Prostate cancer and testicular cancer are not the same disease. They develop in different organs, strike at very different ages, and require different treatments. The prostate and the testicles are both part of the male reproductive system, which is likely why the two cancers get confused, but they share little else in common.
Two Different Organs, Two Different Roles
The testicles are two small organs housed inside the scrotum. Their primary jobs are producing sperm and making testosterone. The prostate gland, by contrast, sits deep inside the body, just below the bladder, wrapped around the urethra (the tube that carries urine out). It’s roughly the size of a walnut and produces an alkaline fluid that becomes part of semen, helping to nourish and transport sperm.
Because these organs have different cell types and functions, the cancers that develop in them behave differently at a biological level. Testicular cancers most commonly arise from germ cells, the cells responsible for producing sperm. Prostate cancers typically begin in the glandular cells that line the prostate. This distinction shapes everything from how fast each cancer grows to how well it responds to treatment.
Age of Diagnosis Is Dramatically Different
One of the starkest differences is who gets each cancer. Testicular cancer is the most common cancer in young men aged 15 to 35, with diagnosis rates peaking between ages 25 and 34. Prostate cancer is overwhelmingly a disease of older men, with a median age of diagnosis of 66. The majority of prostate cancer diagnoses occur in men between 65 and 74.
This age gap matters for awareness. A 25-year-old noticing something unusual in his testicle and a 65-year-old discussing screening with his doctor are dealing with entirely different diseases, different timelines, and different treatment decisions.
Risk Factors Have Little Overlap
The biggest known risk factor for testicular cancer is cryptorchidism, a condition where one or both testicles fail to descend into the scrotum during development. Men with a history of undescended testicles have roughly 4 to 7 times the risk of the general male population. Family history also plays a role, and researchers have identified several genetic regions linked to susceptibility. The higher the undescended testicle sits in the body (abdominal versus inguinal), the greater the cancer risk.
Prostate cancer risk factors look completely different. Age is the dominant one, but race and family history are significant. Black men face a notably higher risk of both developing prostate cancer and having worse outcomes, while Asian men have lower risk. Having a first-degree relative with prostate cancer increases your risk even if other screening results look normal. Certain inherited gene mutations, particularly in BRCA2, MSH2, and HOXB13, also raise prostate cancer risk considerably.
Symptoms Feel Different
Testicular cancer often announces itself physically. The most common sign is a lump or swelling in one testicle, sometimes accompanied by a feeling of heaviness in the scrotum. Other symptoms include a dull ache in the lower abdomen or groin, sudden scrotal swelling, and occasionally back pain or breast tissue tenderness. Many men discover it themselves.
Early prostate cancer, on the other hand, frequently causes no symptoms at all. When signs do appear, they tend to involve urination: needing to go more often, difficulty starting the stream, or waking up multiple times at night to urinate. More advanced prostate cancer can cause blood in urine or semen, bone pain, unexplained weight loss, or fevers. Because symptoms often arrive late, screening plays a larger role in detection.
How Each Cancer Is Found
Testicular cancer detection often starts with a self-exam. Monthly self-checks are recommended starting around age 15. The exam is simple: while standing, you gently feel each testicle between your fingers, checking for any hard lumps, changes in size, or areas of tenderness. A healthcare provider should also examine your testicles at least once a year.
Prostate cancer screening relies on a blood test that measures a protein called PSA (prostate-specific antigen). The prostate naturally produces this protein, and small amounts circulate in the blood, but elevated levels can signal cancer. Results are reported in nanograms per milliliter. The American Urological Association recommends PSA screening for men aged 45 to 69, with earlier or later screening considered based on individual risk factors like Black ancestry, family history, or known genetic mutations.
Treatment Takes Very Different Paths
The standard first step for a suspected testicular tumor is surgical removal of the affected testicle through an incision in the groin. This procedure serves a dual purpose: it removes the cancer and provides tissue for diagnosis and staging. The surgical approach specifically avoids the scrotum to prevent cancer cells from spreading through local lymph channels. Depending on the type and stage, additional treatment like chemotherapy or radiation may follow, but surgery is almost always the starting point.
Prostate cancer treatment varies far more depending on how aggressive the cancer appears. Many men with low-risk prostate cancer are offered active surveillance, a strategy where the cancer is closely monitored rather than immediately treated. The goal is to avoid the side effects of treatment for cancers that may never become life-threatening. Patients qualify based on factors like low PSA levels (generally under 10), low-grade tumor cells, and a small number of affected tissue samples. If the cancer shows signs of progressing, treatment options include surgery to remove the prostate, radiation therapy, or hormone-based approaches.
Survival Rates Are High for Both
Both cancers have favorable survival statistics overall, but the details differ. Testicular cancer has a five-year relative survival rate of about 95% across all stages combined, making it one of the most treatable cancers even when caught at later stages.
Prostate cancer survival depends heavily on stage at diagnosis. When the cancer is still confined to the prostate or has only spread to nearby lymph nodes, which accounts for about 83% of cases, the five-year survival rate is essentially 100%. Once prostate cancer has spread to distant parts of the body, that number drops to roughly 38%. This is why screening and early detection carry so much weight for prostate cancer specifically.
Can You Get Both?
Having one does not cause the other. The two cancers arise from different cell types in different organs with largely different risk factor profiles. It is technically possible to be diagnosed with both over a lifetime, especially since testicular cancer tends to occur in younger men and prostate cancer decades later, but one does not increase your risk of the other in any meaningful way. They are distinct diseases that happen to share a general neighborhood in the body.