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Get the facts. And the help you need.


The male reproductive tract is responsible for the production, maturation, and transport of sperm. This tract is a complex and highly integrated entity. Sperm produced in the testicles are transported through the genital duct system and deposited in the urethra during ejaculation followed by emission.

Abnormalities within the male reproductive tract may present as a scrotal masse. Masses may have little or no health significance or may represent life-threatening illnesses. Therefore, it is necessary to follow a set course of action to determine the nature of the masse and the most appropriate treatment. For example, testicular cancer which can present as a scrotal mass is a source of great concern and uniformly requires prompt intervention. Other masses, such as varicoceles, may be benign or cause testicular growth retardation in adolescent boys or impair fertility in adults. Thus, it is important for a patient to seek prompt medical attention when he identifies a scrotal mass or any lump or bump while performing a testicular self examination. The following information will assist you when talking to a urologist about varicoceles.

What are varicoceles?

The spermatic cord is the structure that provides the blood supply to the testicle and contains the vas deferens which transports sperm from the testicle to the penis and urethra. The spermatic cord passes through the inguinal canal and continues into the scrotum. The pampiniform plexus is a group of interconnected veins, which drain the blood from the testicles and lies within the spermatic cord. The pampiniform plexus is believed to have an important functional role in maintaining testicular temperature in the appropriate range for sperm production. The pampiniform plexus cools blood in the testicular artery before it enters the testicles, helping to maintain an ideal testicular temperature, essential for optimal sperm production.

Varicoceles are abnormal enlargements (dilations) of the pampiniform plexus of veins within the scrotum. They are similar to varicose veins of the leg, and often form during puberty. They can become larger and thus more noticeable with time. Left-sided varicocoele are more common than right-sided varicocoele, likely due to anatomical differences between the two sides. Ten to fifteen percent of boys have a varicocoele. A fraction will develop testicular growth retardation during puberty.

What can cause varicoceles?

Several causes of varicoceles have been suggested. Incompetent or absent valves within the spermatic veins may lead to pooling of blood from sluggish or even backflow. Additionally, the acute angle at which the left spermatic vein enters the renal (kidney) vein may transmit the relatively high pressure to result in backflow manifested in enlargement of the scrotal veins. This explains why varicoceles are more common on the left side since the gonadal vein on the left side enters the renal vein. The right gonadal vein is not as long and does not join with the right venal vein. Rarely, enlarged lymph nodes or other abnormal masses in the retroperitoneum (the space behind the abdominal cavity) will block the flow of blood in the spermatic veins, leading to acute enlargement of scrotal veins. This phenomenon is rare and is usually associated with pain.

How common are varicoceles?

Varicoceles are present in an estimated 15 percent of all men. It is not know how many lead to infertility but approximately 40 percent of men undergoing evaluation for infertility are found to have a varicocoele and decrease sperm motility. There is no association other anomalies, race, geographic or ethnic origin.

What are the symptoms of varicoceles?

Most men diagnosed with a varicocele have no symptoms, but varicoceles are important for several reasons. Varicoceles are thought to cause infertility and testicular atrophy (shrinkage). Approximately 40 percent of cases of primary male infertility and 80 percent of cases of secondary male infertility are believed to be due to varicoceles. Varicoceles rarely cause pain. When pain is present, it can vary from a dull, heavy discomfort to a sharp pain. The associated symptoms may increase with sitting, standing or physical exertion - particularly if any one of these activities occurs over long periods of time. Symptoms often progress over the course of the day, and they are typically relieved when the patient lies on his back, allowing improved drainage of the veins of the pampiniform plexus.

How are varicoceles diagnosed?

