[Hidden cystic fibrosis in patient suffering from sarcoidosis].

We describe a case of an adult patient, whom sarcoidosis was diagnosed at first and cystic fibrosis was also discovered 2 years later on. Cystic fibrosis and sarcoidosis are uncommon diseases that only rarely occur together. On the other hand, the coincidence of sarcoidosis and cystic fibrosis is possible, and, moreover, one of the diseases can remain undiagnosed long time. Relationship between sarcoidosis and cystic fibrosis seems not to be probable, in accordance with recent medical reports, and the coincidence of both conditions appears as sporadic.