A top medical oncologist stated that he had never treated a cancer patient without a second opinion from someone other than an associate of his.
Cancer is a very serious disease that grows geometrically.
If it is not treated properly the first time, there is often no second chance. He is human and could make a mistake. Someone else could see something that he doesn't see. Someone else could know something that he doesn't know. We are not fighting for what treatments a patient receives or from whom.