting MAPK/ERK, PI3/AKT, and NF-κB pathways.[citation needed]

In Waldenström macroglobulinemia cells, histone deacetylases and histone-modifying genes are de-regulated.[42] Bone marrow tumour cells express the following antigen targets CD20 (98.3%), CD22 (88.3%), CD40 (83.3%), CD52 (77.4%), IgM (83.3%), MUC1 core protein (57.8%), and 1D10 (50%).[43]

Pathophysiology

Symptoms including blurring or loss of vision, headache, and (rarely) stroke or coma are due to the effects of the IgM paraprotein, which may cause autoimmune phenomena or cryoglobulinemia. Other symptoms of Waldenström macroglobulinemia are due to hyperviscosity syndrome, which is present in 6–20% of patients.[44][45][46][47] This is attributed to the IgM monoclonal protein molecules increasing the viscosity of the blood by forming aggregates to each other, binding water through their carbohydrate component and by their interaction with blood cells.[48]

Diagnosis

A diagnosis of Waldenström macroglobulinemia depends on a significant monoclonal IgM spike evident in blood tests and malignant cells consistent with the disease in bone marrow biopsy samples.[49] Blood tests show the level of IgM in the blood and the presence of proteins, or tumor markers, that are the key signs of Waldenström macroglobulinemia. A bone marrow biopsy provides a sample of bone marrow, usually from the lower back of the pelvis bone. The sample is extracted through a needle and examined under a microscope. A pathologist identifies the particular lymphocytes that indicate Waldenström macroglobulinemia. Flow cytometry may be used to examine markers on the cell surface or inside the lymphocytes.[50]

Additional tests such as computed tomography (CT or CAT) scan may be used to evaluate the chest, abdomen, and pelvis, particularly swelling of the lymph nodes, liver, and spleen. A skeletal survey can help distinguish between Waldenström macroglobulinemia and multiple myeloma.[50] Anemia occurs in about 80% of patients with Waldenström macroglobulinemia. A low white blood cell count, and low platelet count in the blood may be observed. A low level of neutrophils (a specific type of white blood cell) may also be found in some individuals with Waldenström macroglobulinemia.[49]

Chemistry tests include lactate dehydrogenase (LDH) levels, uric acid levels, erythrocyte sedimentation rate (ESR), kidney and liver function, total protein levels, and an albumin-to-globulin ratio. The ESR and uric acid level may be elevated. Creatinine is occasionally elevated and electrolytes are occasionally abnormal. A high blood calcium level is noted in approximately 4% of patients. The LDH level is frequently elevated, indicating the extent of Waldenström macroglobulinemia–related tissue involvement. Rheumatoid factor, cryoglobulins, direct antiglobulin test and cold agglutinin titre results can be positive. Beta-2 microglobulin and C-reactive protein test results are not specific for Waldenström macroglobulinemia. Beta-2 microglobulin is elevated in proportion to tumor mass. Coagulation abnormalities may be present. Prothrombin time, activated partial thromboplastin time, thrombin time, and fibrinogen tests should be performed. Platelet aggregation studies are optional. Serum protein electrophoresis results indicate evidence of a monoclonal spike but cannot establish the spike as IgM. An M component with beta-to-gamma mobility is highly suggestive of Waldenström macroglobulinemia. Immunoelectrophoresis and immunofixation studies help identify the type of immunoglobulin, the clonality of the light chain, and the monoclonality and quantitation of the paraprotein. High-resolution electrophoresis and serum and urine immunofixation are recommended to help identify and characterize the monoclonal IgM paraprotein. The light chain of the monoclonal protein is usually the kappa light chain. At times, patients with Waldenström macroglobulinemia may exhibit more than one M protein. Plasma viscosity must be measured. Results from characterization studies of urinary immunoglobulins indicate that light chains (Bence Jones protein), usually of the kappa type, are found in the urine. Urine collections should be concentrated. Bence Jones proteinuria is observed in approximately 40% of patients and exceeds 1 g/d in approximately 3% of patients. Patients with findings of peripheral neuropathy should have nerve conduction studies and antimyelin associated glycoprotein serology.[citation needed]

Criteria for diagnosis of Waldenström macroglobulinemia include:

  1. IgM monoclonal gammopathy that excludes chronic lymphocytic leukemia and Mantle cell lymphoma
  2. Evidence of anemia, constitutional symptoms, hyperviscosity, swollen lymph nodes, or enlargement of the liver and spleen that can be attributed to an underlying lymphoproliferative disorder.[51]

