Hello all I am new here and just wanted some information. I recently had a routine physical and they determined I had enlarged lymph nodes. I had 2 CT scans on my neck, abdomen, and stomach. They have found a lymph node behind my chest bone not sure of the size and they are sending me to a Thoracic surgeon in a week. Can anyone give any advise to what this may be. I am 41 years old. They have found nothing in any of the other scans at this time. My B12 is dangerously low but otherwise everything else is normal.