Any medical provider must, by law, give you information that’s relevant to your proposed treatment or medical procedure as well as any other treatment options.  This is so that you can give ‘informed consent’ and make a decision for yourself whether you want to proceed, based on all the facts.
You should be told:
The diagnosis
The prognosis if the condition is untreated
The options for treatment, including:
the nature of the treatment (what is involved);
the risks that you are likely to consider significant of each option; and
the benefits of each option, including how likely it is that each will be successful
In addition, the doctor must answer any questions which you ask.