Doctor insights on:
Std Uptake Value: Or SUV is a measure of the tumor's metabolic activity. The higher the SUV the more metabolically active the tumor. Metabolic activity often equates with rate of cell division and growth. An SUV of 5.2 is quite high. Values above 2.5 generally are highly suggestive of malignancy. Thanks for trusting HealthTap! ...Read more
No: SUV has no bearing on the aggressiveness of the cancer. It is a relative measure of the glucose metabolism. In fact, some very aggressive tumors have no FDG uptake at all. Some benign conditions like infection can have high uptake. The standard uptake value depends on many factors like patient body size and serum glucose level and the normal uptake in the tissue surrounding the target lesion. ...Read more
A new findin of a liver lesion with 2.8 SUV uptake on pet scan in a colon can patient. Would this b a killed met?
A liver met of 5.2 in a colon cancer pt, does 5.2 SUV uptake mean the cancer is aggressive? Does a higher suv mean more aggressive cancer.?
If a new liver lesion is found in a person with colon cancer History and this lesion was not present before, but the SUV uptake is 2.8, can this be a killed met? The liver background uptake is 3.8.
Probably not: Most lesions that metastasize metachronously post colectomy are viable. Many reside in a reservoir, the bone marrow, and eventually are released to spread to sites like tlie liver. While the SUV value is low there may be some devasularization but that does not rule out viability. A bx is needed to characterize the tumor and then resection or microwave ablation followed by chemotherapy. ...Read more
If a new liver lesion is found in a person with colon cancer History and this lesion was not present before, but the SUV uptake is 2.8, can this be a killed met? The liver background uptake is 3.8. The lesion is 16 mm and Another one is also 16 mm wit
Not sure: If a lesion is under 2.5 cm, it is not big enough to make an accurate judgement as to it's activity. 2.8 SUV is low, so, it is likely to be not cancer. BUT since it is new, I am concerned that it could be a cancerous nodule. Talk to your oncologist. See link: http://www. Uptodate. Com/contents/management-of-potentially-resectable-colorectal-cancer-liver-metastases ...Read more
Paratracheal lymph node grown from 0.6cmx1cm to 0.8cmx1.35cm over 2 years. No SUV uptake on PET. Have fatigue, could this be lung cancer? Lungs clear.
Uncertainty: When a test result comes back as indeterminate, it means "inconclusive." In other words, the degree of uptake into the mediastinal nodes was neither conclusively normal nor abnormal Therefore the conclusion is uncertain or indeterminate. It seems unfair to put you in this medical limbo but your doctor can do further tests to ascertain if the lymph nodes are overactive metabolically. ...Read more
Off meds for hypo, taking uptake scan in a month. Going from hypre to hypo. What to expect? Nervous, of what is going to be the out come?
What does moderate to severely decreased uptake of the radiopharmaceutical by the inferior-inferolateral wall mean?
Risk for MI.: This seems to suggest that the defined areas of the heart are at risk for damage. This seems to suggest that a blockage exists to the blood flow to those parts of the heart, which can lead to a heart attack. This needs to be investigated further and treated. You need an angiogram. ...Read more
I take it that you have had a contrast imaging of the knee.
The term means that there is a filling defect in part of the knee (probably cartilage) that was filled with the contrast material and that how it is shown on the image.
Probably the defect is secondary to overuse of the knee. ...Read more
If I had rai uptake scan done 6 months ago, should I have another one done if my symptoms still persist?
Depends: Usually radioiodine uptake and scan are performed for hyperthyroidism or hypothyroidism. Medications are usually prescribed for these diseaes. Radioiodine therapy is sometimes used for hyperthyroidism. Unless your physician feels because of therapy issues or change in symptoms, the test is not usually repeated on regular basis. If following thyroid cancer, that scan is done for surveillance. ...Read more
I have to go off of my hypothyroid medication for over a month to prepare for my scan and uptake. What kind of symptoms can I expect from being off?
Hypothyroid symptoms: Common symptoms of low thyroid = hypothyroidism are: fatigue, feeling cold, constipation, weight gain. It can easily be diagnosed from the blood test checking T4 level as well as TSH level. Consult your doctor for your symptoms and have he/she check the thyroid level for you ...Read more
Infant with bilateral upj. Severe in left, mild in right. 15/85 function per mag3 scan. Right function now affected (uptake, excretion). Surgery likely for left. How to handle right? Worrisome?
Increased activity: Strong uptake on bone scan means increased metabolic bone activity. This could indicate inflammation, fracture, infection, and/or bone tumor. These results usually are considered in the face of plain x-rays and exam to determine the diagnosis. Sometimes mri/ct scan are also needed. ...Read more
May be nothing: If the rest of the tests are normal, and the t3ru (t3 (liothyronine) resin uptake) is abnormal, the thyroid is probably working normally. T3ru reflects the amount of thyroid binding proteins in the blood, and can be high in women taking birth control pills, estrogen or who are pregnant. It's main use is to correct total T4 levels for protein changes, but is less useful since most labs check free T4 instead now. ...Read more
If I understand the:
Question correctly, the right kidney renogram shows decreased uptake of tracer, which means decreased kidney function, possibly chronic renal disease.
Please discuss with your doctor, as this appearance needs to be correlated with your medical condition and the reason your doctor ordered the test. ...Read more
1st lab- hyper, second blood lab- hypo with hyper results on uptake and scan. What could be causing this?
It does not make: Sense. Suspect laboratory error for the second TSH but there patients with subacute thyroiditis who show unusual test patterns. Uptake is ususwally very low, though. Your doctor will go by symptoms ...Read more
My endo says that I have hyper due to my palpitations & uptake scan but almost all of my symptoms are hypo. Can I be both?
Thyroid?: I presume thyroid is what you refer to. It would be highly unusual for an endocrinologist to not be able to distinguish between hyperthyroid and hypothyroid. ...Read more
Hi can I have a copy of this article please. I am doing a review 'false-positive' uptake of fdg in a hepatic adenoma thank you dr. Sy lee?
Copy of article?: Not much info in question. If you are not subscribed to the journal the article is in you can usually by it -- especially if you are doing a review. If you are at an academic institution, the library usually has an institutional license to allow journal access. ...Read more
I have to go off of my medicine for hypothyroid for over a month for an uptake scan. I'm nervous about the side effects of being off for so long. Should I be worried?
No.: We do this all the time. If symptoms bother you Cytomel (liothyronine) may be given for up to two weeks before the exam. ...Read more
Uptake on PET: The uptake of 18F-FDG by tissues is a marker for the tissue uptake of glucose, which in turn is closely correlated with certain types of tissue metabolism. Tumors in general are more metabolically active than normal tissues and this difference in uptake is what makes PET scans possible. Tumors that have a higher metabolic rate will have more FDG uptake. Tumors that are less active havel less. ...Read more
One after the other: The exact scanning time after taking the capsule varies according to the isotope and protocol used. For i-123 and low i-131 the uptake and the scan is usually done at 24 hours. A thyroid probe directed to your neck measures the radioiodine uptake, this is follow by a gamma camera scan which makes an image of your thyroid gland based on the radioiodine distribution. ...Read more
Hyperactive Thyroid: It can mean hyperthyroid or TBG def. (thyroxine binding globulin). ...Read more
Some Meds, Iodine:
Please follow the rules provided by the nuclear medicine/radiology department or imaging center exactly! It is very important. Ask them any? 's you have.
External sources of iodine in the diet can affect the test - for example, seaweed with sushi. Thyroid hormone and antithyroid medications can also affect the results.
You want an accurate test, not one confused by these outside influences. ...Read more