Varicocele Embolisation

What a varicocele embolisation does

A varicocele is a tangle of swollen veins above the testicle, caused by valves in the testicular vein failing so that blood flows backwards and pools. That pooling raises the temperature around the testicle and is associated with impaired sperm production, a persistent dragging ache, and in some men reduced testosterone.

Surgery treats this from the outside: an incision, and the faulty veins tied off. Embolisation treats it from the inside. A needle puncture is made in a vein — usually at the top of the right thigh, sometimes in the neck — and a catheter thinner than a piece of spaghetti is steered up through the vein system to the testicular vein under X-ray guidance. Contrast dye confirms exactly which veins are refluxing. The radiologist then blocks the vein from within, using small metal coils, a sclerosant that scars the vein closed, or a combination of the two. Blood immediately reroutes through healthy veins; the blocked vein is not needed.

The puncture site is closed with pressure and a dressing. There are no stitches to remove, no scrotal wound, and nothing that can be seen afterwards.

How well it works

In a fifteen-year series from two tertiary centres covering 225 patients, embolisation was technically successful — the vein reached and successfully blocked — in 96% of cases, with clinical success in 94% and a complication rate of 1.78%, none of them major.

That series produced one finding worth knowing before you travel. When patients were contacted afterwards, a quarter believed their varicocele had come back. When those men were scanned, the true, ultrasound-confirmed recurrence rate was 6.25%. Most men who thought the procedure had failed were wrong. Residual fullness in the scrotum is common and does not mean the vein is refluxing again — which is exactly why we insist any proposal includes a defined route back for a follow-up scan rather than leaving you to interpret your own scrotum from three thousand kilometres away.

Technical success rates in the wider literature vary with how the operator defines them, ranging from the high eighties to essentially 100% in selected series. The most common reason for failure is not skill but anatomy: sometimes the testicular vein cannot be catheterised, particularly on the right, and the procedure has to be abandoned. This is uncommon, but it is a possibility your consent conversation should cover.

Embolisation or surgery? An honest comparison

We publish a varicocelectomy page as well, and we are not going to pretend the two procedures are interchangeable just because we offer both.

For a man whose primary goal is fertility, microsurgical subinguinal varicocelectomy remains the reference standard. Network meta-analyses consistently rank it first for pregnancy rates and lowest for recurrence, with recurrence rates under 4% in good series. A systematic review comparing sclero-embolisation with surgical ligation across thirty studies found a statistically higher recurrence rate after embolisation. If you are choosing purely on the strength of the fertility evidence, microsurgery is the better-supported option, and any site telling you otherwise is either behind the literature or selling you something.

That does not make embolisation the wrong choice. A prospective head-to-head study comparing subinguinal microsurgical ligation with percutaneous embolisation in infertile men found no significant difference in sperm quality, pregnancy rate or overall satisfaction between the two, with an overall spontaneous pregnancy rate of 35.5% at a median four years of follow-up. Patients who had embolisation recovered faster and reported less post-procedure pain.

So the honest summary is this: surgery has the stronger fertility evidence base and the lower recurrence rate; embolisation is meaningfully gentler and, in direct comparison, produced comparable results. Where the two diverge most is not in outcome but in what you are willing to undergo to get it.

Embolisation moves ahead of surgery when:

• The varicocele has recurred after previous surgery, where scarring makes a repeat operation harder and embolisation can map and block the collateral veins that caused the recurrence.

• Both sides need treating, which embolisation can do through a single puncture in one sitting.

• General or spinal anaesthesia is undesirable or risky for you.

• Your dominant complaint is pain rather than infertility.

• Recovery time genuinely matters — a self-employed patient who cannot afford three weeks of restricted activity is making a rational choice, not a squeamish one.

Surgery moves ahead when:

• Fertility is the sole objective, the semen parameters are significantly abnormal, and you want the option with the strongest evidence behind it.

• Radiation exposure is a concern you would rather avoid altogether.

• Previous embolisation has failed.

If you tell us your situation, we will tell you which of these two your case sits closer to — including when the answer is that neither procedure is likely to help you enough to be worth the flight.

The radiation question

Embolisation is guided by live X-ray, and the field is close to the testicles in men who are usually trying to conceive. This deserves a straight answer rather than a footnote.

Fluoroscopy times in published series typically run around twenty minutes, and reported doses are low. Interventional radiologists working in this area are acutely aware that their patients are young, healthy and fertile, and dose reduction is an explicit priority in the literature. There is no evidence that varicocele embolisation impairs subsequent fertility — the head-to-head comparisons show sperm parameters improving, not declining.

But "low" is not "none", and surgery involves no radiation at all. If that trade-off matters to you, it is a legitimate reason to choose varicocelectomy, and we would rather you weighed it now than discovered it in a forum afterwards.

Who performs it, and why that changes what we verify

This is the one procedure on our site not performed by an andrology surgeon. Embolisation is done by an interventional radiologist, and the operator's experience with gonadal vein anatomy — which is highly variable, especially on the right — is the main determinant of technical success.

Our verification for this procedure therefore runs on two tracks: the interventional radiologist who performs the embolisation, checked against their medical registration in the same way as every surgeon on this site, and the andrologist who assessed you and will interpret your follow-up semen analyses. A varicocele should not be treated by someone who never examined it. If a clinic offers you embolisation without an andrological assessment first, that is a reason to walk away, and we will not put that clinic in your proposal.

What happens on the day

You attend fasted, though this is a lighter fast than for a general anaesthetic. Local anaesthetic is injected at the puncture site, usually at the top of the right thigh, and sedation is given to keep you comfortable and still. You are awake but drowsy throughout.

The catheter is advanced under X-ray guidance and contrast is injected to map the refluxing veins. Coils, sclerosant or both are deployed. You may feel a brief cramping ache in the groin or flank when the sclerosant goes in; this is expected and short-lived. The catheter is removed and pressure held over the puncture site.

You lie flat for two to four hours afterwards to let the vein seal, then you go home. There is no wound to dress beyond a small plaster.