What might an increased SUV in a PET scan suggest?

What might an increased SUV in a PET scan suggest?

• A. Lower likelihood of malignancy
• B. Higher chance of benign growths
• C. Increased risk of cancer
• D. Normal metabolic function

Answer: (C)

An increased SUV reflects greater FDG uptake, meaning higher metabolic activity in the tissue. Cancer cells often upregulate glucose transport and glycolysis, so they take in more FDG than normal tissue. This elevated metabolic activity makes a lesion appear with a higher SUV and increases the likelihood that the lesion is malignant, i.e., an increased risk of cancer. Keep in mind that infections and inflammatory processes can also show higher SUVs, so SUV alone isn’t a definitive diagnosis and should be integrated with CT morphology and clinical context.

An increased SUV reflects greater FDG uptake, meaning higher metabolic activity in the tissue. Cancer cells often upregulate glucose transport and glycolysis, so they take in more FDG than normal tissue. This elevated metabolic activity makes a lesion appear with a higher SUV and increases the likelihood that the lesion is malignant, i.e., an increased risk of cancer. Keep in mind that infections and inflammatory processes can also show higher SUVs, so SUV alone isn’t a definitive diagnosis and should be integrated with CT morphology and clinical context.