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Doctor insights on: What Does Lung Cancer Look Like On Ct Scan

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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

Dr. Barry Rosen
4,351 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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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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Can lung cancer be mistaken for BOOP on a CT scan?

Can lung cancer be mistaken for BOOP on a CT scan?

Boop: Yes BOOP can mimick certain types of lung cancer esp bronchoalveolar type. ...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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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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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

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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?

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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Is it possible that CT scan shows no pleural masses while I have lung cancer and massive effusion?

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

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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

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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?

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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Are small nodes seen on lungs thru chest CT scan suggesting lung cancer or something else?

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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What could a CT scan show six weeks after completion of five SBRT sessions for non-small cell Stage 1 lung cancer?

What could a CT scan show six weeks after completion of five SBRT sessions for non-small cell Stage 1 lung cancer?

Mgt.: The imaging study may indicate reduction in the size of swelling of lymph nodes, thoracic mass size and change in appearance. If there is development of worsening, this can also be identified. ...Read more

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Is it feasible to have had an occult small cell lung cancer causing malabsorption for 1 year but not showing on CT scan?

Is it feasible to have had an occult small cell lung cancer causing malabsorption for 1 year but not showing on CT scan?

Very unlikely: First lung cancer causing malabsorption is very unlikely Second for this to last one year without progression is very unlikely in SMCLC. I think you need to have the dx reevaluated.
Best wishes ...Read more

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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

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Does early stage smalcell lung cancer cause malabsorption? I have had malabsorption for over a year, but a CT scan was clear in Feb, but still worried

Does early stage smalcell lung cancer cause malabsorption? I have had malabsorption for over a year, but a CT scan was clear in Feb, but still worried

See below: Small cell cancer of the lung does not cause malabsorption. Had you had untreated small cell lung cancer for a year, you would likely have the tumor all over in your body.
For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex. ...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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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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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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What are the chances of getting lung cancer from one chest CT scan? I had one chest CT scan month ago and I m worried about cancer risk.

None!: You cannot get cancer from one routine ct scan. It takes more than dozens of ct scans over a life time, even then it is rare to have this problem. Otherwise we will be foolish doing ct scans on people in order to help them! ...Read more

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How reassured would you be that you did not have lung cancer if you had a negative CT scan but still had some of the non respiratory symptoms?

How reassured would you be that you did not have lung cancer if you had a negative CT scan but still had some of the non respiratory symptoms?

Not sure of question: If by "symptoms" you mean a shortness of breath, tiring easily etc., these are very general symptoms that can be attributed to other things like asthma, COPD, etc. Anxiety and stress can also cause these respiratory symptoms.
Good Luck ...Read more

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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

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If I was having possible signs of lung cancer pain in chest cough a ct scan would probably detect the tumor?

If I was having possible signs of lung cancer pain in chest cough a ct scan would probably detect the tumor?

It should per...: Mayo Clinic: "A CT scan can reveal small lesions in your lungs that might not be detected on an X-ray. If you have a cough and are producing sputum, looking at the sputum under the microscope can sometimes reveal the presence of lung cancer cells." Ref: http://www. Mayoclinic. Org/diseases-conditions/lung-cancer/basics/tests-diagnosis/con-20025531 ...Read more

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31 m - Is a bronchoscopy / chest Ct scan with contrast and Vq scan good enough to rule out lung cancer or lung problems?

31 m - Is a bronchoscopy / chest Ct scan with contrast and Vq scan good enough to rule out lung cancer or lung problems?

Lung eval: That is a very through evaluation and should be sufficient. You could see masses, tumors, emphysema, frbrrosis, note if abnormal cells, tell if there are emboli. Adding pulmonary function testing (PFTs) would assess the function i.e. tell if you have asthma. f/u/ w/ doc ...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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Clear CT scan of chest. Worried about lung cancer. Two x rays and one CT clear. But the CT was without contrast & shoulder pain persists. Contrast?

NO!: Lung cancer has been eliminated as a realistic diagnosis. Move on, be glad. There are rather more mundane causes for shoulder pain. See an orthopedic surgeon and find out what's going on with that shoulder. ...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. Andrew Seibert
1 Doctor shared a insight

Computed Tomography (Definition)

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