Solitary pulmonary nodule
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A solitary pulmonary nodule (SPN) is defined as a round or oval opacity smaller than 3 cm30mm in diameter. It is completely surrounded by pulmonary parenchyma 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
intra pulmonaryintrapulmonary? - Is the lesion a nodule?
Should-
should be a discrete round oval opacity 4
- 30-30 mm in diameter. Should -
should not be linear or angular
. A -
a mass
more than 3 cm>30mm is usually a bronchogenic carcinoma.
-
should be a discrete round oval opacity 4
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
- vanishing pseudotumour of congestive heart failure
See also
-<p>A <strong>solitary pulmonary nodule (SPN) </strong>is defined as a round or oval opacity smaller than 3 cm in diameter. It is completely surrounded by pulmonary parenchyma and is not associated with lymphadenopathy, atelectasis, or pneumonia <sup>9</sup>.</p><p>Questions to ask when you want to approach a<strong> solitary pulmonary nodule</strong> :</p><ol>-<li>Is the lesion solitary ?</li>-<li>Is it intra pulmonary ?</li>-<li>Is the lesion a nodule?<br>Should be a discrete round oval opacity 4 - 30 mm in diameter. Should not be linear or angular. A mass more than 3 cm is usually a <a href="/articles/bronchogenic-carcinoma">bronchogenic carcinoma</a>.</li>-</ol><h4>Differential diagnosis</h4><p>There are many causes of <strong>solitary pulmonary nodules (SPN)'s</strong>, including:</p><ul>- +<p>A <strong>solitary pulmonary nodule (SPN) </strong>is defined as a round or oval opacity smaller than 30mm in diameter. It is completely surrounded by pulmonary parenchyma and is not associated with <a title="Lymphadenopathy" 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>Is the lesion solitary?</li>
- +<li>Is it intrapulmonary?</li>
- +<li>Is the lesion a nodule?<ul>
- +<li>should be a discrete round oval opacity 4-30 mm in diameter</li>
- +<li>should not be linear or angular</li>
- +<li>a mass >30mm is usually a <a href="/articles/lung-cancer-3">bronchogenic carcinoma</a>
- +</li>
- +</ul>
- +</li>
- +</ul><h4>Differential diagnosis</h4><p>There are many causes of <strong>solitary pulmonary nodules (SPN)'s</strong>, including:</p><ul>
-<li><a href="/articles/bronchogenic-carcinoma">bronchogenic carcinoma</a></li>- +<li><a href="/articles/lung-cancer-3">bronchogenic carcinoma</a></li>
-<li>cutaneous lesion (e.g., wart, mole)</li>- +<li>cutaneous lesion (e.g. wart, mole)</li>
-</ul><h4>See also</h4><ul><li><a href="/articles/pulmonary-nodule-1">pulmonary nodules</a></li></ul>- +</ul><h4>See also</h4><ul>
- +<li><a href="/articles/pulmonary-nodule-1">pulmonary nodules</a></li>
- +<li><a href="/articles/coin-lesion">coin lesion</a></li>
- +</ul>