My father who is 68 yrs. old was admitted to the hospital per the pulmonary and cardio-vascular surgeon requests. He was admitted for the primary reason of attempting to diagnose the lung mass. The lung mass was not able to be diagnosed. Doctors tried to biopsy it through the neck and the chest-to no avail. then tried to do a needle biopsy by the guidance of the CT scanner, again to no avail. Most of the doctors have said that all the symptoms are that of a lung cancer but no specific pathology has been obtained for testing. He is of very high risk. The mass is located behind the pulmonary aorta. We are praying for a miracle. His lung functions are sub-optimal to say the least. What specific blood tests are available for him? His primary care doctor is an internal medicine dr. but WORTHLESS.