What is your differential diagnosis and what further radiological investigations would you perform?
Given the patient's acute history and the local changes on the CXR, pulmonary embolism is a likely diagnosis and is best imaged by CTPA. Other diagnoses could include pneumonia or hilar mass but these could also be seen on CT. There is no evidence of pneumothorax on this film.
What does a "Hampton hump" suggest?
This is a term given to wedge-shaped infarctions following pulmonary emboli. The tissue supplied by the occluded artery can infarct with a rounded appearance on plain films. In this case, it was felt by the radiologist that one was developing in the right lower lobe and the radiologist elected to perform a CTPA immediately.
Patchy opacification at the right base.
No pneumothorax. Normal heart size.
No bony abnormalities.