Abstract
The diagnosis of sarcoidosis is based on the finding of an epithelioid granuloma at histological examination. A retrospective study of 618 biopsies obtained from 416 patients with sarcoid disease showed an average sensitivity of 69 p. 100. The sensitivity of guided biopsies, especially skin and lymph node biopsies, was almost 90 p. 100, whereas that of blind biopsies tended to increase with the degree of hazard involved, ranging from 49 p. 100 in proximal bronchial biopsy to 70 p. 100 in liver needle biopsy. When treatment is not urgently required, the Kveim test is safe, cheap and fairly sensitive (65 p. 100 positive results).
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