Not everyone with melanoma receives a scan.
Scans are primarily used when doctors need more information about potential spread of the melanoma, or later to monitor treatment effectiveness or detect changes. The choice of scan depends on what doctors specifically want to examine.
CT Scan
A CT scan creates detailed images of the inside of the body.
Doctors can use it, for example, to examine the lungs, liver, and lymph nodes for any abnormal areas.
MRI Scan
An MRI scan produces images using a strong magnet and radio waves.
For melanoma, an MRI is used, for instance, to examine the brain very precisely if there is a reason to do so.
PET/CT Scan
During a PET scan, a small amount of a radioactive sugar-like substance is administered intravenously.
Cells that use a lot of energy absorb more of this substance. This can highlight areas that require further investigation.
A PET scan is often combined with a CT scan. The PET scan primarily shows where cells are active, while the CT scan shows the exact location of that area.
Ultrasound
An ultrasound uses sound waves to create images.
For melanoma, an ultrasound is used, for example, to examine lymph nodes near the original melanoma.
When are scans used?
For very early-stage melanoma, scans are usually not necessary.
In a more advanced stage, scans can be part of the initial examination or subsequent check-ups. Which scan is needed depends on the stage, previous results, and what the doctor specifically wants to investigate.
What is Most Important to Know?
A scan is intended to provide additional information.
Different scans examine the body in different ways. Therefore, a person might receive a CT scan, MRI, PET/CT scan, or ultrasound, depending on the question doctors want to answer.
Is anything in this explanation still unclear?
