A 34-year-old woman presented with hypercortisolism resulting from a metastatic pancreatic neuroendocrine tumor. Chest CT revealed patchy consolidation with cavitation and tree-in-bud opacities.

In denoised ULDCT images, fine details were better visualized: tree-in-bud pattern (accuracy, 93 versus 78 to 80 percent), interlobular septal thickening (accuracy, 78 to 83 versus 61 to 67 ...

Chest x-ray demonstrated a sensitivity of 66.7% and a specificity of 100%, while low-dose CT demonstrated 100% sensitivity and 100% specificity for an overall accuracy of 100%.

During the next 5 years, surveillance CT of the chest, abdomen, and pelvis was performed every 6 months. ... Subtle tree-in-bud and ground-glass opacities were present in the upper lobes.