Varicocele Embolization

A varicocele is an abnormal dilation and tortuosity of the veins within the scrotum, specifically the pampiniform plexus, that drains blood from the testicle. It occurs when valves within the internal spermatic vein fail, allowing blood to reflux and pool — essentially a varicose vein of the scrotum. Varicoceles occur in approximately 15% of all men and up to 35–40% of men evaluated for infertility, making it the most commonly identified and surgically correctable cause of male infertility. They occur on the left side in roughly 90% of cases due to the anatomic angle at which the left internal spermatic vein drains into the left renal vein, creating higher pressure than the right side. Symptoms range from none at all (most varicoceles are asymptomatic and found incidentally) to a dull, aching, or dragging scrotal pain that worsens with standing or physical activity and improves when lying down.

Varicoceles raise the local temperature within the scrotum (normally several degrees cooler than core body temperature, which is essential for healthy sperm production) and increase oxidative stress and venous pressure within the testicle. Over time, this can impair sperm production, motility, and morphology, and in some men contributes to progressive testicular atrophy. Approximately 35–40% of men presenting for infertility evaluation are found to have a varicocele, and treating clinically significant varicoceles has been shown in multiple studies to improve semen parameters and increase natural pregnancy rates in couples struggling with male-factor infertility.

Surgical varicocelectomy (open, laparoscopic, or microsurgical) involves a groin or scrotal incision to directly ligate the dilated veins, performed under general or regional anesthesia, with a recovery period of 1–2 weeks and small risks of hydrocele formation, testicular artery injury, and wound infection. Varicocele embolization achieves the same goal — eliminating reflux into the affected veins — via a catheter inserted through a vein in the neck or groin, with no incision near the testicle at all. Multiple comparative studies show equivalent success rates between embolization and microsurgical repair (both 90%+ for resolving the varicocele), with embolization offering faster recovery, no general anesthesia, and a lower rate of hydrocele formation. Embolization is an excellent first-line option and is also the preferred approach for varicoceles that recur after a prior surgical repair.

Candidates include men with a symptomatic varicocele causing chronic scrotal pain or discomfort, men with infertility and an abnormal semen analysis in the setting of a palpable or imaging-confirmed varicocele, adolescents with a varicocele and demonstrated testicular growth arrest or asymmetry, and men whose varicocele has recurred after prior surgical repair (embolization is particularly well-suited here, as it can access the vein from above the surgical site). Men with an asymptomatic, small varicocele and normal fertility are generally not advised to pursue treatment, as intervention is reserved for those with symptoms, fertility concerns, or testicular growth/function issues.

The procedure is performed under local anesthesia with mild sedation if desired. Venous access is obtained — most commonly through the right internal jugular vein in the neck, though a femoral or basilic vein approach can also be used. A catheter is guided under fluoroscopy down into the renal vein and then selectively into the internal spermatic vein on the affected side. Venography confirms the diagnosis by showing reflux of contrast into the dilated pampiniform plexus. Dr. Chahal then deploys a series of embolic coils and/or a sclerosing agent along the length of the vein, working from the lowest point upward, to permanently close it and eliminate the abnormal reflux. The procedure typically takes 30–60 minutes, and most patients go home within an hour of completion with only a small bandage at the neck or groin.

Technical success — defined as complete occlusion of the refluxing vein — is achieved in 90–95% of cases in experienced hands. Among men treated for pain, approximately 85% report significant or complete resolution of scrotal discomfort within weeks to a few months. Among men treated for infertility, studies show improvement in semen parameters (concentration, motility, and morphology) in 60–80% of men at 3–6 months post-procedure (sperm takes about 3 months to fully regenerate, so semen analysis is typically repeated at that interval), with natural pregnancy rates improving meaningfully in couples whose only identified infertility factor was the varicocele.

Recovery from varicocele embolization is fast and comfortable. Most men experience only mild groin, flank, or neck soreness at the access site for a day or two, managed easily with over-the-counter pain medication. There are no scrotal incisions, sutures, or wound care required. Most patients return to desk work the next day and resume full physical activity, including exercise, within 3–5 days. Complications are uncommon (under 2%) and may include access-site bruising, transient flank discomfort from coil placement in the renal vein area, or — rarely — coil migration, which is minimized with careful technique and appropriately sized devices. Unlike surgery, there is no risk of injury to the testicular artery or lymphatics, making embolization particularly attractive for fertility-focused patients.

Recurrence after embolization is uncommon, occurring in roughly 5–10% of cases, usually due to an unidentified collateral vein that continues to feed the varicocele. This recurrence rate is comparable to, or slightly lower than, recurrence after surgical repair. If recurrence does occur, repeat embolization is generally straightforward, as the venous roadmap from the original procedure helps identify any missed collateral pathways.

Yes. Varicocele embolization has established CPT codes and is covered by Medicare and the large majority of commercial insurance plans when medical necessity is documented — typically symptomatic pain or an infertility evaluation showing a clinically significant varicocele. Our team handles prior authorization on your behalf and will confirm coverage and any expected costs before your procedure is scheduled.