17492 Spermatocele

Overview

A spermatocele is a fluid-filled cyst that develops in the epididymis — the small, coiled tube at the back of each testicle that stores and carries sperm. It feels like a smooth, firm lump above the testicle. Spermatoceles are almost always benign, meaning they are not cancerous and usually cause no harm.

Yes, spermatoceles are quite common. They are found in a significant number of adult men, especially during routine physical exams or ultrasounds done for other reasons.

Spermatoceles most often affect adult men, typically from middle age onward, but they can appear at any age. They are rare in children.

Symptoms

Common symptoms

• No symptoms at all — the cyst is found by accident.
• A painless, smooth lump above or behind the testicle.
• A feeling of heaviness or dull ache in the scrotum.
• The lump may feel like a third testicle, but it is separate from the testicle itself.

Symptoms in children

• Spermatoceles are uncommon in children, but if a child has a scrotal lump, it should always be checked by a doctor.
• In children, a similar lump is more likely to be a hydrocele, but any new lump needs professional assessment.

Symptoms in older adults

• In older adults, spermatoceles are often found during prostate or bladder exams.
• Symptoms are usually the same as in younger men — most often no symptoms at all.
• If the cyst grows larger, it can cause pressure or discomfort in the scrotum.

Causes

Main causes

• The exact cause is not always clear.
• It develops when a tube in the epididymis becomes blocked, allowing fluid to collect in a sac.
• It may be linked to a previous injury, infection, or inflammation of the epididymis (epididymitis).
• Sometimes it happens without any known reason.

Risk factors

• Being aged 30 to 50 or older
• A previous scrotal injury or surgery
• Past or current infection of the epididymis
• Congestion of sperm and fluid in the epididymis (for example, after a vasectomy)

When to see a doctor

See a doctor urgently if:

• Sudden severe pain or swelling in the scrotum
• A hard, painful, or rapidly growing lump
• Fever, nausea, or vomiting along with scrotal symptoms

Book a routine appointment if:

• Any lump in the scrotum, even if it does not hurt
• A feeling of heaviness or discomfort that persists
• Changes in the size of a known lump

Diagnosis

A doctor will examine your scrotum and testicles. They may shine a light through the lump (transillumination) — a fluid-filled cyst like a spermatocele usually lights up. They may also order an ultrasound, which uses sound waves to create an image of the scrotum and confirm whether the lump is a cyst or something else.

Tests that may be done

• Physical examination of the scrotum and testicles
• Transillumination (light test)
• Scrotal ultrasound (to confirm the diagnosis)
• Sometimes a urine test if an infection is suspected

What to expect at your appointment

The exam is quick and usually painless. You may be asked to stand and lie down. The ultrasound is a simple, non-invasive scan using a gel and a handheld device. You should know the results within a few days, and in most cases you will be reassured that no treatment is needed.

Treatment

Spermatoceles rarely require treatment. If the cyst is small and causes no symptoms, the best approach is usually to leave it alone and simply keep an eye on it. If it becomes large, painful, or bothersome, there are safe options to manage it.

Self-care at home

• Wear supportive underwear or a jockstrap to reduce pulling and discomfort.
• Apply a cold pack to the area for short periods to ease swelling (never apply ice directly to the skin).
• Avoid heavy lifting or straining if it causes pain.
• Rest and elevate the scrotum if there is swelling or ache.
• Ask your pharmacist about suitable pain relief — do not take any medicine without professional advice.

Medical treatments

If symptoms are troublesome, a doctor may suggest draining the cyst with a needle (aspiration) or injecting a substance to help it shrink. However, the fluid can return. The most reliable approach for persistent, painful cysts is a minor surgical procedure called spermatocelectomy, where the cyst is removed. This is done under local or general anaesthesia and is usually safe. Discuss the options, benefits, and risks with your doctor.

When is surgery considered?

Surgery may be considered if the spermatocele grows large, causes chronic pain or discomfort, or if there is any doubt about the diagnosis. Surgery is not an emergency, and it is your choice after talking with your healthcare team.

Living with this condition

For most people, a spermatocele does not affect daily life. You can continue all normal activities, including exercise, sports, and sexual activity. If the cyst is larger, you may prefer to wear supportive underwear during physical activity.

Lifestyle tips

• Regular self-checks of your testicles to notice changes.
• Use protective gear during contact sports to avoid injury.
• Maintain a healthy weight to reduce pressure on your groin.
• Bathe or shower regularly to keep the area clean.

Diet and exercise

No special diet is needed. Staying active and eating a balanced diet are always good for general health. If the cyst causes discomfort during high-impact exercise, try lower-impact activities or wear better support.

Mental health and emotional wellbeing

Finding a lump on your testicle can be worrying, or even frightening. It is normal to feel anxious. Remember that a spermatocele is benign and very common. If anxiety continues, talk to your doctor or a trusted counsellor — you do not have to manage these feelings alone.

Prevention

There is no sure way to prevent a spermatocele, because the cause is often unknown. You can reduce the risk of injury by protecting your groin and seek prompt treatment for any scrotal infections.

Screening programmes

There is no routine screening test for spermatoceles. A doctor may detect one during a physical exam. You can also do regular self-examinations to become familiar with your body and notice any changes early.

Complications

If left untreated

• A spermatocele is generally harmless and may not need any treatment.
• Occasionally it can slowly grow larger, causing more discomfort or heaviness.
• Rarely, it can become painful, or you may feel a dull ache after long periods standing.
• In very rare cases, the fluid can become infected, leading to swelling and pain.

Long-term outlook

The outlook is excellent. A spermatocele does not affect testosterone levels, does not cause cancer, and does not usually affect fertility. With simple monitoring and, if needed, minor treatment, almost all people manage well.

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