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Doctor insights on: What Can A Pet Scan Show

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Dr. Guido Davidzon
Board Certified, Nuclear Medicine
13 years in practice
151K people helped
1

1
What can a pet scan show?

Dr. Guido Davidzon
Board Certified, Nuclear Medicine
13 years in practice
151K people helped
What can a pet scan show?

What is the question: Currently pet scans are widely use for evaluation of glucose metabolism in the body. In oncology, is use to for initial metabolic characterization of tumors, metastases as well as for treatment response and surveillance. In cardiology, pet scans are use to assess heart ischemia and viability and in neurology the study is use to evaluate cognitive disorders, epilepsy and brain tumors ...Read more

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Dr. Rashed Hasan
Board Certified
29 years in practice
624K people helped
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Dr. Rashed Hasan
Board Certified
29 years in practice
624K people helped
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Dr. Brian Wosnitzer
Board Certified, Nuclear Medicine
13 years in practice
428K people helped
2

2
Should a pet scan show any cancer?

Dr. Brian Wosnitzer
Board Certified, Nuclear Medicine
13 years in practice
428K people helped
Should a pet scan show any cancer?

Glucose: 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. ...Read more

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Dr. Rashed Hasan
Board Certified
29 years in practice
624K people helped
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Dr. Rashed Hasan
Board Certified
29 years in practice
624K people helped
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Dr. Joseph Accurso
Board Certified, Radiology
24 years in practice
1M people helped
3

3
Why would a pet scan show hyperactivity in an area in the colin where i had a polyp removed 2 months prior?

Dr. Joseph Accurso
Board Certified, Radiology
24 years in practice
1M people helped
Why would a pet scan show hyperactivity in an area in the colin where i had a polyp removed 2 months prior?

Possibly: Pet/ct scans with FDG localize areas with increased glucose metabolism. Although this can be some types of cancer, it also can be due to infection, inflammation and healing wounds. ...Read more

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Dr. Lewis Hassell
Board Certified, Pathology
34 years in practice
157K people helped
4

4
What would a PET scan show that a CT scan may not for a person with pancreatic cancer?

Dr. Lewis Hassell
Board Certified, Pathology
34 years in practice
157K people helped
What would a PET scan show that a CT scan may not for a person with pancreatic cancer?

PET in cancer: PET scans are used to detect areas of abnormally increased metabolism, while CT scans only detect areas of differing density or lucency to radiation. So an abnormality like an area of scarred old tumor might look abnormal on CT scan but not have increased metabolism indicating active cancer on PET scan. False positives still occur with both, but they tend to commplement each other. ...Read more

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Dr. Rashed Hasan
Board Certified
29 years in practice
624K people helped
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Dr. Christian Schultheis
Board Certified, Hematology and Oncology
19 years in practice
1M people helped
5

5
My dad is 53 years old and in good shape. He was diagnosed with stage 4 secondary liver cancer; the primary is still unknown. He has had a CT scan, an endoscopy, and a colonoscopy done. Will a pet scan show something more?

Dr. Christian Schultheis
Board Certified, Hematology and Oncology
19 years in practice
1M people helped
My dad is 53 years old and in good shape. He was diagnosed with stage 4 secondary liver cancer; the primary is still unknown. He has had a CT scan, an endoscopy, and a colonoscopy done. Will a pet scan show something more?

Possibly: More important is the pathology. We rely on pathology and the immunochemistry. The pet may be helpful but sometimes we do not find a primary. This is called a cancer of unknown primary. ...Read more

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Dr. Mary Engrav
Board Certified, Emergency Medicine
26 years in practice
4M people helped
6

6
Can nuerontin cause high suv on a pet scan had breast caner 5 years ago, got a ouple of lumps on my nek, took a pet scan, show lymph nodes under arms, groin, chest, foreman of winslow, and others showed high suv, biopsy from under arm was neg. For lymphom

Dr. Mary Engrav
Board Certified, Emergency Medicine
26 years in practice
4M people helped

Neurontin : Neurontin in very rare circumstances can in fact cause lymphadenopathy (enlarged lymph nodes), but given your history I am very glad that you had a biopsy. Please discuss this carefully with your oncologist given your history. I will wish the best for you. ...Read more

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Dr. Guido Davidzon
Board Certified, Nuclear Medicine
13 years in practice
151K people helped
7

7
What part of the body does a whole pet scan show?

Dr. Guido Davidzon
Board Certified, Nuclear Medicine
13 years in practice
151K people helped
What part of the body does a whole pet scan show?

Eyes to thighs: Even though the study is called whole body pet/ct, most often the image acquisition is from the eyes to thighs. The parts of the body that are included varies from center to center and also depends on the patient's symptoms and cancer histopathology. For e.g. Melanomas can metastasize anywhere in the body and thus real whole body scans are obtained (skull vertex to toes). ...Read more

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Dr. Gerald Mandell
Board Certified, Nuclear Medicine
47 years in practice
4M people helped
8

8
What shows up on pet scan but not on cat scan?

Dr. Gerald Mandell
Board Certified, Nuclear Medicine
47 years in practice
4M people helped
What shows up on pet scan but not on cat scan?

Glucose metabolism: PET with F18 FDG, glucose metabolite, determines glucose metabolism of normal and abnormal structures.For example, sometimes lymph nodes are visualized on CT and do no know whether benign or malignant. In general malignant lesions are more active and have higher metabolism of glucose ...Read more

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Dr. Larry Wilf
Board Certified, Nuclear Medicine
29 years in practice
114K people helped
9

9
Are small liver nodules less than 1cm cancer, didn't show on pet scan?

Dr. Larry Wilf
Board Certified, Nuclear Medicine
29 years in practice
114K people helped
Are small liver nodules less than 1cm cancer, didn't show on pet scan?

Need more info: I would say unlikely if pet/ct liver was negative, but i need to know more about your mediacl history and other tests/treatments you may have had. ...Read more

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Dr. Joseph Accurso
Board Certified, Radiology
24 years in practice
1M people helped
10

10
Does a whole body pet scan show the brain?

Dr. Joseph Accurso
Board Certified, Radiology
24 years in practice
1M people helped
Does a whole body pet scan show the brain?

If it is included: The drug given goes everywhere in the body, including the brain. How much of the body that is imaged depends on the disease being looked for. For lymphoma, scans start at the base of the brain and end at the upper thighs. For head and neck cancer, the scan is from the top of the head to the upper thighs. Melanoma includes the whole body, and seizures is just of the brain. ...Read more

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Dr. Rashed Hasan
Board Certified,
29 years in practice
624K people helped
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