2г—3 — Dr. House:

The episode opens with three identical 19-year-old sisters—Maya, Lea, and Chloe—admitted to Princeton-Plainsboro. They were performing a synchronized gymnastics routine when Maya went into respiratory failure, Lea suffered a seizure, and Chloe remained perfectly fine—until she began experiencing "sympathetic" pain so intense it mimicked a heart attack. The Investigation

House discovers that the sisters were all taking a specific "natural" performance-enhancing supplement to stay thin for gymnastics. Because of a rare phenomenon in female development (skewed X-inactivation), each sister's body processed the supplement's toxins differently: Dr. House: 2Г—3

The title refers to a high-stakes medical mystery where Dr. Gregory House must solve a case involving a set of triplets whose identical DNA makes diagnosing their divergent symptoms a nightmare . The Case of the Mirror Triplets Because of a rare phenomenon in female development