Ground-glass density nodule
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Ground glass-glass density nodule
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A ground glass-glass density nodule (GGN) is a circumscribed area of increased pulmonary attenuation with preservation of the bronchial and vascular margins. A GGN can be:
- partly solid (part of the ground-glass opacity completely obscures the parenchyma)
- non-solid (no completely obscured areas) - pure ground glass nodules
Although encountered regularly, the incidence of cancer in these nodules has been reported as high as 63% (for partly solid nodules, in one study). Histologically these may represent:
- malignancy
- primary (e.g., bronchoalveolar carcinoma (BAC), adenocarcinoma in situ, minimally invasive adenocarcinoma and invasive adenocarcinoma)
- metastases: occasionally can manifest as ground glass density nodules 6
- atypical adenomatous hyperplasia
- focal interstitial fibrosis
- aspergillosis
- focal pulmonary haemorrhages
See also
-<p>A <strong>ground glass density nodule (GGN)</strong> is a circumscribed area of increased pulmonary attenuation with preservation of the bronchial and vascular margins. A GGN can be:</p><ul>- +<p>A <strong>ground-glass density nodule (GGN)</strong> is a circumscribed area of increased pulmonary attenuation with preservation of the bronchial and vascular margins. A GGN can be:</p><ul>
-<li>primary (e.g., <a href="/articles/adenocarcinoma-in-situ-minimally-invasive-adenocarcinoma-and-invasive-adenocarcinoma-of-lung">bronchoalveolar carcinoma</a> (BAC), <a href="/articles/adenocarcinoma-in-situ-of-the-lung">adenocarcinoma in situ</a>, <a href="/articles/minimally-invasive-adenocarcinoma-of-lung">minimally invasive adenocarcinoma</a> and <a href="/articles/invasive-adenocarcinoma-of-lung">invasive adenocarcinoma</a>)</li>- +<li>primary (e.g., <a href="/articles/adenocarcinoma-in-situ-minimally-invasive-adenocarcinoma-and-invasive-adenocarcinoma-of-lung">bronchoalveolar carcinoma</a> (BAC), <a href="/articles/adenocarcinoma-in-situ-of-the-lung">adenocarcinoma in situ</a>, <a href="/articles/minimally-invasive-adenocarcinoma-of-the-lung-1">minimally invasive adenocarcinoma</a> and <a href="/articles/invasive-adenocarcinoma-of-lung">invasive adenocarcinoma</a>)</li>
-<li><a href="/articles/ground-glass-opacification">ground glass</a></li>-<li><a href="/articles/diffuse-ground-glass-nodules">diffuse ground glass nodules</a></li>- +<li><a href="/articles/ground-glass-opacification-3">ground-glass</a></li>
- +<li><a href="/articles/diffuse-ground-glass-nodules-1">diffuse ground-glass nodules</a></li>
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