Ruling out testicular cancer involves a combination of self-examination, a clinical exam by a doctor, an ultrasound, and blood tests. No single step gives you a definitive answer on its own, but together they can either clear you or point toward a diagnosis with high accuracy. Here’s what that process looks like from start to finish.
Start With a Self-Exam
The best time to check is during a warm shower, which relaxes the scrotum and makes it easier to feel the tissue underneath. Set aside about five minutes. Using both hands, gently roll one testicle between your fingers, feeling the entire surface for lumps, hard spots, or swelling. Then switch sides.
A few things are normal and easy to mistake for a problem. One testicle being slightly larger or hanging lower than the other is common. You’ll also feel a soft, bumpy structure along the back and top of each testicle. That’s the epididymis, a coiled tube where sperm mature. It’s supposed to feel different from the smooth, firm testicle itself.
What you’re looking for is a hard lump or area of firmness on the testicle itself. Cancerous masses are typically painless, which is why many people dismiss them. Some men notice swelling instead of a distinct lump, or a dull heaviness in the scrotum. About a third of testicular cancer cases involve some dull pain, and roughly 10% cause acute pain, but the classic presentation is a painless mass.
What a Doctor Checks During a Physical Exam
If you feel something unusual, the next step is a clinical exam. Your doctor will gently hold and roll each testicle between their fingers, looking for a firm mass and determining whether it’s within the testicle or outside it. That distinction matters: masses inside the testicle are more concerning for cancer, while those outside it (attached to surrounding structures) are more likely benign.
Many scrotal lumps turn out to be harmless. The most common non-cancerous findings include hydroceles (fluid buildup around the testicle), spermatoceles (small cysts containing fluid and sperm cells), and varicoceles (enlarged veins along the spermatic cord, similar to varicose veins). Infections like epididymitis can also cause swelling and pain that mimics a mass. Your doctor will consider all of these before jumping to a cancer workup.
Ultrasound Is the Key Imaging Test
A scrotal ultrasound is the most important tool for ruling out testicular cancer without surgery. It uses sound waves to create a detailed image of the testicle’s interior, and it’s painless, quick, and widely available. Ultrasound has greater than 90% sensitivity and specificity for detecting testicular cancer, meaning it catches the vast majority of true cancers and correctly identifies most non-cancerous findings.
The ultrasound can distinguish solid masses from fluid-filled cysts and pinpoint whether a lump is inside or outside the testicle. A simple cyst or hydrocele will look completely different from a solid tumor on imaging. If the ultrasound shows nothing suspicious, that’s strong reassurance. If it reveals a solid mass within the testicle, further steps are needed.
Blood Tests That Help (and Their Limits)
Doctors typically order blood tests for three tumor markers: AFP (alpha-fetoprotein), hCG (human chorionic gonadotropin), and LDH (lactate dehydrogenase). These proteins can be elevated when certain types of testicular cancer are present. They’re useful for diagnosis, staging, and tracking treatment response.
However, normal blood marker levels do not rule out testicular cancer on their own. These markers lack sufficient sensitivity and specificity to serve as a standalone test. Some types of testicular cancer don’t elevate any of these markers. Conversely, non-cancerous conditions can sometimes push levels slightly above normal. Blood work is most valuable when combined with imaging and physical exam findings rather than interpreted in isolation.
Why a Biopsy Isn’t Done the Usual Way
Unlike most other cancers, doctors do not take a needle biopsy through the scrotum to test a suspicious testicular mass. Piercing the scrotum with a needle risks seeding cancer cells into the scrotal tissue and its lymphatic drainage, which follows a completely different path than the testicle’s own lymphatic system. This could spread the cancer to areas it wouldn’t otherwise reach.
Instead, the gold standard for a definitive diagnosis is a radical inguinal orchiectomy. This is a surgical procedure performed through a small incision in the groin (not the scrotum). The surgeon removes the entire affected testicle along with the spermatic cord. The removed tissue is then examined under a microscope, which provides a conclusive answer about whether cancer is present and what type it is.
This surgery serves a dual purpose. It’s both the definitive diagnostic test and the primary treatment. For men with early-stage disease, it’s often curative on its own. More than 80% of men with stage one seminoma (the most common type) and about 70% with stage one non-seminomatous tumors need no further treatment after the surgery.
What If Your Initial Tests Are Normal
If your ultrasound is clean and blood markers are normal, testicular cancer is very unlikely. But if your symptoms persist, don’t assume the issue is resolved. The CDC recommends that men with scrotal swelling or tenderness that doesn’t improve within 72 hours of treatment for an infection should be re-evaluated. If symptoms continue after a full course of antibiotics for suspected epididymitis, doctors are advised to consider alternative diagnoses including testicular cancer, abscess, and other conditions. A repeat ultrasound or referral to a urologist may be warranted.
A Note on Routine Screening
The U.S. Preventive Services Task Force recommends against routine screening for testicular cancer in men who have no symptoms. Their reasoning: testicular cancer is rare, and even advanced cases have very high cure rates, so mass screening is unlikely to improve outcomes meaningfully. The potential downsides of screening (false positives, unnecessary anxiety, and follow-up procedures) outweigh the benefits for the general population. The American Academy of Family Physicians and the American Cancer Society hold similar positions.
That said, self-awareness still matters. Screening guidelines apply to men with no symptoms. If you notice a lump, swelling, heaviness, or pain in a testicle, that’s not a screening scenario. That’s a symptom worth getting checked promptly. Testicular cancer is most common in men aged 15 to 35, and early detection keeps treatment straightforward in the vast majority of cases.