For college professor Chu Nguyen, Ph.D., taking care of his health and eating a plant-based diet is important. So, when he noticed a lump on the right side of his neck, he was concerned.

“I’m a very active and healthy 70-year-old,” says Chu. “I enjoy doing yard work, construction and consider myself a jack-of-all-trades.”

In early December 2021, he called his ENT, but due to the holidays, his appointment was not until the...