Also known as: Insecticide poisoning
Initially suspected as the cause of Fran's seizures and neurological symptoms. The team investigates whether international flight pesticide spraying or environmental exposure from her home could be responsible.
Also known as: Breast cancer
House initially theorizes breast cancer with paraneoplastic syndrome causing Fran's symptoms, since anticholinergics (scopolamine) seemed to reduce inflammation and symptoms.
Also known as: Brain bleed
Suspected when Fran develops blindness and becomes comatose. The team debates whether to perform a burr hole or lumbar puncture to diagnose a potential AVM-related bleed.
Also known as: Fish poisoning
Initially diagnosed by House as the cause of Mr. Peng's nausea, vomiting, rash, and abdominal pain from eating contaminated sea bass on the flight. House has the entire plane vomit as a precaution.
Also known as: Meningococcus
Cuddy's initial diagnosis for Mr. Peng's fever, headache, rash, and severe abdominal pain on the flight. She argues they should turn the plane around, but House rules it out in favor of other diagnoses.
Also known as: Radiation poisoning
House theorizes radiation from poorly performed x-rays in North Korea could explain Peng's symptoms, but this is ruled out.
Also known as: The bends
Final diagnosis for Mr. Peng. He went scuba diving the day before and surfaced too quickly, then boarded a pressurized flight at 38,000 feet, causing nitrogen bubbles in his blood and severe neurological symptoms.
Also known as: Conversion disorder
House deliberately induces mass hysteria on the plane by announcing meningitis symptoms, causing multiple passengers to develop psychosomatic tremors, nausea, and rashes. He then reveals the trick to prove it was conversion disorder.
Also known as: Unplanned pregnancy
House diagnoses a female passenger on the plane with pregnancy to explain her nausea, abdominal pain, fever, and rash (PUPPPs). This is part of his statistical probability analysis of the passenger population.