Treatment

There is no single accepted treatment for Waldenström macroglobulinemia.[52] There is marked variation in clinical outcome due to gaps in knowledge of the disease's molecular basis. Objective response rates are high (> 80%) but complete response rates are low (0–15%).[53] The medication ibrutinib targets the MYD88 L265P mutation induced activation of Bruton's tyrosine kinase.[54] In a cohort study of previously treated patients, ibrutinib induced responses in 91% of patients, and at 2 years 69% of patients had no progression of disease and 95% were alive.[55] Based on this study, the Food and Drug Administration approved ibrutinib for use in Waldenström macroglobulinemia in 2015.[56]

There are different treatment flowcharts: Treon[57] and mSMART.[58][clarification needed]

Patients with Waldenström macroglobulinemia are at higher risk of developing second cancers than the general population, but it is not yet clear whether treatments are contributory.[59]

Watchful waiting

In the absence of symptoms, many clinicians will recommend simply monitoring the patient;[60] Waldenström himself stated "let well do" for such patients. These asymptomatic cases are now classified as two successively more pre-malignant phases, IgM monoclonal gammopathy of undetermined significance and smoldering Waldenström macroglobulinemia.[5][6] But on occasion, the disease can be fatal, as it was to the French president Georges Pompidou, who died in office in 1974, six years after the discovery of his cancer. Mohammad Reza Shah Pahlavi, the Shah of Iran, also had Waldenström macroglobulinemia, which resulted in his ill-fated trip to the United States for therapy in 1979, leading to the Iran hostage crisis.[61]

First-line

Should treatment be started it should address both the paraprotein level and the lymphocytic B-cells.[62]

In 2002, a panel at the International Workshop on Waldenström's Macroglobulinemia agreed on criteria for the initiation of therapy. They recommended starting therapy in patients with constitutional symptoms such as recurrent fever, night sweats, fatigue due to anemia, weight loss, progressive symptomatic lymphadenopathy or spleen enlargement, and anemia due to bone marrow infiltration. Complications such as hyperviscosity syndrome, symptomatic sensorimotor peripheral neuropathy, systemic amyloidosis, kidney failure, or symptomatic cryoglobulinemia were also suggested as indications for therapy.[63]

Treatment includes the monoclonal antibody rituximab, sometimes in combination with chemotherapeutic drugs such as chlorambucil, cyclophosphamide, or vincristine or with thalidomide.[64] Corticosteroids, such as prednisone, may also be used in combination. Plasmapheresis can be used to treat the hyperviscosity syndrome by removing the paraprotein from the blood, although it does not address the underlying disease.[65] Ibrutinib is another agent that has been approved for use in this condition. Combination treatment with Ibrutinib and Rituximab showed significantly higher disease progression free survival than with just Rituximab treatment.[66]

Autologous bone marrow transplantation is a treatment option.[67][68][69][70]

Zanubrutinib is indicated for the treatment of adults with Waldenström macroglobulinemia.[71]

Salvage therapy

When primary or secondary resistance invariably develops, salvage therapy is considered. Allogeneic stem cell transplantation can induce durable remissions for heavily pre-treated patients.[72]

Drug pipeline

As of October 2010, there have been a total of 44 clinical trials on Waldenström macroglobulinemia, excluding transplantation treatments. Of these, 11 were performed on previously untreated patients, 14 in patients with relapsed or refractory Waldenström.[73] A database of clinical trials investigating Waldenström macroglobulinemia is maintained by the National Institutes of Health in the US.[74]

Patient stratification

Patients with polymorphic variants (alleles) FCGR3A-48 and -158 were associated with improved categorical responses to rituximab-based treatments.[75]

Prognosis

Current medical treatments result in survival of some longer than 10 years; in part this is because better diagnostic testing means early diagnosis and treatments. Older diagnosis and treatments resulted in published reports of median survival of approximately 5 years from time of diagnosis.[4] Currently, median survival is 6.5 years.[76] In rare instances, Waldenström macroglobulinemia progresses to multiple myeloma.[77]

The International Prognostic Scoring System for Waldenström's Macroglobulinemia is a predictive model to characterise long-term outcomes.[78][79] According to the model, factors predicting reduced survival[80] are:

  • Age > 65 years
  • Hemoglobin ≤ 11.5 g/dL
  • Platelet count ≤ 100×109/L
  • B2-microglobulin > 3 mg/L
  • Serum monoclonal protein concentration > 70 g/L

The risk categories are:

  • Low: ≤ 1 adverse variable except age
  • Intermediate: 2 adverse characteristics or age > 65 years
  • High: > 2 adverse characteristics

Five-year survival rates for these categories are 87%, 68% and 36%, respectively.[81] The corresponding median survival rates are 12, 8, and 3.5 years.[82]

The International Prognostic Scoring System for Waldenström's Macroglobulinemia has been shown to be reliable.[83] It is also applicable to patients on a rituximab-based treatment regimen.[81] An additional predictive factor is elevated serum lactate dehydrogenase (LDH).[84]

Epidemiology

Of cancers involving the lymphocytes, 1% of cases are Waldenström macroglobulinemia.[85] A rare disorder, there are fewer than 1,500 cases occurring in the United States annually.Template:Global The median age of onset is between 60 and 65 years, with some cases occurring in late teens. Notable victims of the disease include dancer/choreographer Gower Champion, who died of the disease in 1980, aged 61;[4][10] and former French President Georges Pompidou.

