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Doctor insights on: Ct Scan Lung Cancer

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How accurate is a ct scan for lung cancer?

How accurate is a ct scan for lung cancer?

CT Chest: has a high sensitivity for detecting lung cancer, approximately 95%, so CT will detect the vast majority of lung cancers. ...Read more

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Dr. Barry Rosen
4,438 doctors shared insights

Cancer (Definition)

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


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How accurate is a ct scan for lung cancer and espohagal cancer?

How accurate is a ct scan for lung cancer and espohagal cancer?

Depending: on the technical factors of the scan, highly sensitive for detecting lung cancer, less so so for esophageal cancers. Small esophageal cancers may be undetectable on CT, endoscopy is the best way to evaluate for that possibility(also biopsy can be performed at the time of endoscopy). ...Read more

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Do non-contrast CT scan miss lung cancer? Is such a scenario common or rare?

Do non-contrast CT scan miss lung cancer? Is such a scenario common or rare?

No test is: perfect, but a properly performed non contrast chest CT should be able to detect lung cancer with a high sensitivity, probably 95%. ...Read more

Dr. Liawaty Ho Dr. Ho
2 doctors agreed:
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Are small nodes seen on lungs thru chest CT scan suggesting lung cancer or something else?

Dr. Liawaty Ho Dr. Ho
2 doctors agreed:
Are small nodes seen on lungs thru chest CT scan suggesting lung cancer or something else?

Not necessary: Are you referring as small lymph nodes or small nodules on the lung? There are other conditions beside cancer that can be presented with small nodes - including infections, inflammation, autoimmune process, etc. So, a good history, examination, blood work and serial imaging would be necessary to be done. Discuss with your md in detail. ...Read more

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Besides 30 pack year history, what are other reasons to recomend CT scan for lung cancer screening? Is this the most accurate predictor of risk?

Besides 30 pack year history, what are other reasons to recomend CT scan for lung cancer screening? Is this the most accurate predictor of risk?

Yes: Currently smoking history is best predictor of risk for smoking associated lung cancers, other known predictors are presence of COPD and prior personal history of lung cancer and significant exposure to aerosolized asbestos. Talk with your PCP if concerned, a case for screening can be made for individuals based on unique combinations of risk factors. ...Read more

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Can CT scan miss lung cancer ? Can an MRI find it while doing scan on thorastic spine? Both without contrast

Both: Yes. And yes. However, since mris are very hard to obtain of the lungs due to lung movement, ct scans are much more useful and diagnosing lung cancer. ...Read more

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Hi docs, can you tell me if small nodes seen on lungs thru chest CT scan are suggesting lung cancer?

Hi docs, can you tell me if small nodes seen on lungs thru chest CT scan are suggesting lung cancer?

Multiple causes/risk: This is one possibility, and the assessment of that diagnosis involves a visit with to a pulmonary specialist. They will recommend further evaluation. If there are multiple nodules, this actually may be related to infection. One example of such an infection is TB. If you have smoked in the past, swollen lymph nodes on the chest CT, or signs of illness, this raises the risk for a malignancy. ...Read more

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Why would a MRI be better at finding mesothelioma and a ct scan better at lung cancer or is there no difference for the 2?

Why would a MRI be better at finding mesothelioma and a ct scan better at lung cancer or is there no difference for the 2?

There are distinct T: CT scan shows the lungs much better whereas MRI shows the pleural surface much better. Since Mesothelioma starts on the Pleural surface, it is easier to detect it on MRI although CT scan will also pick up most mesotheliomas once they grow to a moderate size. ...Read more

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Would PET/CT scan rule out lung cancer. Tested positive 2 years ago for p53 antibodies. Recent CT negative. Still fatigued. Not sure where to go now.

Would PET/CT scan rule out lung cancer. Tested positive 2 years ago for p53 antibodies. Recent CT negative. Still fatigued. Not sure where to go now.

Your GP: still your primary doctor would be the one to resort to , and fatigue doesn't mean that you have lung cancer. Pulmonologist (lung specialists) would be the kind of doctors to seek their help if you do have lung cancer, wish you wellness ...Read more

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What is CT scan usual result for lung cancer?

What is CT scan usual result for lung cancer?

Need biopsy.: A ct scan or chest x ray that is likely positive for lung cancer often shows a mass in the lung area, or by the mediastinum. It is likely rerported as a mass in the lung, suggesting malignancy, but it could be something else, like tuberculosis. So a biopsy of the mass is done to definitively determine what the mass is. ...Read more

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When would you do a spiral CT scan to check for lung cancer?

When would you do a spiral CT scan to check for lung cancer?

High risk groups: It is recommended for two groups: 1- 55 to 74 yo with 30 pack year smoking, current smokers or quit in past 15 years. 2- 50 & older minimum 20 pack years and at least one additional risk factor. ...Read more

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How often should one have a spiral CT scan to check for lung cancer?

How often should one have a spiral CT scan to check for lung cancer?

Depends: Ct-scan screening for lung cancer is appropriate for specific patients that meet certain criteria. See this link: http://www.Cancer.Net/publications-and-resources/what-know-ascos-guidelines/what-know-accp-and-asco-guideline-lung-cancer-screening/recommendations-lung-cancer-screening. ...Read more

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Can you tell on a CT scan if it is lung cancer or something else? What reasons wouldn't a dr do a needle biopsy?

Can you tell on a CT scan if it is lung cancer or something else? What reasons wouldn't a dr do a needle biopsy?

Sometimes: Certain things appear on ct scan, have characteristics of an old scar. No biopsy is needed. Certain spots are too small, too far, too dangerous to reach with a needle. ...Read more

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Can a chest CT scan rule out lung cancer? I have pain in shoulder/clavicle. X ray and CT clear. Pain persists along with sore sternum/throat.

Can a chest CT scan rule out lung cancer?  I have pain in shoulder/clavicle. X ray and CT clear.  Pain persists along with sore sternum/throat.

Yes: A chest ct is a very good test for finding lung cancer because it looks inside the lungs. The shoulder/clavicle pain could be coming from the spine in your neck. If you still have pain, see your doctor again. ...Read more

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Is it possible to get lung cancer from a spiral CT scan?

Is it possible to get lung cancer from a spiral CT scan?

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 more

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Is it feasible to have had small cell lung cancer causing malabsorption for 1 year but not show on CT scan.

Is it feasible to have had small cell  lung cancer causing malabsorption for 1 year but not show on CT scan.

No: Although a negative CT does not guarantee that you are totally free of cancer cells, your malabsorption has nothing to do with the cancer. If you have received radiation for the condition, then that Rx might potentially though unlikely lead to GI changes. ...Read more

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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

At some point: in its development, every cancer is "occult" because it originates on a microscopic level. CT has a high sensitivity for detecting lung cancer, approximately 95%, so CT will detect the vast majority of lung cancers. ...Read more

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Is a MRI better for lung cancer or a ct scan?

CT scan: is the study of choice. MRI is generally not useful in evaluating the lungs for nodules/masses, due to relatively longer scan times, the breathing motion of the lungs creates an artifact that limits visualization. ...Read more

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Can one chest CT scan damage lung and cause lung cancer ?

Can one chest CT scan damage lung and cause lung cancer ?

Not likely: The natural exposure one might get just from where you live may exceed 3msv per year. Living in denver, you might be exposed to 6msv per year. Risk of developing cancer from a properly conducted ct scan is low. I believe the estimated average radiation exposure for a single chest ct is about 5-7msv. A low dose chest ct is about 2msv. ...Read more

Lung (Definition)

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


Dr. Jeffrey Wint
47 doctors shared insights

Lung (Definition)

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