Varicoceles can be discovered through self-examination or during routine physical examination. They may look or feel like a mass in the scrotum, and they have been described as having a "bag of worms" both because of their appearance and the way they feel. Physicians typically diagnose varicoceles with the patient in the standing position. The patient may be asked to take in a deep breath, hold it, and bear down while the physician feels the scrotum above the testicle. This technique, known as the Valsalva maneuver, assists the physician in detecting abnormal enlargement or increased fullness of the pampiniform plexus of veins. A physician may order a scrotal ultrasound test to help make the diagnosis, particularly if the physical examination is difficult or inconclusive. Radiographic hallmarks of varicoceles on scrotal ultrasonography are veins greater than three millimeters in size with reversal of blood flow within the veins of the pampiniform plexus during the Valsalva maneuver. In addition, the ultrasound study can provide testicular size measurements which are factored in the medical decision process in adolescents. However, routine radiographic screening for varicoceles in the absence of physical findings is not indicated.

What are the treatment options for varicoceles?

Treatment of varicoceles is an appropriate consideration in patients with infertility, pain or testicular atrophy. No medical therapies are available for either treatment or prevention; however analgesic agents may alleviate associated pain when present.

There are two main approaches to the treatment of a varicocele:

Surgical Repair: This approach involves a variety of specific techniques, but all involve ligation (obstructing) of the spermatic veins thus interrupting blood flow in the vessels of the pampiniform plexus. The surgical approaches include open surgical repairs performed through a single 1 inch incision with or without the use of optical magnification (e.g., magnifying glasses or loupes or an operating microscope). Laparoscopic varicocele repair which utilizes telescopes passed through the abdominal wall are advocated by some. The open procedures are performed under a variety of anesthetics, from local to general anesthesia, whereas the laparoscopic approach is uniformly performed under a general anesthetic agent. With the advent of smaller incisions, which avoid muscle transection, the open procedures are becoming closer to the laparoscopic techniques in both speed of recovery and postoperative pain. Complications resulting from either open or laparoscopic approaches are rare, but include varicocele persistence/recurrence, hydrocele formation and injury to the testicular artery leading to loss of the testis (fortunately, this is an extreme complication).

Percutaneous Embolization: This procedure is performed by radiologists using a special tube that is inserted into a vein in either the groin or neck. After radiographic visualization of the enlarged veins of the pampiniform plexus, coils or balloons are released to create an obstruction (blockage) in the veins. This obstruction then typically leads to interruption of blood flow within the pampiniform plexus vessels and disappearance of the varicocele. Percutaneous embolization is typically performed with intravenous sedation anesthesia and usually takes several hours to complete. Complications may include varicocele persistence/recurrence, coil migration and complications at the venous access site. This has not been widely employed in most centers.

What can be expected after treatment?

Recovery time after surgical repair is rapid. Pain is usually mild, and patients are asked to avoid strenuous activity for 10 to 14 days. Office work can typically be done one to two days after surgery. A follow-up visit with the urologist is scheduled. A follow-up semen analysis is obtained three to four months later if the procedure was performed to treat associated infertility. Open procedures performed with optical magnification have a low recurrence rate of approximately one percent.

Recovery time after embolization is also relatively short. Again, pain is typically mild, and patients are asked to avoid strenuous physical activity for seven to 10 days after the procedure. Patients may return to office work one to two days postoperatively. The recurrence rate with embolization is generally thought to be higher than that achievable with optical magnification. Nevertheless, there are circumstances when embolization may be preferable.

The impact of varicocele correction on fertility is not entirely clear. Some studies demonstrate improvement in fertility after varicocele repair, while other studies fail to document this change. Semen quality is improved in approximately 60 percent of infertile men undergoing correction of a varicocele, and this treatment should be considered in the context of other available treatment options as couples pursue therapy. In adolescents, where the main indication for surgery is testicular growth retardation, catch up growth occurs in over 90% of patients.

Frequently asked questions:

What will happen if I choose to observe my varicocele, rather than undergo treatment?
Failure to treat a varicocele may result in testicular atrophy and/or a decline in semen quality. This may lead to infertility. The varicocele may, over time, lead to permanent, irreversible testicular injury.