History

Waldenström macroglobulinemia was first described by Jan G. Waldenström (1906–1996) in 1944 in two patients with bleeding from the nose and mouth, anemia, decreased levels of fibrinogen in the blood (hypofibrinogenemia), swollen lymph nodes, neoplastic plasma cells in bone marrow, and increased viscosity of the blood due to increased levels of a class of heavy proteins called macroglobulins.[86]

For a time, Waldenström macroglobulinemia was considered to be related to multiple myeloma because of the presence of monoclonal gammopathy and infiltration of the bone marrow and other organs by plasmacytoid lymphocytes. The new World Health Organization (WHO) classification, however, places Waldenström macroglobulinemia under the category of lymphoplasmacytic lymphomas, itself a subcategory of the indolent (low-grade) non-Hodgkin lymphomas.[87] Since the 1990s, there have been significant advances in the understanding and treatment of Waldenström macroglobulinemia.[53]

See also

References

  1. "Waldenström macroglobulinemia". Cambridge Dictionary. Cambridge University. https://dictionary.cambridge.org/dictionary/english/waldenstrom-macroglobulinemia. 
  2. "Macroglobulinemia". Merriam-Webster Dictionary. https://www.merriam-webster.com/dictionary/macroglobulinemia. Retrieved 24 September 2020. 
  3. "Waldenström's macroglobulinemia". Merriam-Webster Dictionary. https://www.merriam-webster.com/dictionary/Waldenstr%C3%B6m%27s+macroglobulinemia. Retrieved 24 September 2020. 
  4. 4.0 4.1 4.2 Cheson BD (2006). "Chronic Lymphoid Leukemias and Plasma Cell Disorders". ACP Medicine. New York, NY: WebMD Professional Publishing. ISBN 978-0-9748327-1-5. 
  5. 5.0 5.1 "Diagnosis, risk stratification and management of monoclonal gammopathy of undetermined significance and smoldering multiple myeloma". International Journal of Laboratory Hematology 38 (Suppl 1): 110–22. 2016. doi:10.1111/ijlh.12504. PMID 27161311. 
  6. 6.0 6.1 "New developments in the management of Waldenström macroglobulinemia". Cancer Management and Research 9: 73–83. 2017. doi:10.2147/CMAR.S94059. PMID 28331368. 
  7. "Waldenstrom macroglobulinemia" (in en). Genetic and Rare Diseases Information Center (GARD) – an NCATS Program. https://rarediseases.info.nih.gov/diseases/7872/waldenstrom-macroglobulinemia. 
  8. International Waldenstrom's Macroglobulinemia Foundation. "Living with Waldenstrom's Macroglobulinemia".
  9. Kyle RA (1998). "Chapter 94: Multiple Myeloma and the Dysproteinemias". in Stein JH. Internal Medicine (5th ed.). New York: C.V.Mosby. ISBN 978-0-8151-8698-4. 
  10. 10.0 10.1 "Plasma Cell Tumors". Holland-Frei Cancer Medicine (6th ed.). New York, NY: B.C. Decker. 2003. ISBN 978-1-55009-213-4. https://archive.org/details/cancermedicine60002unse. 
  11. Hunter, Z. R.; Xu, L.; Yang, G.; Zhou, Y.; Liu, X.; Cao, Y.; Manning, R. J.; Tripsas, C. et al. (2013). "The genomic landscape of Waldenstrom macroglobulinemia is characterized by highly recurring MYD88 and WHIM-like CXCR4 mutations, and small somatic deletions associated with B-cell lymphomagenesis". Blood 123 (11): 1637–46. doi:10.1182/blood-2013-09-525808. PMID 24366360. 
  12. 12.0 12.1 Castillo, Jorge J.; Moreno, David F.; Arbelaez, Zachary R.; Treon, Steven P. (2019). "CXCR4 mutations affect presentation and outcomes in patients with Waldenström macroglobulinemia: A systematic review". Expert Review of Hematology 12 (10): 873–881. doi:10.1080/17474086.2019.1649132. PMID 31343930. 
