Spermatocele

A spermatocele is a small, usually painless cyst that forms on the epididymis, which is the tube that stores and transports sperm behind each testicle.

Causes and Risk Factors

The exact cause of a spermatocele is often unknown, but it may be related to a blockage in the epididymis or a problem with the way sperm is transported. Factors that may increase the risk of developing a spermatocele include:

  • Age: Spermatoceles are more common in men over 40 years old
  • Trauma to the testicles or epididymis
  • Inflammation or infection of the epididymis (epididymitis)
  • Blockage of the epididymis or vas deferens

Symptoms

A spermatocele may not cause any symptoms, but some men may experience:

  • A small, painless lump on the epididymis behind the testicle
  • Discomfort or pain in the testicle or epididymis
  • Abnormal semen analysis (e.g., low sperm count or motility)

Diagnosis

A spermatocele is typically diagnosed through a physical exam and medical history. The doctor may also perform:

  • Ultrasound: to confirm the presence of a cyst and rule out other conditions, such as testicular cancer
  • Semen analysis: to evaluate sperm quality and quantity

Treatment

Treatment for a spermatocele usually involves:

  • Watchful waiting: monitoring the cyst for changes in size or symptoms
  • Surgical removal: if the cyst is large, painful, or causing fertility problems
  • Sperm aspiration: removing sperm from the cyst to use for assisted reproductive techniques (e.g., in vitro fertilization)

Complications

If left untreated, a spermatocele may cause:

  • Fertility problems: due to blockage of sperm transport or abnormal semen quality
  • Chronic pain or discomfort: if the cyst becomes large or inflamed
  • Infection: if bacteria enter the cyst and cause an infection

Prevention

There is no sure way to prevent a spermatocele, but maintaining good testicular health through:

  • Regular self-exams: to detect any abnormalities or changes in the testicles
  • Safe sex practices: to reduce the risk of sexually transmitted infections (STIs) that can cause epididymitis
  • Avoiding trauma to the testicles: by wearing protective gear during sports and avoiding heavy lifting or straining

Frequently Asked Questions (FAQs)

What is a spermatocele?
A spermatocele is a small, usually painless cyst that forms in the epididymis, near the testicle.

What causes a spermatocele?
The exact cause of a spermatocele is often unclear, but it may be related to a blockage or injury in the epididymis.

What are the symptoms of a spermatocele?
Symptoms may include a small, palpable lump or swelling near the testicle, and possibly mild discomfort or pain.

How is a spermatocele diagnosed?
Diagnosis typically involves a physical exam and possibly ultrasound imaging to confirm the presence of a cyst.

Can a spermatocele affect fertility?
It is possible that a large spermatocele may affect fertility, but this is not always the case and more research is needed.

How is a spermatocele treated?
Treatment options may include watchful waiting, surgical removal of the cyst, or aspiration of the fluid.

Can a spermatocele be prevented?
It is unclear whether spermatoceles can be prevented, as the causes are not fully understood.

Are spermatoceles common?
Spermatoceles are relatively rare and typically occur in men between 20 and 50 years old.

Can a spermatocele rupture or become infected?
It is possible for a spermatocele to rupture or become infected, which may require medical attention.

Does a spermatocele increase the risk of other health problems?
The relationship between spermatoceles and other health problems is not fully understood and more research is needed.

Article last updated on: 18th October 2025.
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