Solitary pulmonary nodule
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Solitary pulmonary nodule (SPN) is defined as a relatively well defined round or oval pulmonary parenchymal lesion equal or smaller than 30 mm in diameter. It is surrounded by pulmonary parenchyma and/or visceral 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 is a mass not a nodule
- should not be linear or angular
Differential diagnosis
There are many causes of solitary pulmonary nodules (SPN)'s, including:
- neoplastic
-
inflammatory
- granuloma
- lung abscess
- rheumatoid nodule
- pulmonary inflammatory pseudotumour - plasma cell granuloma
- small focus of pneumonia - round pneumonia
-
congenital
- arteriovenous malformation
- lung cyst
- bronchial atresia with mucoid impaction
-
miscellaneous
- pulmonary infarct
- intrapulmonary lymph node
- mucoid impaction
- pulmonary haematoma
- pulmonary amyloidosis
- normal confluence of pulmonary veins
Mimics
- nipple shadow
- cutaneous lesion (e.g. wart, mole)
- rib fracture or other bone lesion
- vanishingpseudotumour of congestive heart failure
See also
-<p><strong>Solitary pulmonary nodule (SPN) </strong>is defined as a relatively well defined round or oval pulmonary parenchymal lesion equal 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>, atelectasis, or pneumonia <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 (SPN) </strong>is defined as a relatively well defined round or oval pulmonary parenchymal lesion equal 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>, atelectasis, or pneumonia <sup>9</sup>.</p><p>Questions to ask when you want to approach a<strong> solitary pulmonary nodule</strong> :</p><ul>
-<li><a href="/articles/pulmonary-hamartoma">pulmonary hamartoma</a></li>- +<li><a href="/articles/pulmonary-hamartoma">pulmonary hamartoma</a></li>
-<li>vanishing <a href="/articles/pulmonary-pseudotumour">pseudotumour</a> of congestive heart failure</li>- +<li>vanishing <a href="/articles/pulmonary-pseudotumour">pseudotumour</a> of congestive heart failure</li>
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