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Combined immunodeficiency with skin granulomas is characterized by recurrent viral infections and the presence of granulomas in the skin, mucous membranes and/or internal organs. There is a gradual reduction in the number and function of B cells (a type of white blood cell that makes antibodies), and T lymphocytes (a type of white blood cell, that protect the body from infection attacking the infected cells directly), hypogammaglobulinemia (reduction in all types of gamma globulins, including antibodies that help fight infection.) and defective autoinmunity where the immune system attacks the body itself. Some people may develop associated auto-immune diseases such as myasthenia gravis, vitiligo, low blood red and white cells, psoriasis, and Guillain–Barré syndrome.
It is caused by mutations in the RAG1 and/or RAG2 genes. These genes provide instructions for making a member of a group of proteins called the RAG complex, which is involved in the process, known as V(D)J recombination, needed for maintaining the diversity of the B and T cells so they can be able to recognize diverse foreign agents allowing the body to fight infections. The mutations can impair RAG complex formation and function, resulting in an impaired B and T cells' function. Depending on the residual activity of the RAG proteins the disease can be more or less severe. In less severe cases symptoms are milder and may appear later in life. Treatment is with bone marrow transplantation.
Source: GARD Last updated on 05-01-20
An unknown % of people have these symptoms.
Click on a symptom to see definitions for associated terms.
|Recurrent respiratory infections|
|Broad long bone diaphyses|
|Autosomal recessive inheritance|
|Decrease in T cell count|
|Decreased circulating IgG level|
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