@lokorn: I understand. You like many other patients feel you've developed a relationship and trust with your doctor that you don't want them to feel you're violating. A lot of these type of doctor/patient relationships have developed over time and they become thought of like family. But keep in mind if this is truly a professional you do trust and whose expertise you value, the emphasis is on their professionalism - and that extends to their wanting the best for their patients. This means respecting their patient's autonomy and right to explore their options - in fact, most doctors encourage it if directly asked. I know that's the response I've gotten when I've consulted on my own cancer diagnosis, or my potential need for hip surgery. And it's explained in greater detail here: https://www.lvhn.org/news/dont-think-twice-about-getting-second-opinion

You can be completely honest with your doctor by simply saying you've been very pleased with their care and you're not questioning their expertise, but this situation has been very concerning to you and before you commit to making a decision of this nature, you feel you owe it to yourself that you're doing what's best for you by exploring all options, which very well may be returning for the proposed procedure. If a medical provider objects to that, that might even change your impression. In all liklihood, you'll get your doctor's blessings and your future care will not be jeopardized in the least - by seeking and getting the care you have the right to receive.

Does that make the situation easier?

@lokorn , how would the original doctor know you got the second opinion unless you tell him? If you go back to him, why would he need to know and if you prefer the second doctor, you’d just stay with the second one with future treatments.
I’m not a medical professional, but I am a licensed professional in another field. On a complicated case, I encourage clients to get a second opinion. It might help them feel more comfortable and get additional information. It doesn’t bother me at all.