Also known as: Early-onset Alzheimer's
The patient has early onset familial Alzheimer's disease with Brazilian descent, which is the backdrop for the episode. However, the acute medical crisis involves discovering the actual cause of his worsening symptoms, which is ultimately diagnosed as Reye's syndrome.
The ultimate diagnosis for Andres's acute deterioration. He took aspirin for a sore throat (from his wife's flower water), which triggered Reye's syndrome in the context of a viral illness. This caused vomiting, liver dysfunction, high ammonia levels, hematuria, and neurological symptoms that were difficult to distinguish from his baseline Alzheimer's.
Also known as: Cold exposure
The patient wandered out of the hospital in confusion and was found unconscious in freezing weather. He required extracorporeal circulation to rewarm and restore cardiac function.
Also known as: Esophageal tear
Found during endoscopy, the tear was caused by severe vomiting from the Reye's syndrome and explained the gastrointestinal bleeding.
Also known as: Pituitary tumor
House discovers that the husband in the asexual couple has a slow-growing pituitary tumor that has been suppressing his libido since his early teens. This explains his lack of sexual desire, which both he and his wife believed was their natural orientation.
Also known as: UTI
Wilson's patient who identifies as asexual has a common bladder infection, which is the only medical finding in her initial workup before House investigates her husband.