Ct angiogram shows non calcified opacity on middle lobe 4mm. appearance of benign intrapulmonary lymph node on lung with no pleural abnormalites.

Opacity: The question to your doctor should be - is this an incidental pulmonary nodule or something more concerning. If the ct angio was done for something completely unrelated, and it was a true incidental finding, some guidelines say that under a certain size (4mm) for low risk patients (no smoking, etc), then no follow up is needed. Otherwise a biopsy or interval imaging followup is appropriate.