Also known as: High blood pressure in the lungs
Melanie has severe pulmonary hypertension causing her heart to fail from extra strain. The team performs a rare piggyback heart transplant, leaving her original heart in place and adding a donor heart to support it.
Also known as: Bulging blood vessel in the aorta
During surgical planning for Melanie's piggyback transplant, the team discovers an aortic aneurysm that threatens the surgery. They ultimately replace the entire ascending aorta with a Teflon graft to enable the dual-heart transplant.
Also known as: Brain cancer
A homeless man initially believed to have schizophrenia is diagnosed with a parietal brain tumor causing his paranoia and personality changes. Surgical removal of the tumor restores his original personality, reuniting him with his family.
Also known as: Brain cancer
Dr. Glassman undergoes pre-operative testing and planning for his brain cancer treatment, including surgery, radiation, and chemotherapy. This is a major recurring storyline introduced in the previous season.
Also known as: Athlete's foot
Shaun notices early-stage athlete's foot on the homeless patient during initial examination at the mobile clinic, advising him to keep it dry and clean.