Which fictional doctor leads oncology at Princeton-Plainsboro in House M.D.?

James Wilson leads oncology at Princeton-Plainsboro in House M.D. Played by Robert Sean Leonard, Wilson is the hospital's head of oncology and Gregory House's closest friend.

Wilson's specialty means he treats patients with cancer, while House leads the diagnostic medicine department. Their contrasting approaches create a central partnership: Wilson is generally empathetic and socially careful, whereas House is confrontational and willing to violate rules to pursue a diagnosis.

Wilson frequently acts as House's sounding board. He challenges House's assumptions, helps interpret his behavior, and sometimes becomes involved in the consequences of House's decisions. Their friendship remains important even when House's actions damage Wilson's personal or professional life.

The role is distinct from Wilson's personal relationship with House. He is not House's supervisor, and he does not lead the diagnostic team. Lisa Cuddy is the dean of medicine, while House oversees diagnostic cases. Wilson's professional identity is specifically oncology.