  13. Schop, Roelandt F.J.; Van Wier, Scott A.; Xu, Ruifang et al. (2006). "6q deletion discriminates Waldenström macroglobulinemia from IgM monoclonal gammopathy of undetermined significance". Cancer Genet. Cytogenet. 169 (2): 150–3. doi:10.1016/j.cancergencyto.2006.04.009. PMID 16938573. 
  14. Koshiol, J.; Gridley, G.; Engels, E.; McMaster, M.; Landgren, O. (2008). "Chronic immune stimulation and subsequent Waldenström macroglobulinemia". Archives of Internal Medicine 168 (17): 1903–1909. doi:10.1001/archinternmed.2008.4. PMID 18809818. 
  15. Kristinsson, S.; Björkholm, M.; Goldin, L.; McMaster, M.; Turesson, I.; Landgren, O. (2008). "Risk of lymphoproliferative disorders among first-degree relatives of lymphoplasmacytic lymphoma/Waldenstrom macroglobulinemia patients: a population-based study in Sweden". Blood 112 (8): 3052–3056. doi:10.1182/blood-2008-06-162768. PMID 18703425. 
  16. Royer, R.; Koshiol, J.; Giambarresi, T.; Vasquez, L.; Pfeiffer, R.; McMaster, M. (2010). "Differential characteristics of Waldenström macroglobulinemia according to patterns of familial aggregation". Blood 115 (22): 4464–4471. doi:10.1182/blood-2009-10-247973. PMID 20308603. 
  17. McMaster, M. (2003). "Familial Waldenstrom's macroglobulinemia". Seminars in Oncology 30 (2): 146–152. doi:10.1053/sonc.2003.50063. PMID 12720125. https://zenodo.org/record/1236002. 
  18. McMaster, M.; Goldin, L.; Bai, Y.; Ter-Minassian, M.; Boehringer, S.; Giambarresi, T.; Vasquez, L.; Tucker, M. (2006). "Genomewide linkage screen for Waldenstrom macroglobulinemia susceptibility loci in high-risk families". American Journal of Human Genetics 79 (4): 695–701. doi:10.1086/507687. PMID 16960805. 
  19. Treon, S. P.; Xu, L.; Yang, G.; Zhou, Y.; Liu, X.; Cao, Y.; Sheehy, P.; Manning, R. J. et al. (2012). "MYD88 L265P Somatic Mutation in Waldenström's Macroglobulinemia". New England Journal of Medicine 367 (9): 826–833. doi:10.1056/NEJMoa1200710. PMID 22931316. 
  20. Sacco, A.; Issa, G. C.; Zhang, Y.; Liu, Y.; Maiso, P.; Ghobrial, I. M.; Roccaro, A. M. (2010). "Epigenetic modifications as key regulators of Waldenstrom's Macroglobulinemia biology". Journal of Hematology & Oncology 3: 38. doi:10.1186/1756-8722-3-38. PMID 20929526. 
  21. Braggio, E.; Keats, J. J.; Leleu, X.; Van Wier, S. V.; Jimenez-Zepeda, V. H.; Schop, R. F. J.; Chesi, M.; Barrett, M. et al. (2009). "High-Resolution Genomic Analysis in Waldenström's Macroglobulinemia Identifies Disease-Specific and Common Abnormalities with Marginal Zone Lymphomas". Clinical Lymphoma, Myeloma & Leukemia 9 (1): 39–42. doi:10.3816/CLM.2009.n.009. PMID 19362969. 
  22. Azab, A. K.; Azab, F.; Quang, P.; Maiso, P.; Sacco, B.; Ngo, A.; Liu, H. T.; Zhang, Y. et al. (2011). "FGFR3 is overexpressed Waldenstrom macroglobulinemia and its inhibition by Dovitinib induces apoptosis, and overcomes stroma-induced proliferation". Clinical Cancer Research 17 (13): 4389–4399. doi:10.1158/1078-0432.CCR-10-2772. PMID 21521775. 
  23. "Meeting Library Redesign". 2017-05-26. http://www.asco.org/ASCO/Abstracts+&+Virtual+Meeting/Abstracts?vmview=abst_detail_view&confID=26&abstractID=4297. 
  24. Leleu, X.; Jia, X.; Runnels, J.; Ngo, H.; Moreau, A.; Farag, M.; Spencer, J.; Pitsillides, C. et al. (2007). "The Akt pathway regulates survival and homing in Waldenstrom macroglobulinemia". Blood 110 (13): 4417–4426. doi:10.1182/blood-2007-05-092098. PMID 17761832. 
  25. Mensah-Osman, E.; Al-Katib, A.; Dandashi, M.; Mohammad, R. (2003). "XK469, a topo IIbeta inhibitor, induces apoptosis in Waldenstrom's macroglobulinemia through multiple pathways". International Journal of Oncology 23 (6): 1637–1644. doi:10.3892/ijo.23.6.1637. PMID 14612935. 
