The short answer
The Deauville score is a 1-to-5 visual scale used to standardize interpretation of FDG-PET scans in lymphoma. It compares uptake in lymphoma sites with reference areas such as the mediastinal blood pool and liver. The meaning of a score depends on lymphoma type, timing, treatment protocol, and whether the scan is interim or end-of-treatment.
The Deauville score is used mainly in lymphoma PET response assessment.
It is a 1-to-5 visual scale.
Scores compare uptake in lymphoma sites with reference areas in the body.
Ask how your team interprets the score for your lymphoma and treatment point.
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The full explanation.
The short answer
The Deauville score is a 1-to-5 visual scale used to interpret FDG-PET scans in lymphoma. It helps standardize how much tracer uptake is seen in lymphoma sites compared with reference areas in the body.
Why it appears on lymphoma PET reports
Lymphoma treatment often uses PET scans to assess response. A shared scoring system helps oncologists and radiologists discuss whether uptake looks resolved, low, moderate, or high compared with expected reference points.
Why timing matters
A Deauville score during treatment may be interpreted differently from a score after treatment ends. Different lymphoma types and protocols may define PET-negative or PET-positive in specific ways.
What it does not mean
The score does not replace the full report, clinical exam, symptoms, labs, or biopsy when needed. It also should not be interpreted without knowing whether the scan was interim, end-of-treatment, or follow-up.
What to ask next
Ask what your score was, what cutoff your team uses in your situation, whether the score changes the treatment plan, and when the next scan or visit should happen.
Words to know
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Common questions
▸Is Deauville used for every cancer?
No. It is mainly used for lymphoma PET interpretation and response assessment.
▸Does one Deauville score decide treatment alone?
No. Your team interprets it with your lymphoma type, timing, symptoms, scans, and treatment protocol.
Questions to ask your doctor
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