Correct!
4. The lesion’s chest radiographic features are consistent with an extraparenchymal location.
The “incomplete border” sign suggests that a lesion does not arise from the lung parenchyma (i.e., is extraparenchymal in origin)- such origin could include the pleura or chest wall tissues. In this case no clear osseous destruction or reaction is evidence to suggest an osseous origin, so choice b is not correct. A vascular lesion is not entirely out of the question, but the oblong, peripheral nature of the lesion does not suggest a pulmonary vascular etiology and the lesion shows no connection to the aorta. The lesion does not contain gas and does not project within the lung parenchyma, and appears quite peripherally positioned, making a bronchial origin unlikely. The hallmarks of interstitial lung disease at chest radiography include linear and reticular opacities, sometimes small nodules, all of which are lacking in this case. The mass-like nature of the chest radiographic abnormality does not suggest an origin from the interstitium. SARS-CoV-2 PCR testing was negative.
Which of the following represents an appropriate step for the evaluation of this patient? (click on the correct answer to be directed to the fifth of 11 pages)