In Big in the Philippines, he had been diagnosed by Dr. Brennan with Ewing's Sarcoma, a rare type of bone cancer.

What episode did Wendell get cancer?

In Season 9, Wendell attends Booth and Brennan's wedding in the episode "Woman in the White". In the episode "Big in the Philippines", he breaks his arm in a hockey accident. Brennan later determines that he has Ewing's sarcoma, a rare bone cancer.

Why did Wendell Actor leave bones?

Why did Wendell leave bones? Brennan later determines that he has Ewing's sarcoma, a rare bone cancer. Initially, Wendell wants to give up his work and explore the world using what time he has left, rather than suffer through chemotherapy.