Enlarged Lymph Node of Middle Chest

40 yr old female, Non-smkr.  Being monitored for auto-immune disease for 3 yrs, but no definitive dx (just connective tissue disease).  Had scleroderma panel done 12/08-Negative.  Had bone tumor devel on left ulnar in 3 mos w/bone pain, sweats- just remvd in Jan-determined to be non-cancerous.  Been sick for month: started w/flu, then bronchitis, now 101 temp again.  Constant chest pain & difficulty breathing.  Dr put me on albuterol inhaler, then Met. Pack (prednisone) with little to no improvement.  Had chest xray on Mon.-cld same day to say there was..."new ill-defined 3cm x 2cm lesion in right hilar region.  No evidence of pneumonia, remaining lung fields clear & cardiac silhouette within normal limits.  Left hilar region remains unchanged."  This xray was compared to prior xray taken on 12/08.  Had CTScan on Weds-cld same day to say "it wasn't lesion, it was lymph node and they are sending me to pulmonologist for biopsy."  All my labs & urine from this week came back OK.  From looking at the xray, it appears the enlarged node may be the mediastinal as it is right in the middle of chest around bronchi area (NOT neck/trachea area).  Any thoughts or possibilities on this finding is greatly appreciated.

[JaynesInPain]

Well my guess was correct regarding which lymph nodes the CTScan was referring to.  Here is what results said:  "there is moderate mediastinal lymphadenopathy, including right paratracheal, precarinal, subcarinal, and bilateral hilar lymphad.  These  lymph nodes appear larger than prior examination 3 months ago, specifically the right paratracheal.  The heart & great vessels are otherwise unremarkable.  There is no pericardial effusion.  The lungs are clear.  There is no focal consolidation, pleural effusion, pneumothorax, or definate pulmonary nodules."  If this were due to recent infection wouldn't it also show on my labs?  Also, if this is sarcoidosis would I have the other symptoms & would nodes be 3cm in size?  Once again..thanks for input.