immunodeficiency

Complement deficiency

Complement is an of absent or suboptimal functioning of one of the complement system proteins. Because of redundancies in the system, many complement disorders are never diagnosed. Some studies estimate that less than 10% are identified. Hypocomplementemia may be used more generally to refer to decreased complement levels, while secondary complement disorder means decreased complement levels that are not directly due to a cause but secondary to another medical condition.

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Symptoms — what it feels like

·Recurring , rheumatic disease

Causes — why it happens

·Can be inherited or acquired

How it's found

·CH50 measurement, level

Treatment

·Immunosuppressive therapy

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Plain-language summary adapted from Wikipedia. Not medical advice.