Roentgenographic type and CT findings in pulmonary sarcoidosis

: There are five roentgenographic type of intratracic changes, Type 0 means no visible intratracic findings. Type I is bilateral hilar lymphadenopathy, Type II is bilateral hilar adenopathy accompanied by parenchymal infiltration. Type III is only parenchymal infiltration and type IV is advanced fibrosis. CT findings are peribroncho-vascular markings, diffuse small nodules, and large irregular nodules. Usually diffuse small nodules had tendency to improve, although peribronchial markings, atelectacis, pleural thickening, and bullae are irreversible and progressive. CT plays an important role in the diagnosis and prognostic value in pulmonary sarcoidosis.