This article explores the many possible reasons why a shadow might appear on a lung.
It also describes the imaging tests that might be used to make a diagnosis.
Patterns on the images include:
Typically, the structures seen in these radiology studies overlap.
Verywell / Ellen Lindner
As such, they may be referred to as lesions, spots, or shadows.
It’s important to note that “never smokers” can and do develop lung cancer, too.
Never-smokers are those people who have never smoked or have smoked fewer than 100 cigarettes in their lifetime.
Among the options:
All of these tests have advantages and limitations.
Tests such as X-ray, CT, and MRI are structural tests.
They can tell an abnormality is present, but don’t provide information about the lesion’s activity.
A PET scan can assess levels of metabolic activity.
Most cancers have increased metabolic activity, which is why PET scans are useful in oncology.
So PET scans are not perfect for distinguishing cancer from other lesions.
Does lung cancer show up in blood tests?
Blood tests can’t be used to diagnose lung cancer.
This is quite a range, and your healthcare provider will work with you to pinpoint the cause.
A biopsy may be needed to make a sure diagnosis.
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