Testicular Germ Cell Tumors
What is Testicular germ cell tumors?
Testicular germ cell tumors are cancers that begin in the cells that make sperm. These tumors develop in one or both testicles. They account for about 95% of all testicular cancers. Most often, they affect men between ages 15 and 45.
There are two main types of germ cell tumors. Seminomas grow slowly and respond well to radiation therapy. Nonseminomas grow faster and include subtypes like embryonal carcinoma, yolk sac tumor, choriocarcinoma, and teratoma. Some tumors contain both seminoma and nonseminoma cells. The type affects treatment decisions and outlook.
Testicular germ cell tumors are highly treatable, especially when found early. Cure rates exceed 95% for localized disease. Blood tests that measure tumor markers like hCG help doctors diagnose the tumor type and track how well treatment works. Understanding your risk and getting checked when you notice changes can make a life-saving difference.
Symptoms
- A painless lump or swelling in one testicle
- A feeling of heaviness in the scrotum
- Dull ache in the lower abdomen or groin
- Sudden fluid buildup in the scrotum
- Breast tenderness or growth, caused by hormone production
- Back pain if the tumor has spread to lymph nodes
- Shortness of breath or chest pain if the tumor has spread to the lungs
- Changes in testicle size or shape
Some men notice symptoms right away. Others have no pain and only discover a lump during a routine self-exam. Any change in your testicles should be checked by a doctor promptly.
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Causes and risk factors
Doctors do not know the exact cause of testicular germ cell tumors. They develop when cells that normally make sperm begin to grow out of control. Certain risk factors make these tumors more likely. Having an undescended testicle, a condition called cryptorchidism, increases risk about four times. A family history of testicular cancer also raises your chances. Men who had a tumor in one testicle face higher risk in the other testicle.
Other risk factors include abnormal testicle development, being white or Hispanic, and being between ages 15 and 45. Infertility and conditions like Klinefelter syndrome may also increase risk. Height and body size play a small role. Unlike many cancers, lifestyle factors like diet and exercise have not been clearly linked to testicular germ cell tumors. Most men who develop these tumors have no known risk factors.
How it's diagnosed
Doctors diagnose testicular germ cell tumors through a physical exam, imaging tests, and blood work. Your doctor will feel the testicles for lumps or swelling. An ultrasound creates images of the testicles to confirm a mass. Blood tests measure tumor markers like Human Chorionic Gonadotropin, or hCG. This hormone is made by certain types of germ cell tumors, especially nonseminomas.
Rite Aid offers hCG testing as an add-on to help monitor tumor markers. High hCG levels in men can signal a testicular germ cell tumor. Doctors use hCG levels before and after treatment to see if cancer is responding. If imaging and blood tests suggest cancer, surgery removes the affected testicle for examination. A pathologist studies the tissue to determine the exact tumor type. This helps guide treatment decisions.
Treatment options
- Surgery to remove the affected testicle, called a radical inguinal orchiectomy
- Surveillance with regular blood tests and imaging for early-stage seminomas
- Chemotherapy for advanced tumors or high-risk disease
- Radiation therapy, mainly for seminomas that have spread to lymph nodes
- Surgery to remove remaining masses after chemotherapy
- Fertility preservation before treatment, such as sperm banking
- Testosterone replacement if both testicles are removed
- Regular follow-up care with tumor marker blood tests and scans
Treatment depends on tumor type, stage, and whether cancer has spread. Most men are cured with surgery alone or surgery plus a short course of chemotherapy. Your care team will create a plan based on your specific situation. Early detection improves outcomes and may allow less intensive treatment.
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Frequently asked questions
The most common symptom is a painless lump or swelling in one testicle. Many men discover this during a self-exam or shower. Some men also feel a heaviness in the scrotum. Any lump or change in testicle size should be checked by a doctor right away.
hCG testing is very useful for certain types of testicular germ cell tumors. Elevated hCG levels occur in about 40% to 60% of nonseminomas and occasionally in seminomas. Not all testicular cancers raise hCG levels, so doctors use it alongside other tumor markers and imaging. It is especially valuable for tracking treatment response and spotting recurrence.
Yes, testicular germ cell tumors have very high cure rates. More than 95% of men with localized disease are cured. Even when cancer has spread, cure rates range from 70% to 90% with modern chemotherapy. Early detection and prompt treatment lead to the best outcomes.
Men between ages 15 and 45 face the highest risk. Those with an undescended testicle, family history of testicular cancer, or a prior testicular tumor are at greater risk. White and Hispanic men develop these tumors more often than other groups. However, most men diagnosed have no known risk factors.
Doctors recommend monthly self-exams starting in your teens. The best time is after a warm shower when the scrotum is relaxed. Roll each testicle gently between your fingers to feel for lumps, changes in size, or areas of tenderness. If you notice anything unusual, see a doctor promptly.
Most men with one healthy testicle can still father children and produce normal testosterone levels. Your remaining testicle usually makes enough sperm and hormones. If both testicles must be removed, testosterone replacement therapy can maintain hormone levels. Sperm banking before treatment preserves fertility options.
Treatment length depends on tumor type and stage. Surgery to remove the testicle takes a few hours with about one week of recovery. Chemotherapy typically runs for three to four cycles over 9 to 12 weeks. Radiation therapy lasts two to three weeks. Many men return to normal activities within a few months.
Persistently elevated hCG after treatment may mean cancer remains or has returned. Your doctor will order imaging tests to look for tumors. You may need additional chemotherapy or surgery to remove remaining masses. Regular monitoring with blood tests and scans helps catch problems early when they are most treatable.
There is a genetic component, but most cases are not directly inherited. Having a father or brother with testicular cancer increases your risk about four to eight times. Certain genetic conditions raise risk as well. Researchers are studying specific genes involved, but routine genetic testing is not currently recommended for most families.
Unlike many cancers, lifestyle factors have not been clearly linked to testicular germ cell tumors. Regular self-exams are the best prevention strategy. Early detection allows for simpler treatment and better outcomes. If you have risk factors like an undescended testicle, talk to your doctor about monitoring options.