Hi, doc! My chest PA xray suggests right upper lobe densities, probably koch s infection in etiology of undetermined activity, and suspicious densities, left paracardiac region. Spot view indicates no evidence of gross parenchymal infiltrates. All my lab tests are normal including my WBC count. My last chest xray was 6 yrs ago & the findings were all normal. I have no history of PTB or PNA nor am I suffering from any symptoms of PTB. I only have Allergic Rhinitis. Doc, what could possibly be the explanation for this?