A comparison of Blau's syndrome and sarcoidosis.

Blau's syndrome is a familial multisystem granulomatous inflammation which may be confused with childhood sarcoidosis because it presents with iridocyclitis, posterior uveitis, granulomatous skin disease, arthritis and elevated serum angiotensin-converting enzyme. They are distinguished by the absence of pulmonary involvement and a negative Kveim-Siltzbach skin test.