Abnormal B Cell Proliferation C4531167
Uncontrolled or excessive growth of B cells, which are white blood cells in the immune system. Can affect both children and adults. Treatment depends on the specific cause and may include monitoring or therapy.
Key facts at a glance
- ICD-10
- D89.9
- ICD-11
- 3A00.0
- Body system
- immunologic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Recurrent Infections
Frequent or unusual infections due to impaired immune function from abnormal B-cell proliferation affecting normal immune cell function.
Seek immediate care if you develop fever above 101°F (38.3°C), severe infections, or infections that do not respond to usual treatment.
Fever
Persistent or recurrent fever without obvious infection, caused by the disease process itself or associated immune dysfunction.
Seek immediate medical attention for fever above 101°F (38.3°C) lasting more than 24 hours, especially if accompanied by chills, confusion, or other concerning symptoms.
Fatigue
(constitutional)Persistent tiredness and weakness that does not improve with rest, often due to anemia or metabolic changes from abnormal B-cell proliferation.
Frequency: 70-80% of patients
Lymphadenopathy
(constitutional)Enlarged lymph nodes, typically painless, often felt in the neck, armpits, or groin areas due to abnormal B-cell accumulation.
Frequency: 60-70% of patients
Night Sweats
(constitutional)Excessive sweating during sleep that may soak through clothing or bedding, often associated with constitutional symptoms of the underlying condition.
Frequency: 30-50% of patients
Unexplained Weight Loss
(constitutional)Significant weight loss (more than 5% of body weight) without changes in diet or exercise, often due to metabolic effects of the disease.
Frequency: 30-40% of patients
Easy Bruising
(hematologic)Bruising or petechiae (small red-purple spots) appearing easily due to low platelet count from bone marrow involvement.
Frequency: 20-30% of patients
Splenomegaly
(hematologic)Enlarged spleen causing fullness in the upper left abdomen, early satiety, or discomfort due to accumulation of abnormal B-cells.
Frequency: 25-35% of patients
Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Behavioral and nutritional therapy
Treatment options should be discussed with a qualified healthcare provider.
Immunomodulatory therapy
Targeted biological agents that regulate B-cell proliferation and function. Treatment requires careful monitoring of hematological parameters and immune function to assess therapeutic response.
Serial hematological surveillance
Regular blood work including flow cytometry to track B-cell populations and proliferation markers. Enables early detection of disease progression or treatment response.
Additional treatment options
Therapeutic apheresis
Procedures such as plasmapheresis may be used to remove pathogenic antibodies or abnormal cells from circulation in severe cases.
procedureInfection prevention protocols
Enhanced hygiene practices, vaccination when appropriate, and avoidance of known infection exposures given potential immunocompromised state.
lifestyleStress reduction and psychological support
Mind-body techniques including meditation and counseling to support immune function and cope with chronic disease management.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormal B Cell Proliferation C4531167?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues, 4th Edition. International Agency for Research on Cancer. Lyon, 2017.
National Comprehensive Cancer Network. NCCN Clinical Practice Guidelines in Oncology: B-Cell Lymphomas. Version 4.2024.
National Comprehensive Cancer Network. NCCN Clinical Practice Guidelines in Oncology: Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma. Version 3.2024.
Swerdlow SH, Campo E, Pileri SA, et al. The 2016 revision of the WHO classification of lymphoid neoplasms. Blood. 2016;127(20):2375-2390.
Cheson BD, Fisher RI, Barrington SF, et al. Recommendations for initial evaluation, staging, and response assessment of Hodgkin and non-Hodgkin lymphoma: the Lugano classification. J Clin Oncol. 2014;32(27):3059-3068.
Kuppers R. Mechanisms of B-cell lymphoma pathogenesis. Nat Rev Cancer. 2005;5(4):251-262.
Hallek M, Cheson BD, Catovsky D, et al. iwCLL guidelines for diagnosis, indications for treatment, response assessment, and supportive management of CLL. Blood. 2018;131(25):2745-2760.
Fischer K, Bahlo J, Fink AM, et al. Long-term remissions after FCR chemoimmunotherapy in previously untreated patients with CLL: updated results of the CLL8 trial. Blood. 2016;127(2):208-215.
Shustik J, Bence A, Bhella S, et al. Policy statement on B-cell lymphoproliferative disorders. Canadian Society of Hematology. 2020.
Hoffbrand AV, Higgs DR, Keeling DM, Mehta AB. Postgraduate Haematology, 7th Edition. Wiley-Blackwell; 2016.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy