A 38-year-old female asked:
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what are hypometabolic tumors mean on pet/ct scan?

2 doctor answers
Dr. Sewa Legha
49 years experience Medical Oncology
May be benign tumor: PET scan shows the degree of metabolic activity and the CT shows the dimensions of the lesion that is producing metabolic activity(or lacking it.). Increased metabolic activity is a common feature of cancer as well as Inflammation. If there is no increased uptake of PET material(that means it is hypometabolic, as opposed to hypermetabolic, the lesion/tumor is unlikely to be Cancer(with a few exe
Answered on Sep 23, 2015
Dr. Brian Wosnitzer
17 years experience Nuclear Medicine
Hypometabolism...: Certain tumors are not very FDG-avid (do not take up much glucose tracer). This includes mucinous tumors and several other types of tumors such as carcinoid, bronchoalveolar lung cancer, and lobular breast cancer. Benign lesions such as cysts can also appear hypometabolic on PET.
Answered on Oct 4, 2015
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A 30-year-old member asked:
Dr. Dan Fisher
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No.: The ct is not good enough. When it is combined with the pet scan it is very good.
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Dr. Michael Gabor
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The substances used: in PET are radioactive tracers that accumulate to varying degrees in sites of metabolic activity. Cancers typically have altered/increased metabolic ... Read More
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Dr. Laurie Harrell
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Better images: In very general terms: Cancers use glucose (sugar) faster than normal tissue. PET imaging provides diagnostic information based on increased glucose u ... Read More
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A 61-year-old male asked:
Dr. Sewa Legha
49 years experience Medical Oncology
PET scan is better: A pet scan can pick up tumors which are not seen with other tests. But even PET scan requires cancer size to be about 1cm or larger. it will not pick ... Read More
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1 thank

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