Right middle lobe consolidation

Right middle lobe consolidation refers to consolidation in part (incomplete) or all (complete) of the right middle lobe.

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:

Consolidation is usually obvious on CT with the anatomical location easy to define through visualization of the pleural fissures, however features can be subtle on chest radiography. 

Features of right middle lobe consolidation on CXR include:

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.

Chest
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Article information

rID: 9190
System: Chest
Section: Gamuts
Synonyms or Alternate Spellings:
  • Consolidation of the right middle lobe
  • RML consolidation
  • Right middle lobe (RML) consolidation

Cases and figures

  • Case 1
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  • Case 7
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  • Case 8: pneumonia - cystic fibrosis
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