Head nurse at a nursing home presents with seizure, green urine, bronchospasm, and later brown urine and spider veins. Initially suspected to be Cushing's syndrome, ultimately diagnosed as a carcinoid tumor of the appendix producing excess corticotropin, mimicking Cushing's symptoms. The diagnosis is reached after House investigates why a supposedly predictive cat sat on the patient.
Initial differential diagnosis considered for green urine presentation, quickly ruled out due to absence of fever.
Also known as: Carbolic acid poisoning
Considered as a cause of seizure and green urine due to possible ingestion from antiseptic throat sprays, but ruled out during differential diagnosis.
Also known as: Churg-Strauss syndrome
Considered as explanation for rash and respiratory symptoms, patient started on steroids but diagnosis later changed.
Also known as: Malingering
Initially suspected by Taub due to patient's nursing background and ability to fake symptoms with methylthioninium chloride (causing green urine), but ultimately proven incorrect.
Also known as: Inner ear inflammation
Mentioned as previous diagnosis for Neil's dizziness problem, treated with antibiotics without improvement before Taub performs bedside maneuver.
Also known as: BPPV
Taub diagnoses and successfully treats Neil's chronic dizziness with a repositioning maneuver, identifying calcium deposit in inner ear as the cause.