Doctor insights on:
Could A Ct Scan Be Wrong When Diagnosing Lung Cancer
Could a CT scan without contrast (allergy) be effective detecting lthymoma or small cell lung cancer or could mri no contrast be as good as CT.
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
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
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
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
Is it feasible to have had small cell lung cancer causing malabsorption for 1 year but not show on CT scan.
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
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
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
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
Is it feasible to have had an occult small cell lung cancer causing malabsorption for 1 year but not showing on CT scan?
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
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
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
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
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
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?
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 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
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?
Could this be smallcell lung cancer-Fatigue, muscle&weightloss, no libido, low semen vol, brainfog, wake early am. Testostrone in rnge 295ng/l.CT scan clear?
Here are some...: Small cell ling cancer is the tissue diagnosis under microscope, not a clinical diagnosis. If the reported symptoms are related with cancer, which would progress and reach its advanced stage, but less likely to preferentially affect sexual function. As to ED or general health, refer to the answer to related Q from you. Besides, look up the Facts of Life-1, 2, & 3 in www. ForMeFirst. Com. Best... ...Read more
31 m - Is a bronchoscopy / chest Ct scan with contrast and Vq scan good enough to rule out lung cancer or lung problems?
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
If having Low-dose spiral CT scan chest, or low dose helical CT scan chest, is contrast media injection normally required? Checking lung cancer.
No,: The low dose screening protocol does not require IV contrast. ...Read more
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?
Yes, but with just a: Little more accuracy than a coin-flip based on size. Ct's miss small things, and falsely label benign things cancer. Proving nodal positivity is helped with pet scans, endoscopic ultrasonography with esophagoscopy or bronchoscopy, and sometimes surgery. Why the fuss? If nodes are +, the role of surgery is limited, and surgery is no picnic, and despite trying to prove its benefit, we're not sure. ...Read more
Can CT scan miss lung cancer? Can an MRI find it while doing scan on thorastic spine? Both without contrast
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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