A Kveim test is a test for sarcoidosis.

The test consist of injecting part of a spleen from a person who is known to have sarcoidosis into the skin of a patient who is suspected to have the disease. If the patient does have sarcoidosis, granulomas will form at the injection site in 4 to 6 weeks.

If the patient is on steroids, granulomas may not form and this may result in a false negative.

Because of the risk of infection, the test is now rarely performed.

Kveim test at Wikipedia

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