Chest xray states mild coarsened basilar interstitium likely chronic, calcified hilar lymphnodes ( i am asymptomatic)what could this be.?

There are a number: of causes, such as treated lymphoma, TB, histoplasmosis, sarcoid, silicosis, amyloid, and scleroderma. If you have lived in endemic areas like the Midwest or Southeast US, and/or have had large exposure to construction sites, birds, or caves, and are otherwise healthy, it is likely due to prior fungal infection with histoplasmosis. If so, nothing needs to be done at this point. Talk to your doc.