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Ground-glass opacity

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High-resolution CT: increase in density in areas of ground glass and air trapping in lower lobes in patients with hypersensitivity pneumonitis.

In radiology, ground glass opacity (GGO) is a nonspecific finding on computed tomography (CT) scans that indicates a partial filling of air spaces in the lungs by exudate or transudate, as well as interstitial thickening or partial collapse of lung alveoli.

Possible diseases

The differential diagnosis of the many causes of GGO includes pulmonary edema, infections (including cytomegalovirus and Pneumocystis carinii pneumonia), various noninfectious interstitial lung diseases (such as hypersensitivity pneumonitis, Hamman-Rich syndrome), diffuse alveolar hemorrhage, and cryptogenic organizing pneumonia.[1]

References

  1. ^ Jannette Collins, MD; Eric J. Stern, MD (1998). "Ground glass opacity on CT scanning of the chest: What does it mean?" (PDF). Applied Radiology. Retrieved 2012-02-01.
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