Doctor insights on:
Do Pet Scans Show Lung Cancer
Sort of...: The pet scan non-specifically show very metabolically active (consuming lots of energy), and lung cancer and its metastasis fit that category. It is not specific. Benign conditions like sarcoid can also make pet studies glow very brightly as well. Slow growing lung cancer, broncheoalveolar may not be pt avid. ...Read more
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
Life expectancy for lung cancer gone to brain. Pet scan shows no other cancer now, only 1 tumor on brain. Surgery and whole brsin radiation will be?
"oligometastatic": Patients with a single brain tumor as the only site of metastatic disease are called "oligometastatic." the chance of cure, though small, is real. Every cancer specialist has a few such patients. I would strongly recommend aggressive treatment, including either radiosurgery (cyberknife, gammaknife, etc.) to the brain or surgical resection, and again stereotactic or chemoradiation to the lung. ...Read more
Radiology Does a PET scan have a much better chance of picking up a central lung cancer if it was missed at LDCT? Thank You
LDCT is a: Noncontrast lung nodule screening study, and it is possible that small central lesions may not be visualized due to proximity to normal blood vessels or other structures. PET is extremely sensitive, but if a diagnostic contrast enhanced CT scan with thinner collimation and higher resolution is negative, probably unnecessary. ...Read more
Can pet scan always diagnose /confirm presence of lung cancer or can only give indication and later biopsy is vital to confirm cancer if a nodule seen?
Bx definitive: A positron emission tomography (pet) scan is an imaging test that uses a radioactive substance called a tracer to look for disease in the body. It is often used to determine the treatment of cancer, if it is spreading, or improving, etc. Used in combination with tests such as ct or mri, it can provide a very high index of suspicion for cancer, but a bx is always definitive and used for tx. ...Read more
What test is best to rule out lung cancer or lukemia? MRI with contrast or pet scan? Been having heavyness weak pulse for 6 months
Tests: The best test to screen for lung cancer, in my opinion, is a chest ct scan as a conventional chest xray can miss it. A simple blood test, cbc and differential, is adequate to screen for leukemia. These are screening tests but a tissue diagnosis is required in most cases for a definitive diagnosis. Your pulse description is nonspecific. An MD can check your bp and pulse to look for abnormalities ...Read more
My mom has stage 4 lung cancer. The pet scan showed 3 lesions by the spine. Does this mean the cancer has spread to her bones?
By the spine may b: Different than on or in the spine. Ask her Docs for specifics. ...Read more
Since pet scan shows only one area of lung which is very suspicious for malignancy, does that mean if it's cancer that it hasn't metastasis? Thank you
5cm Pleural mass in right lung. Pet scan show not cancer...is surgery still necessary and what are the risks. Thanks?
Lung mass: Something is missing! There must have been symptoms that led to a pet scan. Unless a biopsy was performed how could your doctor simply say that there was no cancer? I hope there was indeed no cancer but the symptoms that led to the pet scan should be a cause for biopsy. Do the doctors have any idea what the pleural mass might be? Please keep me informed. ...Read more
A question of the form can A show B is almost always answered maybe, because you cannot completely exclude the possibility that it may or may not demonstrate the finding in question.
also a mass has to have at least 1, 000, 000, 000 cells before it is visible on a contemporary scan. ...Read more
My pet scan was highly suspicious for malignancy in rt lung. Now onto Bronchoscope so didn't pet confirm cancer? This cancer isn't curable!
PET scan helps but n: A PET scan can show an abnormality where body cells are overactive. This happens commonly with Cancer and with any Infection or inflammation. So a biopsy is required to make the distinction between Inflammation and Cancer. A bronchoscopy may show the tumor or it may be used to get a biopsy by getting near to the tumor ...Read more
3cm nodule on rt lung hilerregion? Pet scan this am, can scan cause cancer & what are side effects? I'm scared to have cancer &nodule in lowerlft lung!
PET scan is the answ:
PET scan is a safe test. It is the best test to find out if the nodule in your lung is benign (no PET uptake) or Cancerous (increased PET update also called Hot scan.
Your doctor will guide you according to the results of your PET scan. Let us know the result when available. ...Read more
I have a 2 CM nodule and smaller nodules in my lungs. Will be getting a pet scan. How quickly will it spread if it's cancer?
What to do if I have a 2cm nodule and smaller nodules in my lungs, going in tomorrow for a pet scan. If this is cancer, how quickly will it spread?
Need evaluation: Proceed with PET scan. ultimately you would need to have a biopsy of the lung mass to establish a diagnosis. If you smoke, please quit. God only knows how quickly it will spread. Having said that- it will depend of the biology of the cancer- some cancers are indolent/slowly growing, and others are aggressive. PET scan will show if there is any other suspicious area- lymph nodes or organs. ...Read more
Does hypermetabolism in the upper right mass of the lung mean cancer? A PET scan was performed on the person
Doesn't sound good: Hi. Going solely on what you've told us, it doesn't sound good. The doctor (s) involved in the patient's care WILL explain the result. Good luck to the patient! ...Read more
Mass in my lung 5cm. Biopsy sample was insufficient. Who can help me to do pet scan...till now they not sure cancer or not. And what risks of surgery?
Any good doctor can: If you have a growth in the lung, you need to be under the care of an internist or an oncologist. What is the specialty of your doctor whom you are seeing now (who ordered your biopsy?). You need to tell us details of your history. Any medical or surgical doctor can order the relevant tests including CT scan or PET scan, but you must go to a specialist if possible. ...Read more
Is it possible that CT scan shows no pleural masses while I have lung cancer and massive effusion?
