Hydrocele

Hydrocele is the medical name used to describe a collection of fluid around the testicle in the scrotum (the sac beneath the penis).

What causes a hydrocele?

During pregnancy, the testicles in boy babies actually grow inside the abdominal cavity, not in the scrotum. Four months before birth, a tunnel formed by the smooth lining of the intestinal cavity, pushes down into the scrotum. Between 1 and 2 months before birth, the testicle moves down through this tunnel to be anchored in the scrotum. The tunnel should close after the testicles move through it.

In some boys, the tunnel doesn't completely close. This can cause swelling because the fluid which cushions the intestines can drain into the scrotum. Sometimes the swelling can increase and decrease as a child strains or cries. If the tunnel is large enough to allow the intestines to move down toward the scrotum, the boy has a hernia. Hydroceles are more common in boys who are born prematurely.

If the hydrocele is small it is usually safe to watch it. Many of them will go away as the boy grows. If the hydrocele is large or if it is still present as a boy gets older it needs to be fixed.

How is a hydrocele treated?

The best treatment for a hydrocele is a surgery to close the tunnel draining into the scrotum. Even when we don't see a hydrocele on the opposite side, 60 out of 100 boys will have an open tunnel on both sides. For that reason we recommend checking both sides at the same time.

How is the surgery done?

An incision is made in the groin. The tunnel is found inside the abdomen and then tied off so that no more fluid can drain to the scrotum. The muscles are tightened to prevent a hernia. The incisions are closed with stitches that dissolve. No stitches have to be removed after surgery.

Is the surgery safe?

Yes! Almost all boys with a hydrocele can have their surgery as an outpatient. This means that the child comes in to the outpatient surgery center in the morning, has the surgery and is ready to go home by early afternoon. This surgery is performed under general anesthesia. Local anesthesia would be terrifying to a child and it also would make the surgery very difficult. Loyola has well-trained pediatric anesthesiologists who have had special training in the care of children. They use continuous oxygen, heart and blood pressure monitoring to make sure that the anesthesia is safe.

Are there any possible complications with the surgery?

As with any medical treatment there are some potential complications with hydrocelectomy. In most cases the standard surgery is 98% successful in closing the hydrocele and having the testicle stay in the proper position. Infection and significant bleeding are very rare. It is theoretically possible that the testicle or the tubes going to the testicle could be injured during the surgery. However, this is extremely unlikely.

Is there anything I should watch for?

If your child has a hernia it is possible that the intestines could become trapped and twisted in the tunnel. If this should happen your son would probably have swelling and discoloration in the groin and scrotum. It may turn blue or dark brown or red. He would probably be fussy and would not want to eat. He may vomit or have diarrhea and he may have a fever. This could be a strangled hernia, an emergency. If he has swelling in the groin with the color change and any of the other signs listed above call Dr. Hatch immediately through the hospital operator at 708/216-9000 or come to the emergency room.

Is there anything I can do to prepare my child for surgery?

Infants do very well with surgery. Children who are old enough to talk are sometimes anxious if they don't know what will happen to them. You can ease this fear by talking about the upcoming surgery. Many local libraries have books or video tapes about going to the hospital or doctor's office. We also have a video tape which can explain the Outpatient Surgery Center to children. Children are often fearful of an unfamiliar environment. It may help to bring a favorite toy or blanket on the day of surgery.

Like children, parents also are sometimes anxious about the unknown. Don't hesitate to ask questions. We want you to have all of the information you need about your child's care. It may help to write down questions as you think about them. Bring them with you to your child's appointment and we will be happy to answer them.


The information on the Loyola University Health System (LUHS) Web site is for educational purposes only. It is presented in summary form in order to impart general information relating to certain diseases, ailments, physical conditions and their treatments. The information provided through the LUHS Web site should not be used for diagnosing or treating a health problem or a disease, nor is it a substitute for professional care. Should you have any health-care related questions or suspect you have a health problem, you should consult your health care provider. See also Copyright and Disclaimer.