Incidence of sarcoidosis in Korea has been believed to be very low, but recently there are sharp increase in number of case reports of the sarcoidosis in Korea. And recent advance in CT made the differentiation of some kindof mediastinal lymph node disease possible on the base of lymph node enhancement pattern. Authors experienced acase of sarcoidosis involving the mediastinum, the lung anad the eye with typical radiologic, pathologic & clinical features, but which showed an unexpected lymph node enhancement pattern on CT scan mimicking tuberculous lymphadenitis and characteristic histopathologic features of healing sarcoid granuloma during the steroid treatment. so authors present the case with literature review and radiologic pathologic correlation with emphasison the differentiation from tuberculous lymphadenitis.