Polymyositis (pulmonary manifestations)
Updates to Article Attributes
Lung involvement in polymyositis can have a number of manifestations inclusive of that resembling interstitial lung disease (for a general discussion of polymyositis - refer to the parent article).
Radiographic features
Plain radiograph
The frequency of a radiographic parenchymal abnormality in an individual with polymyositis is low (ranges around 5%). If present and not complicated with any other problem, it is usually appreciated as a symmetric, basal predominant basal reticular pattern which can progress to being more diffuse with time. Areas of consolidation (often bilateral) may develop in some patients.
Some patients may have an elevated diaphragm from diaphragmatic paralysis.
CT - HRCT
May given either a UIP or NSIP (latter considered commoner) pattern.
Initial findings
Initial CT findings of pulmonary involvement in patients can include
- considered characteristic and reversible CT findings 2
- other findings
Later findings
- honeycombing: may develop in some patients
A proportion of patients may have a pattern somewhat resembling that of cryptogenic organising pneumonia.
Differential diagnosis
Imaging features can often overlap pulmonary manifestations of dermatomyositis
-<li><a title="Prominent interlobular septae" href="/articles/interlobular-septal-thickening">prominent interlobular septae</a></li>- +<li><a href="/articles/interlobular-septal-thickening">prominent interlobular septae</a></li>
Tags changed:
- snippet title