When it comes to medical care, you, as the patient, have the right to make an informed decision about each stage of your care. Sometimes, you might choose not to have a specific procedure because of the risks associated with it. However, some doctors may choose not to inform patients about the full risks associated with a surgery or procedure.
Assuming that he will face no ill effects, the patient might choose to go forward with the procedure, only to later end up with significant injuries or limitations related to that procedure.
If your care provider does not provide you with the information you need to make an informed decision, and you end up suffering devastating side effects related to a procedure you would have chosen to avoid, you may have the right to file a medical malpractice claim. Talk to a lawyer to get a better idea of your specific rights.