Also known as: Stabbed in the heart
Chase was stabbed by a patient three weeks prior to this episode. He is recovering but dealing with the psychological aftermath and physical rehabilitation, which drives the episode's character arc.
Also known as: Temporal arteritis
A 45-year-old woman entering a cloistered order presents with shoulder pain, then develops multiple complications including carotid dissection requiring emergency surgery. The diagnosis of giant cell arteritis explains her constellation of symptoms and is ultimately treated with steroids.
Also known as: Torn artery in neck
Moira develops a four-inch pulsatile mass in her neck with blood coughing and aphasia. Chase performs emergency surgery to repair the dissection despite ethical concerns about operating on someone he slept with.
Also known as: Speech difficulty
Moira develops speech difficulties due to vascular compromise from her carotid dissection, which improves after surgical intervention.
Also known as: Late-stage syphilis
Initially suspected as causing Moira's symptoms, with nodules mistaken for plaques. She hadn't been sexually active in years, indicating long-standing untreated infection contributing to her vascular disease.
Also known as: PTSD
Chase exhibits clear PTSD symptoms following his stabbing, including fear of returning to work, impulsive behavior, anger toward House, and difficulty with intimacy. He eventually sees a trauma counselor.
Also known as: Seizure
Mentioned briefly at the beginning as a 45-year-old truck driver with recurrent seizures that House is asked to consult on, but Chase refuses the case.