title: Unusual clinical presentation of acute sarcoidosis.
abstract: A 16-year-old male developed fever and productive cough of 2 months' duration. Extensive search for an infectious process was negative. After appearance of knee joint effusion, a transbronchial biopsy through a fiberoptic bronchoscope revealed histological findings consistent with sarcoidosis. The patient recovered after a course of prednisone therapy. The atypical presentation of this systemic disease caused considerable delay in diagnosis and initiation of treatment.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D001168:Arthritis / Q000175:diagnosis; D003371:Cough / Q000175:diagnosis; D003937:Diagnosis, Differential; D005334:Fever / Q000175:diagnosis; D006801:Humans; D008297:Male; D012507:Sarcoidosis / Q000175:diagnosis*