Depending on the type of cancer your parent might be eligible for the Super Visa. Moreover it can be classified as a preexisting condition and covered under the insurance policy.
Here is an abstract from the policy wording of one of the insurance companies:
Coverage is NOT AVAILABLE to any individual who, as of their effective date:
has been diagnosed with stage 3 or 4 cancer, or cancer of the lung, liver, pancreas, or bone;
or has received treatment for any cancer (other than basal or squamous cell skin cancer or breast cancer treated only with hormone therapy) in the past 3 months;
So you can get coverage for that. For someone who is 60 and has a preexisting condition, coverage for 1 year with $100,000 total coverage would range from $1,300 to $2,200 depending on the deductible.
You can take a look at all the options yourself or call 1 877 211 4301 Toll Free for a consultation
<a href=http://arbetovinsurance.com/supervisamedicalinsurance/>Super Visa Insurance Rate Calculator</a>