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What types of brain tumors won't show up on a CT scan?

1 doctor weighed in

In brief: Small low grade mass

Some small low grade tumors that have not incited vasogenic edema could be missed on ct scanning.
The addition of IV contrast would improve visualization of some tumors, but ct has limits in resolution when compared to mri. These are not the tumors that cause profound symptoms, frequently these small tumors are found incidentally when patients have scans for other reasons.

In brief: Small low grade mass

Some small low grade tumors that have not incited vasogenic edema could be missed on ct scanning.
The addition of IV contrast would improve visualization of some tumors, but ct has limits in resolution when compared to mri. These are not the tumors that cause profound symptoms, frequently these small tumors are found incidentally when patients have scans for other reasons.
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Dr. Bennett Machanic
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