House suggests that his patient has Mirror Syndrome. Foreman asks if he means Giovannini's Mirror Syndrome, and House sarcastically asks if he knows of any other mirror syndromes. However, in Season 3, the team treated a woman with just that: Fetal Mirror Syndrome.
When Wilson and House discuss the Mirror Syndrome while walking to the class room, they enter a room with two doors. However, when they are seen entering the room from the inside, it has only one door.