Correct!
2. Thoracic CT shows focal lucency with solid and cystic opacity in the peripheral right lung
The thoracic CT shows circumscribed lucency in the right lung, with the inferior medial portion of this lucency showing patchy somewhat tubular opacity as well as more clearly cystic change, possibly even frank cavitation. No pulmonary emboli are seen. The bilateral apices appear normal; no cavitation is evident in these regions. While a somewhat branching appearing opacity is present at the medial right base, no features to suggest an arteriovenous malformation are seen.
Based on the CT appearance, which of the following should be included in the differential diagnosis for the finding at thoracic CT? (Click on the correct answer to proceed to the fifth of seven panels)