Testicular Lumps, Swelling, and Pain in Young Men

Both send a young man to the same part of the body. They run on completely different clocks.

Sudden, severe pain in one testicle is a surgical emergency. MedlinePlus puts it plainly. In torsion the testicle twists in the scrotum and loses its blood supply. Losing that supply for only a few hours can kill the tissue and cost the testicle. The instruction is to call 911 or be seen at once.

A firm, painless lump is not that. It is still abnormal. It still needs an ultrasound rather than a month of waiting. But it belongs in a clinic this week, not an ambulance tonight.

Telling the two apart is mostly about speed of onset and pain. Torsion starts abruptly and hurts badly. Nausea and vomiting often come with it. A tumor usually shows up as a painless change in size or firmness, noticed in the shower.

The numbers here are worth carrying. StatPearls describes the usual window for surgery and testicular salvage as about 6 hours from the onset of pain. For men seen inside those first 6 hours, the salvage rate is close to 100 percent. It falls below 50 percent once the delay runs past 12 to 24 hours.

Overall, StatPearls records that 20 to 40 percent of torsion cases end in removal of the testicle. Delay is the thing that moves that figure. The risk of losing a testicle is described as higher among Black patients and among younger boys.

Two practical points follow from the clock. Ultrasound is not a perfect test. StatPearls notes that around 40 percent of newborn testicles show no color flow on Doppler at all. Where suspicion is high, a urologist should be called at once, without waiting for the scan to confirm it.

Most scrotal swelling has nothing to do with cancer. MedlinePlus lists a long set of causes. They include epididymitis, orchitis, hernia, hydrocele, varicocele, injury, surgery in the genital area, fluid retention and heart failure. Torsion and testicular cancer sit on the same list.

The examining clinician sorts these by feel and by history. Did it come on fast or slowly? Does it feel like fluid or like tissue? Is it one part of the scrotum or the whole thing? Was there recent injury, surgery or infection? Does it settle after lying down? A varicocele often does.

The exam plus that history decides whether any test is needed. Where the answer is yes, scrotal ultrasound is the usual test.

There is a common belief that young men should run a monthly self-check the way women are told to know their breasts. The USPSTF does not support that.

Its recommendation is a Grade D: it recommends against screening for testicular cancer in adolescent or adult men, by clinician exam or by self-exam. The reasoning is stated in the recommendation itself. Most cases are found by accident, by patients or their partners. There is inadequate evidence that a formal check finds cancer at a more curable stage. And the disease is rare, with a high cure rate even when it is advanced.

The task force was careful about the flip side. After public comment it revised the statement, because some readers worried it might stop men with symptoms from seeking care. A Grade D against routine screening is not advice to ignore a lump that is already there.

For a solid mass inside the testicle, the order of events is fixed. It matters.

NCI states that serum AFP, beta-hCG and LDH should be measured before the involved testicle is removed. The reason is not curiosity. In nonseminoma, how far the markers fall after surgery is one of the strongest signals of outcome. That comparison is not possible without a number from before.

The markers behave differently. AFP is raised in 40 to 60 percent of men with nonseminoma. Seminomas do not make it at all. So a raised AFP means a mixed germ cell tumor, even when the pathology reads pure seminoma. The exception is a better explanation, such as liver disease.

Beta-hCG is raised in about 14 percent of stage I pure seminomas before surgery. It is raised in roughly half of metastatic seminomas. LDH rises in both types. It also rises in many conditions that have nothing to do with cancer. NCI cites a study of men on surveillance. In it, 7.7 percent had a raised LDH unrelated to cancer, against 1.4 percent with a cancer-related rise.

One quirk is worth knowing. NCI notes reports of marijuana use raising serum beta-hCG. Some experts retest after a break from it.

The standard operation is radical inguinal orchiectomy with high ligation of the spermatic cord. The cut is in the groin, not the scrotum.

NCI is explicit about why. A biopsy through the scrotum is not considered appropriate, because of the risk of local recurrence. A review of published series using that route found a small but real rise in local recurrence. Cutting through the scrotum opens a different set of lymph channels. The disease can follow them.

Fertility belongs in the same conversation. NCI notes that chemotherapy, radiation and retroperitoneal lymph node dissection can each cause infertility. Sperm banking can be offered before any treatment other than the orchiectomy itself.

SEER measures 94.6 percent five-year relative survival for testicular cancer among men diagnosed from 2016 through 2022. Alongside it, the American Cancer Society projects 9,810 new cases and 630 deaths in the United States in 2026. The median age at diagnosis is 33. It is found most often between 20 and 34.

That outlook does not make follow-up casual. NCI notes that nearly 20 percent of men with seminoma will relapse without more treatment after orchiectomy, even with normal scans and normal markers. For nonseminoma the figure is 30 percent. A rising AFP or beta-hCG is often the first sign. That is why marker checks carry on after surgery.

For how a symptom becomes a diagnosis, see a symptom is not a diagnosis. For what needs a same-day call, see what symptoms to call the oncology team about today.

• NCI PDQ — Testicular Cancer Treatment (Health Professional Version)
• StatPearls — Testicular Torsion (NCBI Bookshelf, NBK448199)
• MedlinePlus — Scrotal swelling
• SEER Cancer Stat Facts — Testicular Cancer
• USPSTF — Testicular Cancer: Screening