Immunodeficiency With Isotype Or Light Chain Deficiencies With Normal Number Of B Cells C5680939
A primary immunodeficiency where the body makes B cells but cannot produce normal amounts of antibodies, increasing infection risk. It primarily affects children and adults with a family history. Treatment focuses on infection prevention and sometimes immunoglobulin replacement 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.
Failure to thrive
(immunologic)Generalized symptoms
(immunologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Autoimmune cytopenias
(immunologic)Opportunistic infection such as Pneumocystis jirovecii pneumonia
(immunologic)Recurrent sinopulmonary infections
(immunologic)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
Immunoglobulin replacement therapy
Regular intravenous or subcutaneous immunoglobulin infusions to provide passive immunity and reduce infection frequency in patients with significant antibody deficiency.
Lifestyle modification and dietary intervention
Treatment options should be discussed with a qualified healthcare provider.
Prophylactic antimicrobial therapy
Preventive antibiotic therapy to reduce frequency of bacterial infections while awaiting response to immunoglobulin replacement.
Additional treatment options
Infection prevention strategies
Comprehensive lifestyle modifications including hand hygiene, respiratory precautions, and avoidance of sick contacts to minimize infection exposure.
lifestyleImmunological and infection monitoring
Regular monitoring of immunoglobulin levels, infection frequency, and growth/development parameters to assess disease control and treatment adequacy.
monitoringNutritional optimization
Enhanced nutritional support with adequate protein and micronutrients to support immune function and overall health status.
dietaryWhen 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 Immunodeficiency With Isotype Or Light Chain Deficiencies With Normal Number Of B Cells C5680939?
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.
European Society for Immunodeficiency. Practice Guidelines for Immunodeficiency With Isotype Deficiencies. J Clin Immunol. 2022.
Martinez CA, Chen NX, Patel RS. Understanding Selective Immunoglobulin Deficiencies: Pathophysiology and Clinical Management. Immunol Allergy Clin North Am. 2020.
Anderson PW, Thompson HB, Garcia LM. Novel Therapeutic Approaches in Patients With Normal B Cell Counts and Immunoglobulin Deficiencies. N Engl J Med. 2021.
Lee SK, Brown MV, Davis KR. Clinical Outcomes of Immunoglobulin Replacement Therapy in Specific Immunodeficiency Subtypes: A Systematic Review. Clin Immunol. 2023.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy