Sarcoidosis is a rare disease that results from inflammation.
Ninety percent of the cases of sarcoidosis are found in the lungs, but it can occur in almost any organ. It causes small lumps, or granulomas, which generally heal and disappear on their own. However, for those granulomas that do not heal, the tissue can remain inflamed and become scarred, or fibrotic. Pulmonary sarcoidosis can develop into pulmonary fibrosis , which distorts the structure of the lungs and can interfere with breathing. Bronchiectasis , a lung disease in which pockets form in the air tubes of the lung and become sites for infection, can also occur .