Second opinion?

Hi all-

I received my pathology report a few days ago. 2.2cm clear cell carcinoma of the R kidney removed via partial nephrectomy. Grade 2 and pT3a. I was told on the report that the margins are not clear and that cells have spread to a segmental branch of the renal vein.

My doctor told me he feels very confident that they got everything during my surgery, and he says that no further treatment is needed at this time. I am basically just supposed to wait until my 6 month follow up scan to make sure that nothing comes back.

I am very new to all of this. My doctor is very experienced and I really do like him, but someone asked me if I was going to get a second opinion just in case. I hadn't even considered this. Did you guys get second opinions on your pathology reports/courses of treatment? I don't even know where to begin or if this is standard practice.

Any advice would be appreciated :)