  26. 26.0 26.1 Leleu, X.; Eeckhoute, J.; Jia, X.; Roccaro, A.; Moreau, A.; Farag, M.; Sacco, A.; Ngo, H. et al. (2008). "Targeting NF-kappaB in Waldenstrom macroglobulinemia". Blood 111 (10): 5068–5077. doi:10.1182/blood-2007-09-115170. PMID 18334673. 
  27. Braggio, E.; Keats, J.; Leleu, X.; Van Wier, S.; Jimenez-Zepeda, V.; Valdez, R.; Schop, R.; Price-Troska, T. et al. (2009). "Identification of copy number abnormalities and inactivating mutations in two negative regulators of nuclear factor-kappaB signaling pathways in Waldenstrom's macroglobulinemia". Cancer Research 69 (8): 3579–3588. doi:10.1158/0008-5472.CAN-08-3701. PMID 19351844. 
  28. Gutiérrez, N.; Ocio, E.; De Las Rivas, J.; Maiso, P.; Delgado, M.; Fermiñán, E.; Arcos, M.; Sánchez, M. et al. (2007). "Gene expression profiling of B lymphocytes and plasma cells from Waldenström's macroglobulinemia: comparison with expression patterns of the same cell counterparts from chronic lymphocytic leukemia, multiple myeloma and normal individuals". Leukemia 21 (3): 541–549. doi:10.1038/sj.leu.2404520. PMID 17252022. 
  29. Burwick, N.; Roccaro, A.; Leleu, X.; Ghobrial, I. (2008). "Targeted therapies in Waldenström macroglobulinemia". Current Opinion in Investigational Drugs 9 (6): 631–637. PMID 18516762. 
  30. Chng, W.; Schop, R.; Price-Troska, T.; Ghobrial, I.; Kay, N.; Jelinek, D.; Gertz, M.; Dispenzieri, A. et al. (2006). "Gene-expression profiling of Waldenstrom macroglobulinemia reveals a phenotype more similar to chronic lymphocytic leukemia than multiple myeloma". Blood 108 (8): 2755–2763. doi:10.1182/blood-2006-02-005488. PMID 16804116. 
  31. Nichols, G.; Stein, C. (2003). "Modulation of the activity of Bcl-2 in Waldenstrom's macroglobulinemia using antisense oligonucleotides". Seminars in Oncology 30 (2): 297–299. doi:10.1053/sonc.2003.50045. PMID 12720156. 
  32. Ngo, H.; Azab, A.; Farag, M.; Jia, X.; Melhem, M.; Runnels, J.; Roccaro, A.; Azab, F. et al. (2009). "Src tyrosine kinase regulates adhesion and chemotaxis in Waldenstrom macroglobulinemia". Clinical Cancer Research 15 (19): 6035–6041. doi:10.1158/1078-0432.CCR-09-0718. PMID 19755386. 
  33. Vacca, A.; Dammacco, F. (2009). "MicroRNAs to know in Waldenstrom macroglobulinemia". Blood 113 (18): 4133–4134. doi:10.1182/blood-2009-01-199828. PMID 19406998. 
  34. Roccaro, A.; Sacco, A.; Chen, C.; Runnels, J.; Leleu, X.; Azab, F.; Azab, A.; Jia, X. et al. (2009). "MicroRNA expression in the biology, prognosis, and therapy of Waldenström macroglobulinemia". Blood 113 (18): 4391–4402. doi:10.1182/blood-2008-09-178228. PMID 19074725. 
  35. "MiRNA Entry for MI0000764". http://www.mirbase.org/cgi-bin/mirna_entry.pl?acc=MI0000764. 
  36. "MiRNA Entry for MI0000490". http://www.mirbase.org/cgi-bin/mirna_entry.pl?acc=MI0000490. 
  37. "MiRNA Entry for MI0003134". http://www.mirbase.org/cgi-bin/mirna_entry.pl?acc=MI0003134. 
  38. "MiRNA Entry for MI0000681". http://www.mirbase.org/cgi-bin/mirna_entry.pl?acc=MI0000681. 
  39. "MiRNA Entry for MI0000481". http://www.mirbase.org/cgi-bin/mirna_entry.pl?acc=MI0000481. 
  40. "MiRNA Entry for MI0003686". http://www.mirbase.org/cgi-bin/mirna_entry.pl?acc=MI0003686. 
  41. "MiRNA Entry for MI0000466". http://www.mirbase.org/cgi-bin/mirna_entry.pl?acc=MI0000466. 
  42. Roccaro, A.; Sacco, A.; Jia, X.; Azab, A.; Maiso, P.; Ngo, H.; Azab, F.; Runnels, J. et al. (2010). "microRNA-dependent modulation of histone acetylation in Waldenström macroglobulinemia". Blood 116 (9): 1506–1514. doi:10.1182/blood-2010-01-265686. PMID 20519629. 
