[Familial sarcoidosis: 3 cases in the same family].

Familial sarcoidosis is uncommon, representing less than 5% of the cases. We reported three cases of sarcoidosis in the same family (two sisters and a brother) with different clinical presentation in spite of the presence in each patient of HLA B8 DR3. These HLA phenotype may be related with favourable sarcoidosis. Until the two sisters had articular and benign lymph nodes diseases, the brother had multivisceral sarcoidosis involving the liver, the lung and the mediastinum. Corticosteroid were used during 6 month with favourable evolution. There is 16 years between the three sarcoidosis history but the disease appeared till the third decade. The two sisters and the brother did not live in the same city. These suggest than genetic predisposition is more effective than environmental basis.