What is C3G?

C3 refers to a key protein in the complement system, which is part of your immune system. Glomerulopathy means that something is not working properly in the glomeruli, which are small units in the kidneys that filter blood.

C3 glomerulopathy (glo-MER-u-LOP-ah-thee) or C3G is a rare, chronic disease in which experts believe that a specific part of the immune system, the alternative pathway of the complement system, is not well controlled, often resulting in damage to the kidneys.

Check out the resources below to learn more and find support.

C3 refers to a key protein in the complement system, which is part of your immune system. Glomerulopathy means that something is not working properly in the glomeruli, which are small units in the kidneys that filter blood.

C3 glomerulopathy (glo-MER-u-LOP-ahthee) or C3G is a rare, chronic disease in which experts believe that a specific part of the immune system, the alternative pathway of the complement system, is not well controlled, often resulting in damage to the kidneys.

Check out the resources below to learn more and find support.

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Resources to support you on your journey

Use these resources to help you find important information for managing your C3G disease.

Understanding C3G


C3G is a rare chronic kidney disease. Find out more about what it is, how it can affect your body, and what to do about it.

Understanding C3G


C3G is a rare chronic kidney disease. Find out more about what it is, how it can affect your body, and what to do about it.

Support for people with C3G


Support for people with C3G