Correct!
5. Pulmonary fibrosis
The thoracic CT scan shows peripheral reticular opacities with predominance at the lung bases. There is also subpleural fibrosis with a suggestion of honeycombing, lower lobe volume loss and traction bronchiectasis. These findings are most compatible with idiopathic pulmonary fibrosis (3). The other diseases usually show ground glass opacities, and although ground glass opacities can be seen in pulmonary fibrosis, the degree of fibrosis usually exceeds the degree of ground glass opacities.
Which of the following is the best next step in evaluating the patient?