I have pain with my varicocele. What can I do to help alleviate the pain?
The use of adequate scrotal support (e.g., athletic supporter, briefs style underwear, etc.) can help the pain associated with a varicocele. Lying on your back facilitates varicocele drainage and often improves episodic discomfort as well. Use of analgesic agents (e.g., acetaminophen, ibuprofen, etc.) may be of benefit in treating the pain associated with a varicocele. Additionally, many patients obtain lasting relief of symptoms with varicocele correction through the above-mentioned techniques.

I am considering having my varicocele corrected for fertility reasons. How long will I have to wait to see improvement in semen parameters?
Semen analyses are typically obtained at three to four month intervals after the procedure. Improvement is often seen within six months, but may not be observed until one year postoperatively.

My adolescent son was recently diagnosed with a varicocele. Should this be corrected?
Indications for correction of a varicocele in an adolescent include disparity in testicular size exceeding 10% by volume. Additionally, correction is a consideration in patients with pain. Treatment of adolescents is highly individualized, and consultation with a urologist or a pediatric urologist to further discuss the appropriateness of treatment for a particular patient is highly recommended.

I am interested in fertility and have no symptoms. Should I have my varicocele repaired?
Generally, asymptomatic varicoceles are not repaired. Most physicians do not believe there are health consequences of untreated asymptomatic varicoceles.

Reviewed January 2011

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Varicoceles Glossary
  • abdominal: in the abdomen, the cavity of this part of the body containing the stomach, intestines and bladder.

  • acute: Acute often means urgent. An acute disease happens suddenly. It lasts a short time. Acute is the opposite of chronic, or long lasting.

  • analgesic: A drug intended to alleviate pain.

  • anesthesia: Loss of sensation in any part of the body induced by a numbing or paralyzing agent. Often used during surgery to put a person to sleep.

  • anesthetic: A substance that causes lack of feeling or awareness.

  • artery: Blood vessel that carries blood from the heart to various parts of the body.

  • atrophy: When an organ diminishes in size.

  • benign: Not malignant; not cancerous.

  • cancer: An abnormal growth that can invade nearby structures and spread to other parts of the body and may be a threat to life.

  • cutaneous: Relating to the skin.

  • diagnosis: The process by which a doctor determines what disease or condition a patient has by studying the patient's symptoms and medical history, and analyzing any tests performed (e.g., blood tets, urine tests, brain scans, etc.).

  • dilation: The stretching or enlargement of a hollow organ or body cavity.

  • ejaculation: Release of semen from the penis during sexual climax (orgasm).

  • embolization: The surgical introduction of various substances into the circulatory system to obstruct specific blood vessels.

  • emission: The delivery of sperm and seminal vesicle secretions through the prostate.

  • fertile: Able to produce offspring.

  • fertility: The ability to conceive and have children.

  • gene: The basic unit capable of transmitting characteristics from one generation to the next.

  • general anesthesia: Person is put to sleep with muscle relaxation and no pain sensation over the entire body.

  • genital duct system: Passages within various reproductive organs.

  • gonad: The organ that forms the reproductive cells. In females, this is the ovary. In males, it is the testicles.

  • groin: The area where the upper thigh meets the lower abdomen.

  • hydrocele: A painless swelling of the scrotum caused by collection of fluid around the testicle.

  • incision: Surgical cut for entering the body to perform an operation.

  • infertile: Physically incapable of conceiving children.

  • infertility: The diminished ability or the inability to conceive and have offspring.

  • inguinal: Located in or affecting the groin.

  • inguinal canal: A space in the groin.

  • intravenous: Also referred to as IV. Existing or occurring inside a vein.

  • intravenous sedation: Sedatives administered directly into the veins.

  • ions: Electrically charged atoms.

  • kidney: One of two bean-shaped organs that filter wastes from the blood and discharge these waste products in urine. The kidneys are located on either side at the level of the 12th ribs toward the back. The kidneys send urine to the bladder through tubes called ureters.

  • laparoscopic: Using an instrument in the shape of a tube that is inserted through the abdominal wall to give an examining doctor a view of the internal organs.

  • lymph: Fluid containing white cells. It can transport bacteria, viruses and cancer cells.

