Hi, I read your question regarding doctors finding an enlarged thymus and nodule in your lung. I am wondering what kind of specialist you saw. If I were you, I would get a referral to a cardiac-thoracic surgeon. I wish we would have done this with my mother initially rather than waiting to get a specialist' opinion. They found a "mediastinal mass" on a routine chest x-ray of my mother in December 2005. We live in a small town and she was initially referred to a lung specialist who suspected Non-Hodgkins Lymphoma. He did a "bronchoscopy", which is a computer guided needle biopsy of the mass. We were told a good sample was taken and that the tissue was benign. The doctor recommended CAT scans every three months to monitor the mass. He stated if it did not grow, it was "probably nothing". In November of 2006, just before Thanksgiving, the CAT scan showed the mass had grown. At this point we insisted on a second opinion and went to IU Med Center where Dr. Kenneth Kessler, a reknowned cardiothoracic surgeon suspected cancer. He did a core biopsy which confirmed a diagnosis of Stage 3 invasive Thymoma (cancer of the thymus gland/one of the rarest types of cancer which only one to two percent of the population ever get). She is now seeing one of the only Thymoma specialist in the nation, Dr. Patrick Loehrer at IU Med center and has finished four rounds of chemotherapy. They have scheduled her for another CAT scan in three weeks to see if the cancer has shrunk enough for the tumor to be operable. If so, they will remove the mass. If not, they will do radiation. You are young and, hopefully, you do not have cancer. However, I do not want anyone else to go through what our family is going through and I would encourage you not to wait and to get a second opinion immediately. Cancer is rare in younger people, but it does happen. I wish you and your family the best! Michelle.