Ground-glass opacity

<p><a href="/facts/Ground_glass/dbceXmJo">Ground-glass</a> opacity (GGO) is a finding seen on <a href="/facts/Chest_radiograph/BUExu2WY">chest x-ray</a> (radiograph) or <a href="/facts/CT_scan/NusPJ2S8">computed tomography (CT)</a> imaging of the <a href="/facts/Lung/gTWXI6Fj">lungs</a>. It is typically defined as an area of hazy opacification (x-ray) or increased attenuation (CT) due to air displacement by fluid, airway collapse, <a href="/facts/Fibrosis/VVSmVgr3">fibrosis</a>, or a <a href="/facts/Neoplasm/K0ytzmPz">neoplastic process</a>. When a substance other than air fills an area of the lung it increases that area's density. On both x-ray and CT, this appears more grey or hazy as opposed to the normally dark-appearing lungs. Although it can sometimes be seen in normal lungs, common pathologic causes include <a href="/facts/Infection/182XrncP">infections</a>, <a href="/facts/Interstitial_lung_disease/0LQEwsGc">interstitial lung disease</a>, and <a href="/facts/Pulmonary_edema/sVS5UDxl">pulmonary edema</a>.
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Ground-glass opacity open-in-new

Ground-glass opacity