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Radiotherapy for stage I seminoma of the testis
A Yoney1, C Yildirim, L Isikli
1Department of Radiation Oncology, Okmeydani Training and Research Hospital, Istanbul, Turkey.
Indian Journal of Cancer
|May 8, 2010
Summary
Adjuvant radiation therapy (RT) after orchiectomy for stage I seminoma is effective. Treatment volume and dosage did not significantly impact outcomes, suggesting 20 Gy in 10 fractions is adequate for stage I seminoma patients.
Area of Science:
- Oncology
- Radiation Oncology
- Urologic Oncology
Background:
- Standard treatment for stage I seminoma post-orchiectomy includes adjuvant radiation therapy (RT).
- Retrospective analysis of patient data to assess treatment outcomes.
- Evaluation of treatment volume and dosage impact on efficacy.
Purpose of the Study:
- To evaluate the effectiveness of adjuvant radiation therapy in stage I seminoma.
- To determine if treatment volume (paraaortic vs. paraaortic and pelvic nodes) affects outcomes.
- To assess the impact of radiation dosage on survival and recurrence rates.
Main Methods:
- Retrospective analysis of 91 stage I seminoma patients treated between 1999 and 2005.
- Patients received adjuvant RT using anterior-posterior parallel opposed fields (linear accelerator or Co60).
- Two treatment arms: paraaortic nodes only (66 patients) and paraaortic plus ipsilateral pelvic nodes (25 patients).
Main Results:
- No statistically significant difference in relapse rates or survival between the two RT field groups (4% vs 6%).
- Overall survival (OS) was 98.8%, with 100% in the dog-leg group and 98.4% in the paraaortic group.
- Univariate analyses showed no significant impact of age, histology, tumor size, rete testis involvement, RT fields, dose, or device on OS or Disease-Free Survival (DFS).
Conclusions:
- Adjuvant RT is a suitable approach for stage I seminoma, including low, intermediate, and high-risk patients.
- A dose of 20 Gy in 10 fractions over 2 weeks is considered adequate treatment.
- Treatment volume and dosage do not appear to significantly influence outcomes in this patient cohort.
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