What Is a Lower Lobe Infiltrate?

Q:
What is a lower lobe infiltrate?

A:
Generally, a lower lobe refers to the left or right lower lobe of the lung.

So, a lower lobe infiltrate is a finding on the chest X-ray that there’s a gray shadow on the left or right lower lobe of the lung. The shadow may be due to atelectasis (collapse of the lung) or collapse of alveoli, but neither of them are lung infiltrates.

Instead, the shadow that’s really a lung infiltrate is fluid, cells, bacteria, or other substance.

In other words, a lower lobe infiltrate is often:

  • A build-up of fluid (and this condition is called pulmonary edema);
  • Or an infection (pneumonia).

 

Keywords: lower lobe infiltrate; lung infiltrate.

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