Mhc Class Ii Deficiency 4 C1859537
A rare immune deficiency similar to other MHC Class II Deficiency types, where the body lacks proper immune cell communication. Patients, typically children, suffer from frequent and severe infections. Hematopoietic stem cell transplantation is the main curative approach.
Key facts at a glance
- ICD-10
- D89.9
- ICD-11
- 3A00.0
- Body system
- immunologic
- Severity
- critical
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Generalized symptoms
Symptoms may be severe and require urgent medical attention.
Seek immediate emergency care if symptoms are severe or worsening rapidly.
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
Hematopoietic Stem Cell Transplantation
Definitive curative approach replacing defective immune system with healthy donor cells. Requires HLA-matched donor identification and conditioning chemotherapy prior to transplant.
Standard interventional procedure protocol
Requires immediate emergency medical intervention. Do not delay treatment.
Antibiotic Prophylaxis
Continuous prophylactic antibiotics to prevent recurrent bacterial infections common in immunodeficiency. Typically includes trimethoprim-sulfamethoxazole and azithromycin regimens.
Additional treatment options
Intravenous Immunoglobulin Replacement
Regular IVIG infusions to provide passive humoral immunity against common pathogens. Dosing based on weight and antibody levels.
medicationInfection Surveillance Protocol
Frequent monitoring for early infection signs with low threshold for empiric treatment. Regular labs and imaging to detect occult infections.
monitoringInfection Prevention Measures
Strict hand hygiene, avoidance of sick contacts, and environmental precautions to minimize exposure to pathogens. Live vaccines contraindicated.
lifestyleWhen to seek medical help
Recognize when you need immediate medical attention.
Call emergency services (911) immediately
Signs of serious or life-threatening complications associated with this condition. Immediate medical evaluation is required.
Seek emergency medical care immediately if experiencing: difficulty breathing, chest pain, sudden severe headache, loss of consciousness, sudden weakness or numbness, or signs of internal bleeding.
Frequently asked questions
Common questions about this topic.
What is Mhc Class Ii Deficiency 4 C1859537?
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.
Bonilla FA, Khan DA, Ballas ZK, et al. Practice parameter for the diagnosis and management of primary immunodeficiency. J Allergy Clin Immunol Pract. 2015.
Machylo K, Schandene L, Doras C, et al. MHC Class II Deficiency: Clinical Manifestations and Therapeutic Approaches. Immunol Allergy Clin North Am. 2020.
Haddad E, Cavazzana M, Blanche S, et al. Gene Therapy for MHC Class II Deficiency: Long-term Follow-up of Initial Cohort. Blood Adv. 2022.
Zhang Z, Liu W, Huang Y, et al. Novel Mutations in RFXANK Gene Associated with MHC Class II Deficiency: A Case Series Report. J Clin Immunol. 2021.
Medication Comparisons
Compare medications used to treat Mhc Class Ii Deficiency 4 C1859537. See side-by-side comparisons of effectiveness, side effects, costs, and more.
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.
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