is there a definite test for TB? my mother is being treated with meds for it however the doctors are not sure she has it. Originally they thought she has lung cancer since a 6cm mass was found around the heart area in her lung. The biospy came out negative. She has been tored, fatigued, loss of appetite, and has lost weight and muscle mass. She also has had a cough for 4months. She has has had TB about 35 years ago in her upper right chest area near the shoulder. I asked about the river valley flu and doctor does not think it is that. she is scared that she may be taking the wrond meds since it may not be TB. Please help and is there anything else it could be??? She has a bone mass test for Friday