Go to Canada to check for tumors or skin diseases?

If it is a benign tumor, there will be no problem.

As for vitiligo, if it is obvious in a large area, the physical examination will make further evaluation to see if you will be infected.

The main items of physical examination, chest X-ray, blood test and urine test, are to check whether the applicant has infectious diseases or any diseases that will cause great losses to the Canadian medical system.

Usually, the benign tumor and vitiligo you mentioned can pass the physical examination.