The pictures are somewhat obvious! - That doesn't mean to say it's cancer - it could be something quite benign - no swollen glands - no other indicative side effects. Could it be polyps in your sinuses? I am no expert - so - I would ask for fresh medical opinions(spend money on) a surgical biopsy and/or a ct-pet scan. You can't compromise your peace of mind and that's what you need. I do hope it all goes well for you. Let us know how you get on.
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