I know exactly what your saying mate.
But once under the knife always under the knife.

 As a pinball mate maybe give the black salve or what you are ok with a go before you go under the knife again.
It will remove everything cancerous from under the skin also so dont worry about that.
The next thing you need to do is stop drinking coke and any other product that is acidic as this intake causes cancer of any kind to flourish in your body. Sadly that includes alcohol but,,, you can neutralize this.
Not preaching mate,,, as I struggle meself to give up these good things in life.
Anyways, go alkaline in your diet and you will be surprised how your body changes for the better.

 No cancer internal or external can grow in an alkaline environment. Cancer can only grow in an acidic environment.
That is a scientific fact, and I did years of research before I solved my own issues.

Regards...