In our previous study we showed an increased expression of both TREM-1 and TREM-2 receptors on the surface of myeloid cells in bronchoalveolar lavage fluid (BALF) in pulmonary sarcoidosis (PS) and increased levels of soluble sTREM-1 in BALF of PS patients [18, 19]. This evidence concerns the gene TREM1 and pulmonary sarcoidosis.