Sarcoidosis: diagnosis and management.

Predominantly a disease of young adults, sarcoidosis may present in a variety of guises, masquerading as acute rheumatoid arthritis, lymphadenopathy, cor pulmonale, erythema nodosum, Crohn's disease, etc. Although the characteristic granulomatous lesions of sarcoidosis can affect almost any organ system, they will appear on chest films in at least 90% of patients.