Can a CT scan miss a brain tumor or mass?

Yes. Ct scans can certainly on occasion miss a small tumor, especially when they are down in the posterior fossa at the base of the skull. Mri scans are more sensitive and less likely to miss a tumor, but even they can on rare occasions miss one that shows up later. These scans are read by human beings, and they can miss something that is there, too.
Not likely. A large brain tumor or mass would not be missed by ct scan. A smaller or vascular lesion could be missed and an MRI is in order if you are symptomatic.

Related Questions

Can a negative ct scan without contrast of the head miss a brain tumor causing headaches?

Yes, it can. Did you go to an ER with H/A & they did a knee-jerk don't-sue-us CT scan which was normal? If you've had H/As for at least 3 years, the chances of finding a tumor on brain imaging are no greater than for someone with no history of H/A. Are your headaches of recent onset, relentless & worsening? If not, you can find something else to worry about, like the outcome of the 2016 presidential election. Read more...
Be reassured. The CAT scan did NOT reveal a tumor, so do not focus upon that type of problem! Instead, find out the type of headache you are experiencing so appropriate treatment can be initiated. If migraine, preventative measures exist, but triggers could involve neck, jaw, dentition, sinuses. Read more...

What are the odds that a CT scan with and without contrast missed a brain tumor?

Overall mri better. It depends whether or not the scan was done with contrast. Chances are low that anything large was missed although smaller lesions go unseen from time to time. Mri is overall more sensitive for showing tumor especially when performed with gadolinium .Unless you are specifically looking for calcium or an MRI is contraindicated , MRI should be the procedure of choice. Read more...
Brain tumor. The odds are not very high but if concerns persist that something could have been missed, a brain MRI with contrast is recommended. Read more...

Would a Brain MRI W/O Contrast & a CT Scan with and W/O Contrast show a brain tumor causing symptoms? Worried that it could have been missed.

MRI. A MRI with contrast is sufficient to detect evidence of a brain tumor. If there is any question as to whether a brain tumor is present or not, one can opt to repeat the MRI of the brain with contrast three months after the last MRI brain was obtained. . Read more...
A brain MRI. With contrast would provide the highest sensitivity for detection of a brain tumor, but considering the negative noncontrast MRI and negative CT with/without contrast, there is a very low likelihood of a brain tumor, and a MRI with contrast would probably only be necessary if there is a high clinical suspicion. Read more...

Would a Brain MRI without Contrast & a CT Scan with and without Contrast show a brain tumor causing symptoms? Worried that it could have been missed.

No symptomatic tumor. It is a pretty safe bet that MRI together with contrast CT can exclude a symptomatic tumor (mass) in the head. That does not mean all causes of headache or neurologic complaint are seen. Only your practitioner can give more advice to "put your mind at ease" and further direct your diagnostic journey. Read more...

I recently had a Head and Neck CT scan. One without and one with contrast. What are the chances a brain tumor causing symptoms was missed?

Very remote. CT scan will pick up a brain tumor easily although it is not the best test for small(tiny) tumors. But then you would not have any symptoms from a small lesion. Please share information about your symptoms with us....we like to have detailed history of what is bothering you to start with. Read more...

Ct scans good for catching brain tumors? I did a CT scan several months ago because I was having head and neck pain. The CT scan turned out to be normal, but the head and neck pain have returned. I was wondering what the odds are that the CT scan missed

Based . Based on the symptoms you are describing, it is extremely unlikely that the previous ct scan missed a brain tumor. Occasionally a ct scan can miss a brain tumor if it is very small. However, there are dozens of possible causes of head and neck pain, and it is unusual for a brain tumor to only cause head and neck pain without other signs or symptoms. Now, add to that the fact that you already had a ct of the head which showed no tumor. I would not worry about a brain tumor unless additional symptoms develop such as seizure, paralysis, loss of feeling in the extremities, vision loss, etc. Read more...
They aregood. Mri are better more sensitive as are ct with contrast or pet enhanced plain ct 83% sensitive congrats on normal ct . This should reassure you along with symptoms which come and go symptoms that go most neck pain is muscular and stress related with associated headaches common tension symptoms brain tumor is far down on the list when you hear hoof beats they are probably not zebras. Read more...