Transbronchial lung biopsy through fibreoptic bronchoscope in diagnosis of sarcoidosis.

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Abstract
Sarcoidosis was ultimately diagnosed in a consecutive series of 79 patients, of whom 24 presented with unusual features. Histological support for this diagnosis was obtained in 37 out of 42 patients who underwent transbronchial biopsy; epithelioid and giant-cell granulomas were also found on biopsy of the bronchial mucosa in 17 out of 22 patients. Kveim tests were completed in 44 patients: results were positive in 19, equivocal in 11, and negative in 14. In 16 patients histological support was obtained on biopsy of various other tissues. The clinical presentation of the disease and the degree of histological support provided by the various procedures used in reaching a diagnosis of sarcoidosis varied considerably. Transbronchial biopsy of the lung is a useful advance in diagnosing sarcoidosis and provided a higher diagnostic yield than any other method.