Correct!
4. 1 and 3

The patient’s symptoms are unexplained and pulmonary function testing and a thoracic CT scan are good starting points to evaluated unexplained dyspnea. Endoscopy and/or bronchoscopy seem overly aggressive at this point since there is no evidence of pathology in the lung or the upper gastrointestinal tract.

The pulmonary function tests were unremarkable. The thoracic CT scan is shown in Figure 1.

Figure 1. Left panels (A-F): static representative images from the thoracic CT in lung windows. Right panel: video of representative images in lung windows.

Which of the following best describe the lung findings on the thoracic CT scan? (Click on the correct answer to proceed to the third of fivel pages)

1. Scattered ground glass opacities
2. Traction bronchiectasis
3. Small centrilobular nodules predominately in the lower lungs
4. 1 and 3
5. All of the above

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