Right lower lobe consolidation
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At the time the article was created Jeremy Jones had no recorded disclosures.
View Jeremy Jones's current disclosuresAt the time the article was last revised Craig Hacking had the following disclosures:
- Philips Australia, Paid speaker at Philips Spectral CT events (ongoing)
These were assessed during peer review and were determined to not be relevant to the changes that were made.
View Craig Hacking's current disclosures- RLL consolidation
- Consolidation of the right lower lobe
- right lower lobe (RLL) consolidation
Right lower lobe consolidation refers to consolidation in part (incomplete) or all (complete) of the right lower lobe.
On this page:
Pathology
Consolidation refers to the alveolar airspaces being filled with fluid (exudate/transudate/blood), cells (inflammatory), tissue, or other material.
The list of causes of consolidation is broad and includes:
Radiographic features
Consolidation is usually obvious on CT with the anatomical location easy to define through visualisation of the pleural fissures, however features can be subtle on chest radiography.
Plain radiograph
Features of right lower lobe consolidation on CXR include:
opacification of the right lower zone, that may abut the oblique fissure
obscuration of the right hemidiaphragm (silhouette sign)
normal (clear and distinct) right heart border (cf. middle lobe consolidation)
normal (clear and distinct) right superior mediastinal contour (cf. right upper lobe consolidation)
obscuration of the right hilum, particularly the inferior hilum
visible horizontal fissure
on lateral CXR: triangular opacification posterior and inferior to right oblique fissure with obscuration of the dome and posterior aspect of the right hemidiaphragm
General considerations
It must be remembered that the homogeneity of the consolidation will be influenced by any underlying lung disease.
Occasionally with complete lobar consolidation, there may be an increased volume of the affected lobe, rather than the more frequent collapse. When the fissures are outwardly convex, the appearance is referred to as the bulging fissure sign.
A mnemonic to remember the general features of consolidation is A2BC3.
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Differential diagnosis
right lower lobe collapse: will show signs of volume loss
right upper lobe consolidation: may mimic consolidation of the superior segment
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Quiz questions
References
- 1. Webb WR, Higgins CB. Thoracic Imaging. Lippincott Williams & Wilkins. (2010) ISBN:1605479764. Read it at Google Books - Find it at Amazon
- 2. Lange S. Radiology of Chest Diseases. Thieme Medical Publishers. (1998) ISBN:1588904474. Read it at Google Books - Find it at Amazon
- 3. Jannette Collins, Eric J. Stern. Chest Radiology. (2019) ISBN: 9780781763141
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