A 31 year old lady presented to her GP (Klinik Chung) with a 1 month history of chronic cough. A chest radiograph was done.
The x-ray showed a homogenous triangular opacity at the right lower zone with well-defined upper border.
The right heart border can be seen through the shadow but the right hemi-diaphragm and costo-phrenic angle are obliterated.
The findings are consistent with a right lower lobe collapse.
Other features to look for are elevated hemi-diaphragm and depressed right hilum. The radiologic features are summarised in this diagram:
The causes for this kind of lung collapse may be divided into:
- Luminal: causes include aspirated foreign material or mucous plugging.
- Mural: cause is usually due to bronchogenic carcinoma.
- Extrinsic: cause may be due to compression by adjacent mass.
The next course of action would be to do bronchoscopy.