Final answer:
For a patient who is one year post-treatment for testicular cancer and symptom-free, CT scans are generally recommended every 6 months to monitor for recurrence, which aligns with many clinical guidelines for surveillance post-treatment.
Step-by-step explanation:
A patient with testicular cancer who has completed treatment and has been symptom-free for a year would typically follow a surveillance schedule as recommended by their oncologist. Surveillance often includes periodic CT scans to check for any signs of recurrence. The frequency of these scans can vary based on the individual case, the stage of the cancer at diagnosis, and other risk factors. While specific recommendations can differ, many clinical guidelines suggest a CT scan every 3 to 6 months for the first two years after treatment, then spreading out to less frequent intervals as more time passes without any evidence of disease. Since the question proposes timeframes of 3, 6, 9, and 12 months, the closest regimen within the given options that aligns with many guidelines is Every 6 months (Option B), especially taking into account that only one year has passed since treatment completion.