TriangleFOR PATIENTS · SOURCE READING
Treatment of Seminoma
Source: Extragonadal Germ Cell Tumors Treatment (PDQ®)–Patient Version, National Cancer Institute.
Source updated: February 19, 2025 · Captured 2026-09-09.
Selected source text with whitespace normalised. This Triangle page is not an NCI PDQ summary. Independent clinical review is pending.
Treatment of seminoma extragonadal germ cell tumors may include:
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Radiation therapy for small tumors in one area, followed by watchful waiting if there is tumor remaining after treatment.
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Chemotherapy for larger tumors or tumors that have spread. If a tumor smaller than 3 centimeters remains after chemotherapy, watchful waiting follows. If a larger tumor remains after treatment, surgery or watchful waiting follow.
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Learn more about these treatments in the Treatment Option Overview.
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Use our clinical trial search to find NCI-supported cancer clinical trials that are accepting patients. You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done. General information about clinical trials is also available.
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Preserved source evidence · Independent clinical review pending · Not medical advice