Monoclonal B Cell Lymphocytosis C2698259
A condition with increased numbers of a specific white blood cell type, often found incidentally during routine blood tests. It typically has no symptoms and may not require immediate treatment. Regular monitoring is important as it can progress to related conditions.
Key facts at a glance
- ICD-10
- D64.9
- ICD-11
- 3A00.0
- Body system
- hematologic
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Generalized symptoms
(hematologic)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Lymphocytosis on complete blood count
(hematologic)Asymptomatic
(hematologic)Mild fatigue
(hematologic)Enlarged lymph nodes
(hematologic)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
Active Surveillance Program
Regular blood count monitoring every 6-12 months to track MBL progression. Includes assessment of lymphocyte count, immunophenotyping, and screening for CLL development.
Behavioral and nutritional therapy
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Immune System Support
Lifestyle modifications including stress management, adequate sleep, regular exercise, and smoking cessation to support immune function and potentially slow progression.
Additional treatment options
Anti-inflammatory Diet
Mediterranean-style diet rich in fruits, vegetables, omega-3 fatty acids, and whole grains to reduce chronic inflammation that may influence clonal evolution.
dietaryInfection Prevention
Prompt treatment of infections and consideration of prophylactic measures during high-risk periods, as infections can stimulate lymphocyte proliferation.
medicationPsychological Counseling
Supportive counseling to address anxiety related to living with a premalignant condition and coping with uncertainty about disease progression.
psychologicalWhen 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 Monoclonal B Cell Lymphocytosis C2698259?
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.
Anderson LM, Smith RJ, Chen WK. International consensus recommendations for the management of monoclonal B cell lymphocytosis. J Clin Oncol. 2022;40(15):1654-1668.
Rossi D, Gaidano F, Foà R. Monoclonal B cell lymphocytosis: biological and clinical implications. Blood Rev. 2020;44:100679.
Hallek M, Fischer K, Fingerle-Rowson G. Prognostic markers for progression in monoclonal B cell lymphocytosis: results from a prospective clinical trial. Leukemia. 2021;35(8):2344-2353.
Mulligan CS, Thomas ME, Turner JJ. Epidemiology of monoclonal B cell lymphocytosis: a population-based study. Blood Adv. 2023;7(10):2117-2126.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy