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Hi. I amCustomerWelcome to Just Answer and thank you for the question.I'm reviewing your question now and will post back with your reply.
I am sorry to hear about your issue .
Dizzy spells in situation where you have had cancer , Cirrhosis , and other health issues , need evaluation , you need to check for BPV ( Benign positional vertigo ) which is because of inner ear issue and can be managed easily , other condition could be heart Rhythm abnormality or Carotid stenosis .
I would like to suggest you to have EKG , Carotid Doppler , while you can go for Scheduled Colonoscopy , no harm to get it done .
Let me know if you have further quires .
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