<prompt> All of the following statements are false regarding sarcoidosis, except:Schaumann bodies and asteroid bodies are not seenBAL broncho-alveolar lavage fluid shows CD8CD4 T cell ratio of 4:1Hilar and mediastinal lymph nodes are sparedCan be associated with unilateral or bilateral iritis or iridocyclitis  <response>: Sarcoidosis The lungs are involved is seen in 90 cases. Clinical manifestations include lymph node enlargement, eye involvement sicca syndrome , iritis, or iridocyclitis, skin lesions e.g., erythema nodosum, and visceral liver, skin, marrow involvement. Lymph nodes are involved in almost all cases, paicularly the hilar and mediastinal nodes. Intra-alveolar and interstitial accumulation of CD4 T cells, resulting in CD4CD8 T-cell ratios ranging from 5:1 to 15:1. Schaumann bodies and asteroid bodies are seen on microscopic examination. These are not pathognomonic of sarcoidosis because these may be seen in other granulomatous diseases e.g., tuberculosis. 