Unusual but yes.: CT scans have limited resolution. They do NOT see everything. Usually large pleural effusions come from significant disease, but not always cancer. The only way to tell is to have the pleural effusion drained & sent for cytology & other testing (culture). The lab techs can spin down the fluid, isolate cells or bacteria that may be causing it. Talk to a pulmonologist or your primary doc. Good luck! ...Read more
Is it feasible to have had small cell lung cancer causing malabsorption for 1 year but not show on CT scan.
I am an 11 year lung cancer survivor. Why would my CEA level be high, (3.9), & MONO% be high, (13.0), yet cat scans, ultra sounds all show no cancer.
Uncertain: The CEA level is only slightly elevated, and may be due to other factors, especially smoking. After 11 years of being cancer-free, cancer is unlikely, but can't be ruled out, because a recurrence can be too small to detect by ct scans and ultrasound. Your doctor will want to follow you closely. The mono% (monocytes?) doesn't have much to do with carcinoma one way or another. ...Read more
What could a CT scan show six weeks after completion of five SBRT sessions for non-small cell Stage 1 lung cancer?
Can small cell lung cancer cause malabsorption through zolinger Ellison syndrome. Would this be a presenting sign of sclc before it shows on ct scan?
Uncommon: Most Zollinger-Ellison / gastrinoma are from islet cell tumors of the foregut. Oat cell carcinoma can produce other paraneoplastic syndromes, famously the anti-nerve cell ones, before being visible on chest ray, but it announces itself fast enough. And what are you going to without a localized tumor? Take out both lungs? Look for some other cause for any suggestive symptoms. Good question Gill. ...Read more
Fatigue 2 years. CT shows paratracheal node increasing over 2 years, 0.5x0.9cm to 0.7x1.1cm to 0.9x1.35cm. No uptake at PET. Worried about lung cancer?
Pet scan in jan 2013 showed 4 cancerous nodules in lungs from breast cancer. New pet scan july 2013 - lung spots no longer metabolically active; does this mean they are no longer cancerous?
Favorable Response: Pet provides the benefit of early identification of ineffective chemotherapy, particularly metastatic breast cancer, as various alternative treatment options are available & allows patients to be spared the toxicities of ineffective treatments. Complete metabolic response is a great prognostic indicator with significantly increased overall survival compared to patients showing no response. ...Read more
Plureal Mass in left lung 5 cm. I did biobsy and pet scan and no evidence of cancer. What is that. Is it fungus or worm or what I should do. Wheezing?
Pulmonologist: The possibility of a mass requires more diagnostics, with your symptoms it is possible its pnemonia, much less concerning than a cancer mid-lung. Scanning can help, but a pulmonologist can decide the right test to reduce fear and misdiagnosis. Hopefully you are using a broncholdilator among the medications you are using. The pulmonologist can direct specific therapy and help treat what you have ...Read more
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 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
Need more informatio: We need more information to advise you. We need to know your clinical evaluation, laboratory findings, etc ...Read more
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
What is the likelihood of lung cancer when CT scan shows pre-tracheal, subcarinal and right hilar lymphadenopathy. If cancer, is it stage 4 already?
Lung cancer: What did the CT show about the lungs and other organs?, That is usually the criteria for stage IV. Stage IV you have lung cancer in either more than 1 lung or lobe and another part of the body (liver, bone). Having cancer in lymph nodes can be stage II or III depending on size of the lung mass 3 cm. Biopsy would show cancer in lymph nodes, as they can also be enlarged due to inflammati ...Read more
Several Options: Several tests can help stage lung cancer. A contrast enhanced (injected into a vein) CT is the usual first test. The advantage of a PET/CT (not just a PET) is the ability to look for disease in unexpected places (brain for example) or in areas which appear normal on CT, like small lymph nodes. PET shows areas which are using sugar for energy, as some cancers, including lung, do. ...Read more
I will LDCT scan chest check lung cancer. Is there any benefit to having this scan done on a 256 slice vs a 64 slice? I want lowest radiation dose.
Improved view.: 256 scanners are amazing. Much better lung definition. I'm not sure about the radiation dose difference. ...Read more
I have a healthy lung from what the xrays show. Is it still possible I can have copd or early lung cancer. Smoked 4 years on and off. Stopped for 6wk?
Could lung cancer (of any type) not show up on an X-ray after 14 months of symptoms? (Theoritical question not for diag.)
Yes: Especially, adenocarcinomas in the apex can be very small and hide behind other structures. ...Read more
Lung cancer in my twenties? Smoker since 13, no symptoms but I have heard that the first state of lung cancer dosent show any symptoms.
True: First you are very young to have lung cancer at such a young age. Stage I lung cancer is contained to the lung and has not spread to the drainage system like lymphs nodes. Some of those are taken during surgery to determine how extensive the cancer is. A pet scan may also be used to determine the stage of caner. Talk to your doctor, risk factors are probably the key for early detection. ...Read more
It might--or not: Advanced lung cancer would show on x-ray. Earlier cancers are better seen with ct scans. If you have been a heavy smoker for 15 or more years, your risk is certainly much higher of a cancer than a non-smoker. Non-smoking related cancers occur, but usually in much older individuals. ...Read more
Pet scans most often use a radioactive form of glucose, the energy source for most of the cells in our bodies. The pet scanner can detect and measure how much of the radioactive glucose analog, f-18 fdg, is in a particular organ or region. The areas using more glucose are hyper metabolic and generally more worrisome. Our brains and sometimes hearts prefer glucose as food, making ...Read more
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
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