Correct!
1. CT pulmonary angiography shows right peribronchial and mediastinal lymphadenopathy as well as interstitial abnormalities
Enhanced CT pulmonary angiography confirms the presence of right paratracheal and peribronchial lymph node enlargement as well as the presence of a medial right apical lung nodule. Interstitial abnormalities, at least in part consisting of interlobular septal thickening, are present, but these abnormalities are not fibrotic in appearance- no honeycombing, traction bronchiectasis, or significant architectural distortion is seen. No pleural effusion is present and ground-glass opacity is absent. No evidence of pulmonary embolism is seen.
Based on available information this far, which of the following is the best working diagnosis? (Click on the correct answer to be directed to the fifth of fourteen pages).