Mark discusses his upcoming radiation treatment for a possible recurrence of prostate cancer. He shares his experience with androgen deprivation therapy (ADT) and the minimal side effects he has encountered. Mark also explains the process of preparing for radiation, including the simulation and the use of a rectal balloon to protect the rectum. He emphasizes the importance of having the right mindset and staying positive throughout the treatment. Mark concludes by mentioning his upcoming podcast on coping with incontinence and erectile dysfunction.