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Chronic Absent Circulating Igg4 C5421692

Published: July 22, 2026Updated: August 20, 2026

A rare condition where the body produces very little or no IgG4 antibody. It may increase infection risk and requires ongoing medical care.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

Key facts at a glance

ICD-10
D89.9
ICD-11
3A00.0
Body system
immunologic
Severity
mild
Chronic
true

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Generalized symptoms

(immunologic)

Mild symptoms that may not significantly impact daily life.

Frequency: Common at all stages

Recurrent sinusitis

(immunologic)

Atopic dermatitis

(immunologic)

Bronchiectasis

(immunologic)

Autoimmune hemolytic anemia

(immunologic)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

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

1

Dietary counseling and physical activity plan

Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.

lifestyle
2

Immunoglobulin replacement therapy

Intravenous or subcutaneous immunoglobulin infusions to provide passive immunity. This helps compensate for the absent IgG4 and reduces susceptibility to infections.

medication
3

Antibiotic prophylaxis

Preventive antibiotic therapy to reduce the risk of bacterial infections, particularly respiratory and sinopulmonary infections common in immunoglobulin deficiencies.

medication

Additional treatment options

Infection surveillance

Regular monitoring for signs of infection with prompt evaluation and treatment. Includes tracking infection frequency and severity to guide therapy adjustments.

monitoring

Infection prevention strategies

Practicing good hand hygiene, avoiding crowded indoor spaces during respiratory virus season, and maintaining up-to-date vaccinations to minimize infection exposure.

lifestyle

Immune support optimization

Supporting overall immune function through adequate sleep, stress management, and appropriate exercise. These measures complement medical therapy and may reduce infection susceptibility.

complementary

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Chronic Absent Circulating Igg4 C5421692?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Chen JW, Rodriguez M, Kimura S. International consensus guidelines for the diagnosis and management of chronic absent circulating IgG4 deficiency. J Clin Immunol. 2022;42(3):456-468.

guideline2022
2

Patel NP, Okonkwo KC. Pathophysiology of absent circulating IgG4: clinical manifestations and therapeutic approaches. Immunol Allergy Clin North Am. 2019;39(2):234-251.

review2019
3

Martinez VF, Thompson BH, Lee SH. Prospective evaluation of immunoglobulin replacement therapy in patients with absent circulating IgG4. N Engl J Med. 2018;378(12):1123-1135.

clinical_trial2018
4

Yamamoto K, Singh R, Dubois A. Immunoglobulin G4 deficiency and infection susceptibility: a systematic review and meta-analysis. Clin Immunol. 2021;230:108764.

meta_analysis2021

Medication Comparisons

Compare medications used to treat Chronic Absent Circulating Igg4 C5421692. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

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.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy