In House M.D., what disease does Remy Hadley eventually learn she has?

In House M.D., Remy Hadley eventually learns that she has Huntington’s disease.

Huntington’s disease is an inherited neurodegenerative disorder caused by a mutation in the HTT gene. It can produce involuntary movements, changes in coordination, and cognitive or psychiatric symptoms. Because the condition is genetic, a person with an affected parent may face a significant risk of inheriting it.

The series uses Hadley’s diagnosis to explore uncertainty rather than presenting it only as a medical puzzle. She initially faces the difficult decision of whether to undergo predictive testing, since a positive result can reveal future risk even before severe symptoms appear.

This diagnosis belongs to the character Remy Hadley, known as Thirteen. It should not be confused with conditions such as multiple sclerosis or Parkinson’s disease, which can share some neurological features but are distinct disorders with different causes and clinical patterns.