A 20-year-old male asked:
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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.

1 doctor answer
Dr. Paul Garrett
40 years experience Radiology
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.
Answered on Feb 10, 2017
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You are in the clear: It's nothing to worry about if it's the way you said it.
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Only if very small: If a tumor is very small, it is possible to miss. A CT or MRI with contrast can be helpful
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