Conversation: The conversation between human and AI assistant.
[|Human|] A recent mantoux test showed a significant positive, consequently I was asked to have a chest xray.  I had BCG vaccination in 1996.  Xray report showed small calcific denisties in the perphilar regions consistent with healed granulomas.  No active TB.  I had BCG vacination in 1996.  During 2007 I had pneumonia and was hospitalised and later commenced coughing up blood.  Could I have had TB and pneumonia together?  Also could you explain the location of perihilar regions.  Do these calcific densities dissipate?
[|AI|]  * Him means lung roots, comprising major bronchi, main pulmonary arteries and veins.  It is located on the medical side of the lung and is the only site for entry or exit of structures associated with lungs.* Per Hilary calcific densities dissipate or not that depends upon its etiology ( requires biopsy confirmation) and management. Hope this will clear your query. Welcome for any further guidance. Regards.