  43. Treon, S.; Kelliher, A.; Keele, B.; Frankel, S.; Emmanouilides, C.; Kimby, E.; Schlossman, R.; Mitsiades, N. et al. (2003). "Expression of serotherapy target antigens in Waldenstrom's macroglobulinemia: therapeutic applications and considerations". Seminars in Oncology 30 (2): 248–252. doi:10.1053/sonc.2003.50047. PMID 12720146. 
  44. "Waldenstrom macroglobulinemia. Development of diagnostic criteria and identification of prognostic factors". Am J Clin Pathol 116 (3): 420–8. 2001. doi:10.1309/4LCN-JMPG-5U71-UWQB. PMID 11554171. 
  45. "Immunophenotypic analysis of Waldenstrom's macroglobulinemia". Semin Oncol 30 (2): 187–95. 2003. doi:10.1053/sonc.2003.50074. PMID 12720134. 
  46. "Waldenstrom macroglobulinemia". Curr Treat Options Oncol 5 (3): 239–47. 2004. doi:10.1007/s11864-004-0015-5. PMID 15115652. 
  47. "Diagnosis and management of Waldenstrom's macroglobulinemia". J Clin Oncol 23 (7): 1564–77. 2005. doi:10.1200/JCO.2005.03.144. PMID 15735132. 
  48. Morbidity Mediated By The Effects Of IgM From Chapter 88 – Waldenström Macroglobulinemia/Lymphoplasmacytic Lymphoma. Hoffman, Ronald (2009). Hematology : basic principles and practic. Philadelphia, PA: Churchill Livingstone/Elsevier. ISBN 978-0-443-06715-0. 
  49. 49.0 49.1 Waldenstrom Macroglobulinemia~workup at eMedicine
  50. 50.0 50.1 National Cancer Institute. Waldenström Macroglobulinemia: Questions and Answers . Retrieved on: 2011-08-14.
  51. Criteria for diagnosis of WM- IMWG 2009 guidelines
  52. Leleu, X.; Gay, J.; Roccaro, A.; Moreau, A.; Poulain, S.; Dulery, R.; Champs, B.; Robu, D. et al. (2009). "Update on therapeutic options in Waldenström macroglobulinemia". European Journal of Haematology 82 (1): 1–12. doi:10.1111/j.1600-0609.2008.01171.x. PMID 19087134. 
  53. 53.0 53.1 Neparidze, N.; Dhodapkar, M. (2009). "Waldenstrom's macroglobulinemia: Recent advances in biology and therapy". Clinical Advances in Hematology & Oncology 7 (10): 677–681, 687–681. PMID 20040909. 
  54. Yang, G.; Zhou, Y.; Liu, X.; Xu, L.; Cao, Y.; Manning, R. J.; Patterson, C. J.; Buhrlage, S. J. et al. (2013). "A mutation in MYD88 (L265P) supports the survival of lymphoplasmacytic cells by activation of Bruton tyrosine kinase in Waldenstrom macroglobulinemia". Blood 122 (7): 1222–1232. doi:10.1182/blood-2012-12-475111. ISSN 0006-4971. PMID 23836557. 
  55. Treon, Steven P.; Tripsas, Christina K.; Meid, Kirsten; Warren, Diane; Varma, Gaurav; Green, Rebecca; Argyropoulos, Kimon V.; Yang, Guang et al. (2015). "Ibrutinib in Previously Treated Waldenström's Macroglobulinemia". New England Journal of Medicine 372 (15): 1430–1440. doi:10.1056/NEJMoa1501548. ISSN 0028-4793. PMID 25853747. 
  56. Goodin, Tara (29 January 2015). "FDA expands approved use of Imbruvica for rare form of non-Hodgkin lymphoma". FDA. https://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm432123.htm?sf35886412=1. 
  57. Treon, S. P. (2009). "How I treat Waldenström macroglobulinemia". Blood 114 (12): 2375–2385. doi:10.1182/blood-2009-05-174359. PMID 19617573. 
  58. Ansell, S. M.; Kyle, R. A.; Reeder, C. B.; Fonseca, R.; Mikhael, J. R.; Morice, W. G.; Bergsagel, P. L.; Buadi, F. K. et al. (2010). "Diagnosis and Management of Waldenström Macroglobulinemia: Mayo Stratification of Macroglobulinemia and Risk-Adapted Therapy (mSMART) Guidelines". Mayo Clinic Proceedings 85 (9): 824–833. doi:10.4065/mcp.2010.0304. PMID 20702770. 
