Which character is House’s longtime friend and an oncologist in House, M.D.?

James Wilson is House’s longtime friend and an oncologist in House, M.D.

Wilson serves as the head of oncology at Princeton-Plainsboro Teaching Hospital. He is one of the few people willing to challenge House directly while still maintaining a deep personal bond with him. Their friendship is central to the series and often provides a more compassionate counterpoint to House’s cynicism.

Robert Sean Leonard played Wilson throughout the series. Wilson’s work in oncology places him in frequent contact with patients facing life-threatening illness, and his professional perspective differs from House’s diagnostic approach. He is also involved in several major personal storylines, including marriages, divorces, and his changing relationship with House.

Wilson should not be confused with Eric Foreman, Robert Chase, or James Cameron, who are members of House’s diagnostic teams. The surname Wilson and the specialty oncology identify House’s closest hospital friend.