Background and purpose: Routine posttreatment surveillance is recommended after adjuvant radiotherapy for stage I seminoma. However, systematic studies on the value of follow-up in these patients are missing. This report addresses the efficiency of routine follow-up in stage I seminoma with particular reference to the mode of detection of relapse and the costs of posttreatment screening.
Patients and methods: All follow-up investigations of a prospectively followed cohort of 675 patients with stage I seminoma treated with PA radiotherapy were analyzed with respect to the first indications of relapse, patterns of recurrence, risk factors of relapse, and cost-efficiency of the different technical examinations of the follow-up schedule over a 10-year period.
Results: With a median time to follow-up of 61 months, recurrence was diagnosed by symptoms or physical examination in 14 out of 26 relapsing patients. Among the technical follow-up investigations abdominopelvic imaging had the highest detection rate for relapse, while thoracic imaging and marker analysis were inefficient. Abdominal sonography had the highest cost-efficiency of all technical follow-up investigations, while computed tomography (CT) scans were responsible for approximately 60% of all costs. The authors failed to identify risk factors predictive of relapse after adjuvant irradiation.
Conclusion: Routine technical investigations during follow-up after PA radiotherapy for stage I seminoma yield only a low detection rate of relapse from cancer. The data presented here provide no evidence for the value of technical follow-up beyond the 3rd year after treatment or routine screening of the chest. Thorough physical examination of the patients should be encouraged. Patients should be informed about potential symptoms indicative of recurrence. Restrictive use of abdominopelvic CT scans will reduce exposure to ionizing radiation and considerably increase the cost-efficiency of follow-up.