  59. Varettoni, M.; Tedeschi, A.; Arcaini, L.; Pascutto, C.; Vismara, E.; Orlandi, E.; Ricci, F.; Corso, A. et al. (2011). "Risk of second cancers in Waldenstrom macroglobulinemia". Annals of Oncology 23 (2): 411–415. doi:10.1093/annonc/mdr119. PMID 21525403. 
  60. Waldenstrom Macroglobulinemia~treatment at eMedicine
  61. Waldenström J (1991). "To treat or not to treat, this is the real question". Leuk Res 15 (6): 407–8. doi:10.1016/0145-2126(91)90049-Y. PMID 1907339. 
  62. Baehring, J.; Hochberg, E.; Raje, N.; Ulrickson, M.; Hochberg, F. (2008). "Neurological manifestations of Waldenström macroglobulinemia". Nature Clinical Practice Neurology 4 (10): 547–556. doi:10.1038/ncpneuro0917. PMID 18813229. 
  63. "Prognostic markers and criteria to initiate therapy in Waldenstrom's macroglobulinemia: consensus panel recommendations from the Second International Workshop on Waldenstrom's Macroglobulinemia". Semin Oncol 30 (2): 116–20. 2003. doi:10.1053/sonc.2003.50038. PMID 12720119. 
  64. Treon, S.; Soumerai, J.; Branagan, A.; Hunter, Z.; Patterson, C.; Ioakimidis, L.; Briccetti, F.; Pasmantier, M. et al. (2008). "Thalidomide and rituximab in Waldenstrom macroglobulinemia". Blood 112 (12): 4452–4457. doi:10.1182/blood-2008-04-150854. PMID 18713945. 
  65. Gertz MA (2005). "Waldenstrom macroglobulinemia: a review of therapy". Am J Hematol 79 (2): 147–57. doi:10.1002/ajh.20363. PMID 15929102. 
  66. Dimopoulos, Meletios A.; Tedeschi, Alessandra; Trotman, Judith; García-Sanz, Ramón; Macdonald, David; Leblond, Veronique; Mahe, Beatrice; Herbaux, Charles et al. (21 June 2018). "Phase 3 Trial of Ibrutinib plus Rituximab in Waldenström's Macroglobulinemia". New England Journal of Medicine 378 (25): 2399–2410. doi:10.1056/NEJMoa1802917. PMID 29856685. 
  67. "Autologous peripheral blood stem cell transplantation for Waldenstrom's macroglobulinemia". Bone Marrow Transplant 24 (8): 929–30. 1999. doi:10.1038/sj.bmt.1701992. PMID 10516708. 
  68. "Allogeneic bone marrow transplantation for advanced Waldenstrom's macroglobulinemia". Bone Marrow Transplant 23 (7): 747–9. 1999. doi:10.1038/sj.bmt.1701633. PMID 10218857. 
  69. "High-dose chemotherapy followed by stem cell transplantation in patients with resistant Waldenstrom's macroglobulinemia". Bone Marrow Transplant 27 (10): 1027–9. 2001. doi:10.1038/sj.bmt.1703041. PMID 11438816. 
  70. "Transplantation in Waldenstrom's macroglobulinemia--the French experience". Semin Oncol 30 (2): 291–6. 2003. doi:10.1053/sonc.2003.50048. PMID 12720155. 
  71. "FDA approves zanubrutinib for Waldenström's macroglobulinemia". 1 September 2021. https://www.fda.gov/drugs/resources-information-approved-drugs/fda-approves-zanubrutinib-waldenstroms-macroglobulinemia.  This article incorporates text from this source, which is in the public domain.
  72. Kyriakou, C.; Canals, C.; Cornelissen, J. J.; Socie, G.; Willemze, R.; Ifrah, N.; Greinix, H. T.; Blaise, D. et al. (2010). "Allogeneic Stem-Cell Transplantation in Patients with Waldenstrom Macroglobulinemia: Report from the Lymphoma Working Party of the European Group for Blood and Marrow Transplantation". Journal of Clinical Oncology 28 (33): 4926–4934. doi:10.1200/JCO.2009.27.3607. PMID 20956626. 
  73. Rourke, M.; Anderson, K. C.; Ghobrial, I. M. (2010). "Review of clinical trials conducted in Waldenstrom macroglobulinemia and recommendations for reporting clinical trial responses in these patients". Leukemia & Lymphoma 51 (10): 1779–1792. doi:10.3109/10428194.2010.499977. PMID 20795787. 
