D84.0 Lymphocyte function antigen-1 [LFA-1] defect

Name of the Condition

Lymphocyte function antigen-1 [LFA-1] defect (ICD-10 Code: D84.0)

Summary

Lymphocyte function antigen-1 (LFA-1) defect is a rare immunodeficiency disorder characterized by impaired function of the LFA-1 protein, which plays a critical role in immune cell adhesion and signaling. This defect can lead to increased susceptibility to infections and abnormal immune responses.

Causes

Primarily caused by genetic mutations affecting the ITGB2 gene, which encodes the LFA-1 protein. These mutations disrupt the protein's structure or function, impairing immune cell interactions.

Risk Factors

• Family history of immunodeficiency disorders.
• Inherited genetic mutations in the ITGB2 gene.

Symptoms

• Increased frequency of bacterial infections, particularly with encapsulated organisms.
• Delayed wound healing.
• Recurrent or severe infections affecting the skin, respiratory tract, or other sites.
• Possible autoimmune manifestations in some cases.

Diagnosis

Diagnosis involves clinical evaluation of infection patterns, flow cytometry to assess LFA-1 expression on immune cells, and genetic testing to identify ITGB2 mutations. Functional assays may evaluate immune cell adhesion and signaling.

Treatment Options

• Prophylactic antibiotics to prevent infections.
• Immunizations to reduce infection risk.
• Supportive care for managing infections and complications.
• In severe cases, hematopoietic stem cell transplantation may be considered.

Prognosis and Follow-Up

Prognosis varies depending on the severity of the defect and the effectiveness of infection prevention strategies. Regular monitoring for infections and immune function is essential. Early intervention can improve outcomes.

Complications

• Recurrent or life-threatening infections.
• Chronic inflammation or autoimmune conditions.
• Delayed growth or development in severe cases.

Lifestyle & Prevention

• Practice good hygiene to reduce infection risk.
• Avoid exposure to known infectious agents.
• Follow recommended vaccination schedules.
• Promptly treat any signs of infection.

When to Seek Professional Help

Seek medical attention if experiencing frequent or severe infections, unexplained fever, or slow recovery from illnesses. Early evaluation is important for managing complications.

Tips for Medical Coders

Document the specific genetic mutation (if known) and clinical manifestations to support coding accuracy. Ensure documentation reflects the underlying immunodeficiency and associated infections or complications.