I have been going to Mayo clinic for little over a year and the doctors dont agree on a diagnosis. Most of my doctors dont know what wrong with me and the other doctors think I have Sarcoidosis. My liver doctor was quite sure that I had Sarcoidosis but wanted to check one more thing to rule it out. He said that Sarcoidosis and Tuberculosis act the same way the only difference is the type of granuloma each disease produces. We are talking about Noncaesating and Caesating granulomas. My liver doctor wanted me to get a PPD test for tuberculosis. I remember getting one when I was a kid but it has been so long ago. He asked me if I ever got the TB shot, and I dont think so. The TB shot was administered some time ago to countries with high evidence of TB. Not many people in the United States received the TB shot. Well anyway I got my 48 hour time test and it came back positive. So this is strange! I am not coughing my head off and I only have a few scars on my lungs. Has anyone had a TB test done recently. Am I the only one with this problem. The liver doctor only decided to do the test is because I have a granuloma on my liver. My husband had to be tested because he is in the military and they are about to go out to sea. My husband test came back negative. Thats a relief but it doesnt help me.