Solitary pulmonary nodule
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was changed:
Solitary pulmonary nodule (SPN)is defined as a relatively well defined round or oval pulmonary parenchymal lesion equal to or smaller than 30 mm in diameter. It is surrounded by pulmonary parenchyma and/or visceral pleura and is not associated with lymphadenopathy, atelectasis, or pneumonia 9.
Questions to ask when you want to approach a solitary pulmonary nodule :
- is the lesion solitary?
- is it intrapulmonary?
- is the lesion a nodule?
- should be a discrete round/oval opacity 4-30 mm in diameter; a lesion >
;30mm;30 mm is defined as a mass, not a nodule - should not be linear or angular
- should be a discrete round/oval opacity 4-30 mm in diameter; a lesion >
Differential diagnosis
There are many causes of solitary pulmonary nodules, including:
- neoplastic
-
inflammatory
- granuloma
- lung abscess
- rheumatoid nodule
- pulmonary inflammatory pseudotumour: plasma cell granuloma
- small focus of pneumonia: round pneumonia
- congenital
- miscellaneous
Mimics
- nipple shadow
- cutaneous lesion (e.g. wart, mole)
- rib fracture or other bone lesion
- vanishing pseudotumour of congestive heart failure
- summation of markings
- artifact
See also
-<p><strong>Solitary pulmonary nodule </strong>(<strong>SPN</strong>)<strong> </strong>is defined as a relatively well defined round or oval pulmonary parenchymal lesion equal to or smaller than 30 mm in diameter. It is surrounded by pulmonary parenchyma and/or visceral pleura and is not associated with <a href="/articles/lymph-node-enlargement">lymphadenopathy</a>, <a title="Atelectasis" href="/articles/lung-atelectasis">atelectasis</a>, or <a title="Pneumonia" href="/articles/pneumonia">pneumonia</a> <sup>9</sup>.</p><p>Questions to ask when you want to approach a<strong> solitary pulmonary nodule</strong> :</p><ul>- +<p><strong>Solitary pulmonary nodule </strong>(<strong>SPN</strong>)<strong> </strong>is defined as a relatively well defined round or oval pulmonary parenchymal lesion equal to or smaller than 30 mm in diameter. It is surrounded by pulmonary parenchyma and/or visceral pleura and is not associated with <a href="/articles/lymph-node-enlargement">lymphadenopathy</a>, <a href="/articles/lung-atelectasis">atelectasis</a>, or <a href="/articles/pneumonia">pneumonia</a> <sup>9</sup>.</p><p>Questions to ask when you want to approach a<strong> solitary pulmonary nodule</strong> :</p><ul>
-<li>should be a discrete round/oval opacity 4-30 mm in diameter; a lesion >30mm is defined as a <a title="Pulmonary mass" href="/articles/pulmonary-mass">mass</a>, not a nodule</li>- +<li>should be a discrete round/oval opacity 4-30 mm in diameter; a lesion >30 mm is defined as a <a href="/articles/pulmonary-mass">mass</a>, not a nodule</li>
-<li>normal confluence of <a title="Pulmonary veins" href="/articles/pulmonary-veins">pulmonary veins</a>- +<li>normal confluence of <a href="/articles/pulmonary-veins">pulmonary veins</a>