The short answer
Most testicular cancers are germ cell tumors, divided into two main types: seminomas, which tend to grow slowly, and non-seminomas, which tend to grow faster. Both are highly treatable, and the type guides treatment.
Most testicular cancers are germ cell tumors.
The two main types are seminoma and non-seminoma.
Seminomas tend to grow more slowly.
Non-seminomas tend to grow and spread faster.
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The simple version
This page explains the main types of testicular cancer and why the type matters. Most testicular cancers are germ cell tumors. These start in the cells that make sperm. They come in two main types: seminoma and non-seminoma. Testicular cancer can usually be cured, even in late stages. Knowing which type you have helps your team choose the right treatment.
Seminoma
Seminoma tends to grow slowly compared to other testicular cancers. Seminoma is very sensitive to radiation. That makes radiation a useful tool for some stages of this type. It is also very sensitive to chemotherapy.
Non-seminoma
Non-seminoma is a group of several related cancer types, not one single type. It tends to grow and spread faster than seminoma. Doctors generally treat it differently. Treatment often relies more on chemotherapy. Some cases also need surgery to remove affected lymph nodes. Some tumors have features of both seminoma and non-seminoma cells mixed together. Doctors treat these mixed tumors as non-seminomas.
Testicular cancer can usually be cured, even in late stages.
Rarer, non-germ cell types
Almost all testicular cancers start in germ cells, like the seminomas and non-seminomas described above. A small number are stromal tumors, such as Leydig cell and Sertoli cell tumors. These behave differently from germ cell cancers. Ask your team what your pathology report says about your tumor type, since it can change the treatment approach.
How the type is confirmed
Doctors almost always diagnose and treat testicular cancer the same way at first. They remove the whole testicle through a groin incision. This surgery is called an inguinal orchiectomy. A pathologist then examines the tissue under a microscope. This confirms the exact type. This step happens for nearly everyone. Doctors avoid a direct biopsy through the scrotum, since it could spread cancer into the scrotum and lymph nodes.
Tumor markers help tell the types apart
Blood tests for three substances help confirm and track testicular cancer. These tumor markers are AFP, beta-hCG, and LDH. These are measured before surgery to help diagnose the cancer. Seminomas do not make AFP, so a raised AFP points to a non-seminoma. Ask your team what your marker results mean for you.
Why the type shapes treatment
After the testicle is removed, the type strongly shapes what happens next. Some people with early-stage cancer may be closely monitored instead of getting more treatment right away. Doctors call this surveillance. Others need chemotherapy, radiation, or surgery to remove lymph nodes in the abdomen. This lymph node surgery is called a retroperitoneal lymph node dissection. That is why confirming the type matters so much.
What to ask your team
- Is my testicular cancer a seminoma or non-seminoma?
- What do my tumor marker levels show?
- How does the type affect my treatment options?
- Is surveillance a reasonable choice for my case?
Sources
Common questions
What are the main types?
Most testicular cancers are germ cell tumors, which come in two main types: seminomas and non-seminomas. Some tumors have features of both, and are treated as non-seminomas.
How do they differ?
Seminomas tend to grow more slowly and respond well to radiation. Non-seminomas tend to grow and spread faster. The type affects which treatments are used after surgery.
Are both treatable?
NCI says testicular cancer can usually be cured, even in late stages.
How is the type determined?
The type is confirmed by examining the removed testicle, along with blood tests of tumor markers (AFP, beta-hCG and LDH) taken before surgery.
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Last updated: 2026-08-18Next planned review: 2027-07-07
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Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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