Rare: The true etiology of sarcoidosis remains unknown. Our knowledge of the disease keeps growing and there are many theories as to the cause. They may be a slightly higher risk in first degree relatives who have sarcoid but it remains small and we still have not isolated the specific gene sarcoid is found on.
Answered 3/30/2012
5.9k views
Variable: It can run in families and sarcoidosis can be more common in certain ethnic groups, particularly african-americans. If you are not sure, go see a physician promptly.
Answered 1/30/2014
5.9k views
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