Doctor insights on:
Pet Ct Lung Cancer Diagnosis
No such thing: Pet scan identifies increased cellular metabolism. The suv is a measure of how metabolically active a "spot" or "nodule" is. It does not diagnose. Lung cancer (all cancers) is diagnosed by obtaining tissue and examining by pathologist. Any lung nodule must be thoroughly investigated and closely followed by a comprehensive thoracic team. ...Read moreSee 3 more doctor answers
Cancer is a group of diseases that is characterized by uncontrolled cell growth leading to invasion of surrounding tissues that spread to other parts of the body. Cancer can begin anywhere in the body and is usually related to one or more genetic mutations that allow normal cells to become malignant by interfering with internal cellular control mechanisms, such as programmed cell death or by preventing ...Read more
How often do you need to use PET scan or bronchoscope to locate lung cancer because it does not show on CT scan but symptoms tell you to keep looking?
Clinical judgement: This pathologist is underwhelmed with the health or public benefits of intensive screening for tiny lung cancers. I'd hope that if the person is symptomatic, some other investigations are undertaken and the actual cause gets found. ...Read more
Could my water retention for last two years be due to an undetected small cell lung cancer. Sodium has also been low over this time but pet/ct clear.
It is extremely: unlikely that you would survive for two years with undetected and untreated SCLC. Therefore it is unlikely that water retention would be caused by undetected SCLC. Low sodium and "water retention" suggests to me that you are over hydrated. Restrict your total fluid intake to <1.2 Liter/24 hours for three weeks and see if your retention resolves and your sodium improves. ...Read more
20 months fatigue. LDCT negative in Aug 16. Ongoing sympts PET/CT neg in Nov16. Still fatigued & muscle loss, scan further for lung cancer? Thanks
In past 3years I have had 3 CT scans and 1 pet/ct scan all negative. Do I need more scans to rule out lung cancer? Still have fatigue and muscle loss
You don't have it: Whether scans cut a risk of one's actually dying of lung cancer is a question I will leave to policy-makers. But your fatigue and muscle loss are not due to lung cancer. I'm glad you're health conscious; I assume you've stopped smoking; and my hope for you is that you'll search for some other explanation AND continue an athletic, fitness-focused lifestyle to richly enjoy these years of your life. ...Read moreSee 1 more doctor answer
Fatigue for 2 years with some muscle loss. Pet/ct scan was negative. What is chance of it missing lung cancer (exsmoker sorry, clean 2 years). Thanks?
Not zero: But very small. No test is perfect. There are a number of reasons for missed diagnosis of lung cancer. However, a PET CT is the best way to identify lung cancers. Not all nodules seen on CT are positive on PET but this is rare. If no nodules are seen on PET or CT, then the likelihood is less than 2-3/10,000. If you are worried, you can have a follow up low dose screening CT. PET is not needed. ...Read more
Does a negative pet/ct exclude lung cancer as a cause of my non specific symptoms including fatigue, muscle loss and night sweats. Thank you.
Possible Not Likely: Medical radiation is estimated to cause about 1% of cancers. Patients trested with radiation therapy have about a 0.5% chance of having a radiation related 2nd cancer. The risk from a single spiral ct is considerably less and would likely occur 10-20 years after the exposure. Bottom line is that tests like ct scans should only be ordered for good reasons. ...Read moreSee 1 more doctor answer
Is it feasible to have had small cell lung cancer causing malabsorption for 1 year but not show on CT scan.
Is it true that the primary tumor in small cell lung cancer is often occult? Does this mean even a CT scan can't see it? Do we only detect on spread
Imaging - is contrast enhanced ct useful for finding early small cell lung cancer? I understand low dose ct is not good for early sclc is this true?
You need a good Doct: You are getting too deep into medical areas which are beyond your comprehension. You will benefit from seeing a medical doctor(Internist) who can counsel you and guide you further by educating you about your health concerns which appear to be way beyond reason. ...Read more
See answer: Pulmonary ct is extremely sensitive in identifying lung nodules. When found, these nodules then need to be appropriately evaluated either with followup lung ct, pet-ct, or direct tissue sampling. Your clinical dr. Can best advise you – or you can be seen at a dedicated lung nodule center. ...Read moreSee 1 more doctor answer
"Nodule": A solid mass or nodule however it is difficult to define benign vs malignant. Pet/ct may more helpful where there is suspicion. However, this may also limited in differentiating infection/ inflammation from cancer. That being said, imaging does not arrive at a pathological diagnosis. When possible, any suspicion of lung cancer requires pathological confirmation through a biopsy. ...Read moreSee 2 more doctor answers
Deoxygenated blood enters the lungs from the right side of the heart and travels to the lungs. When you inspire, oxygen flows into the lungs, transverses the capilliares and attaches to hemoglobin down a gradient. At the same time, co2 diffuses into the capilaries and is expelled with exhalation. Oxygen rich blood then flows to the left side of the heart and into the ...Read more
Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! the image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more
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