what does cancer look like on a pet scan

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What does breast cancer look like on a pet scan?

Bright

Breast_carcinoma
PET scans take advantage of the thought that most caners are more metabolically active than the normal tissues around them. This makes the cancers show up as "hot" or "bright" on PET imaging. There are other areas that are "bright" normally as well, like brain and to some extent liver. However, when using PET for breast cancer staging one is looking to see if there are unexpected bright areas.
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Dr. Keith S. Blum answered:

What does a pet scan with cancer look like?

Hypermetobolic

Cancer
A pet scan will show increased metabolic activity or a area of locality that is different from surrounding tissue indicating area concerning for cancer
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On a pet scan, are the dark areas cancer?

Yes and no

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Areas with cancer are usually hypermetabolic in a PET scan due to the increased uptake of the radioactive glucose by cancerous cells. Looking at an FDG PET scan alone, you can grossly see "dark" areas in the brain, heart, kidneys and bladder and these are due to physiologic distribution/excretion of FDG. Not all "dark" is cancer and cancer is often but not always "dark".
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Dr. William Singer answered:

Does Metabolism of the brain mean cancer somewhere in your body? Dr. said PET scan to be done to look for cancer due to brain metabolism. Confused!

PET scan

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There are many causes of abnormalities seen on PET scan. Pet scans reveal brain metabolism. Tumors can alter brain metabolism but not all causes of abnormal brain metabolism shown on PET scan are tumors.
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Dr. Joseph Accurso answered:

Lost about 50 pounds and have tenderness on right side and small lump. Doctor ordered PET scan also said it looks like cancer thank you in advance

Complete the workup

Pet_scan
Get the PET scan and any other labs and tests your health care provider thinks are necessary. Unexplained weight loss is a sign of cancer. Lumps and tenderness need to be explained too. Get all the information possible, perhaps including a biopsy, so a proper plan of action can be determined.
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Should a pet scan show any cancer?

Glucose

Pets
Pet scan relies on the theory that tumors utilize a significant amount of glucose. Many different types of cancer can show up on pet scan but certain types of cancer are much more FDG avid. Low grade tumors usually have much less uptake than high grade tumors. In addition, mucinous neoplasms often do not have much FDG uptake. Small size tumors or micrometastases also may not show up on pet.
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Odds of Pet scan missing bone cancer?

Yes

Cancer
pet measure metabolic activity and yes they miss bone tumour and metastasis if small,not much metabolic activity and bone scan,mri is better
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Could a pet scan detect ovarian cancer?

Possibly

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If tumor metabolically active will pick up isotope F18 FDG , analog of glucose. Imaging with Pet ct will detect abnormality. Most malignant tumors are active, but not all.
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Are bright orange spots on pet scan cancer?

Tricky

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Not all cancers are bright on PET scans and not all bright activity in a PET scan is cancer. Inflammation/infection can also show bright activity. PET scans are performed in conjugation with CT (PET/CT) and though PET is great for detecting metabolism, its specificity is not as great. Reading a PET requires care/skill. Normal activity is seen in the brain, heart, liver, spleen, kidneys, bladder.
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Clear pet scan with metastatic cancer, what does it mean?

PET scan

Cancer
PET scans are often used to look for metastatic disease and a clear scan means no obvious disease noted, a good sign but does not always guarantee one is disease free.
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