Fig. 6.

Immunohistochemical analysis of interferon (IL)-17 in lung tissue. (a) Sample from granuloma of a sarcoidosis patient with Löfgren's syndrome. (b) Granuloma of a sarcoidosis patient without Löfgren's syndrome. (c) Respiratory bronchiole from healthy control and (d), non-granulomatous alveolar section from a sarcoidosis patient with Löfgren's syndrome. (e–h) Contiguous corresponding slides were stained with rabbit immunoglobulin (Ig)G as a negative control, respectively. IL-17-producing cells are indicated by arrows. Magnification: ×400.