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A comparison of the value of mediastinal lymph node biopsy and the Kveim test in sarcoidosis.

The results of mediastinoscopy and of a Kveim test carried out at the same time in a series of 82 patients with probable sarcoidosis are presented. Histologic confirmation of sarcoidosis was obtained by one or other procedure in 76 of the 82 patients investigated. Mediastinoscopy showed an advantage over the Kveim test among patients in all radiographic groups. The mediastinal lymph node and Kveim test histologic features were compared.