  • lymph nodes: Small rounded masses of tissue distributed along the lymphatic system most prominently in the armpit, neck and groin areas. Lymph nodes produce special cells that help fight off foreign agents invading the body. Lymph nodes also act as traps for infectious agents.

  • male infertility: Diminished or absent capacity to produce offspring due to absence or deficiency of spermatozoa in the semen, or failure of formation of spermatozoa; the term does not denote complete inability to produce offspring as does sterility.

  • obstruction: something that obstructs, blocks, or closes up with an obstacle

  • penis: The male organ used for urination and sex.

  • peritoneum: Strong, smooth, colorless membrane that lines the walls of the abdomen and covers numerous body organs including the bladder.

  • postoperative: Occurring after a surgical operation.

  • radiographic: X-ray.

  • radiologist: Doctor specializing in the interpretation of X-rays and other scanning techniques for the diagnosis of disorders.

  • renal: Pertaining to the kidneys.

  • renal vein: Short, thick vein which returns blood from the kidneys to the vena cava.

  • retroperitoneum: Behind abdominal lining.

  • scrotal: Relating to the scrotum, the sac of tissue that hangs below the penis and contains the testicles.

  • scrotal: Relating to the scrotum, the sac of tissue that hangs below the penis and contains the testicles.

  • scrotum: Also referred to as the scrotal sac. The sac of tissue that hangs below the penis and contains the testicles.

  • sedation: State of calm relaxation induced in one or more body systems by administration of medical agents (sedatives).

  • semen: The thick whitish fluid, produced by glands of the male reproductive system, that carries the sperm (reproductive cells) through the penis during ejaculation.

  • semen: Also known as seminal fluid or ejaculate fluid. Thick, whitish fluid produced by glands of the male reproductive system, that carries the sperm (reproductive cells) through the penis during ejaculation.

  • semen analysis: A laboratory study of semen to determine the concentration, shape and motility of sperm.

  • sperm: Also referred to as spermatozoa. Male germ cells (gametes or reproductive cells) that are produced by the testicles and that are capable of fertilizing the female partner's eggs. Cells resemble tadpoles if seen by the naked eye.

  • spermatic cord: A cord by which a testis is suspended in the scrotum.

  • symptomatic: Having to do with a symptom or symptoms that arise from and accompany a particular disease or disorder and serves as an indication of it.

  • testicle: Also known as testis. Either of the paired, egg-shaped glands contained in a pouch (scrotum) below the penis. They produce sperm and the male hormone testosterone.

  • testicular: Relating to the testicle (testis).

  • testicular cancer: Cancer of the testis.

  • testis: Also known as testicle. Either of the paired, egg-shaped glands contained in a pouch (scrotum) below the penis. They produce sperm and the male hormone testosterone.

  • ultrasonography: A test in which sound waves are bounced off body tissue, and the echos are converted into a picture, for the purpose of medical examination or diagnosis, that are viewed on a monitor.

  • ultrasound: Also referred to as a sonogram. A technique that bounces painless sound waves off organs to create an image of their structure to detect abnormalities.

  • urethra: A tube that carries urine from the bladder to the outside of the body. In males, the urethra serves as the channel through which semen is ejaculated and it extends from the bladder to the tip of the penis. In females, the urethra is much shorter than in males.

  • urge: Strong desire to urinate.

  • urologist: A doctor who specializes in diseases of the male and female urinary systems and the male reproductive system. Click here to learn more about urologists. (Download the free Acrobat reader.)

  • varicoceles: Dilated varicose veins in the scrotum that drain the testis and can impair the process of formation of sperm.

  • vas: Also referred to as vas deferens. The cordlike structure that carries sperm from the testicle to the urethra.

  • vas deferens: Also referred to as vas. The cordlike structure that carries sperm from the testicle to the ejaculatory duct, whicn in turn carries it to the urethra.

  • vein: Blood vessel that drains blood away from an organ or tissue.

  • void: To urinate, empty the bladder.

Varicoceles Anatomical Drawings

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