 The team employs the differential diagnosis method, listing possible etiologies on a whiteboard, then eliminating most of them, usually because one of the team (most often House) provides logical reasons for ruling them out. Typically, the patient is misdiagnosed at least once and accordingly receives some treatments that are at best useless; this usually causes further complications, but — as the nature of the complications often provides valuable new evidence — eventually these help them diagnose the patient correctly. House often tends to arrive at the correct diagnosis seemingly out of the blue, often inspired by a passing remark made by another character. Diagnoses range from relatively common to very rare diseases.