  74. "Search of: Waldenstrom - List Results - ClinicalTrials.gov". https://www.clinicaltrials.gov/ct2/results?term=Waldenstrom. 
  75. Treon, S. P.; Yang, G.; Hanzis, C.; Ioakimidis, L.; Verselis, S. J.; Fox, E. A.; Xu, L.; Hunter, Z. R. et al. (2011). "Attainment of complete/very good partial response following rituximab-based therapy is an important determinant to progression-free survival, and is impacted by polymorphisms in FCGR3A in Waldenstrom macroglobulinaemia". British Journal of Haematology 154 (2): 223–228. doi:10.1111/j.1365-2141.2011.08726.x. PMID 21564078. 
  76. Waldenstrom Macroglobulinemia at eMedicine
  77. "Waldenstrom's macroglobulinemia with the AML/MDS-associated t(1;3)(p36;q21)". Leukemia 9 (7): 1136–8. 1995. PMID 7630185. 
  78. Morel P, Duhamel A, Gobbi P, Dimopoulos M, Dhodapkar M, McCoy J, et al. International Prognostic Scoring System for Waldenström's Macroglobulinemia. XIth International Myeloma Workshop & IVth International Workshop on Waldenstrom's Macroglobulinemia 25 30 June 2007 Kos Island, Greece. Haematologica 2007;92(6 suppl 2):1–229.
  79. Kastritis, E.; Kyrtsonis, M.; Hadjiharissi, E.; Symeonidis, A.; Michalis, E.; Repoussis, P.; Tsatalas, C.; Michael, M. et al. (2010). "Validation of the International Prognostic Scoring System (IPSS) for Waldenstrom's macroglobulinemia (WM) and the importance of serum lactate dehydrogenase (LDH)". Leukemia Research 34 (10): 1340–1343. doi:10.1016/j.leukres.2010.04.005. PMID 20447689. 
  80. N.B. The article refers to them as "adverse covariates".
  81. 81.0 81.1 Dimopoulos, M.; Kastritis, E.; Delimpassi, S.; Zomas, A.; Kyrtsonis, M.; Zervas, K. (2008). "The International Prognostic Scoring System for Waldenstrom's macroglobulinemia is applicable in patients treated with rituximab-based regimens". Haematologica 93 (9): 1420–1422. doi:10.3324/haematol.12846. PMID 18641029. 
  82. "Survival Rates for Waldenstrom Macroglobulinemia". http://www.cancer.org/cancer/waldenstrommacroglobulinemia/detailedguide/waldenstrom-macroglobulinemia-survival-rates. 
  83. Hivert, B.; Tamburini, J.; Vekhoff, A.; Tournilhac, O.; Leblond, V.; Morel, P. (2011-03-10). "Prognostic value of the International Scoring System and response in patients with advanced Waldenström macroglobulinemia". Haematologica 96 (5): 785–788. doi:10.3324/haematol.2010.029140. PMID 21393333. 
  84. Dhodapkar, M.; Hoering, A.; Gertz, M.; Rivkin, S.; Szymonifka, J.; Crowley, J.; Barlogie, B. (2009). "Long-term survival in Waldenstrom macroglobulinemia: 10-year follow-up of Southwest Oncology Group-directed intergroup trial S9003". Blood 113 (4): 793–796. doi:10.1182/blood-2008-07-172080. PMID 18931340. 
  85. Turgeon, Mary Louise (2005). Clinical hematology: theory and procedures. Hagerstown, MD: Lippincott Williams & Wilkins. p. 283. ISBN 978-0-7817-5007-3. https://archive.org/details/clinicalhematolo0004turg. "Frequency of lymphoid neoplasms. (Source: Modified from WHO Blue Book on Tumour of Hematopoietic and Lymphoid Tissues. 2001, p. 2001.)" 
  86. Waldenstrom J (1944). "Incipient myelomatosis or "essential" hyperglobulinemia with fibrinognenopenia-a new syndrome?". Acta Med Scand 117 (3–4): 216–247. doi:10.1111/j.0954-6820.1944.tb03955.x. 
  87. "The World Health Organization classification of neoplastic diseases of the haematopoietic and lymphoid tissues: Report of the Clinical Advisory Committee Meeting, Airlie House, Virginia, November 1997". Histopathology 36 (1): 69–86. 2000. doi:10.1046/j.1365-2559.2000.00895.x. PMID 10632755. 
Classification
External resources