Condition category
Urological and Genital Diseases
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
Varicoceles are dilated veins around the scrotum and are commonly associated with infertility in men. Current international guidelines suggest that boys with varicoceles should undergo surgery only if their testicle is not growing properly or if the varicocele is causing pain. However, following these guidelines can result in reduced fertility in adult life, as has been shown in a recent paper. At the moment the usual care for boys who have a varicocele and normal size of testicles is not to perform surgery. We would like to find out if early varicocele surgery is better than waiting until the testicle stops growing.

Who can participate?
The study is for boys aged 14 to 17 years old with a varicocele where the blood flow in the varicocele is spontaneous and the size of each testicle is symmetrical. Patients must also not have had groin surgery, an inflamed epididymis and or problems with hormone levels as these can affect fertility and may affect the results of the study.

What does the study involve?
Patients with a varicocele and normal sized testicles, will be randomly put into groups. The first group will follow the current guidelines and receive conservative treatment (no surgery). The second group will receive early surgery.
Following parents’ permission, the GP will be informed of the boy’s participation in the study.
Each patient will be asked to produce a semen sample at the start and end of the study. This is essential to allow us to find out if surgery affects semen quality. This will also pick up problems with fertility early and allow plans to be made in advance.
Varicocele surgery will be done under a general anaesthetic and involves tying off the dilated veins. It can be done as a day-case. The exact operation depends on which veins are leaking on the Doppler ultrasound scan. It is done using a key-hole surgery or with an incision in the groin.

What are the possible benefits and risks of participating?
This study has the potential to help us find out if early surgery in children with varicocele improves fertility. Participants will be carefully monitored for their condition by a team of specialists in this field until they are18 years of age. Sperm banking will be offered for free.
If the patient does not get allocated early surgery, he will be regularly reviewed in our clinic where we will check on the growth of the testicle. This is current standard management for varicoceles, which are not painful or do not affect the size of the testicle. If either of these conditions develop or the initial semen analysis shows a problem with the sperm quality, he will be treated with an operation as current guidelines recommend.
Generally the surgery is very safe and effective. The specific risks of varicocele surgery include: wound infection and bleeding (rare), some fluid can develop around the testicle (10-15% although the majority go away spontaneously) and there will be a scar.

Where is the study run from?
The study is run by Mr Keene (Registrar Paediatric Surgery) and Mr Cervellione (Consultant Paediatric Urologist) based at the Royal Manchester Children’s Hospital.

When is the study starting and how long is it expected to run for?
The study is expected to start in April 2011 and to last four years.

Who is funding the study?
The Central Manchester Foundation NHS Trust Urological Charitable Research Fund

Who is the main contact?
Mr David Keene

Trial website

Contact information



Primary contact

Mr David Keene


Contact details

Department of Paediatric Urology
Royal Manchester Children's Hospital
Oxford Road
M13 9WL
United Kingdom

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Open randomised control study to assess the impact on fertility of early surgery in adolescents with varicocele



Study hypothesis

Current international urology guidelines for adolescents state that varicocele surgery should be undertaken if there is growth arrest of the testicle or if the varicocele is painful.

If these guidelines are followed a recent study shows that at 18 years of age many of these men have poor semen quality.

Our study aims to investigate if earlier surgery, before growth arrest occurs, improves fertility. Some studies have been done in adults showing that repair of varicoceles can improve semen analysis, however no similar work has been done in adolescents. Testicular ultrasound has been shown to be an accurate way to assess testicular volume. In our study we plan to use ultrasound to monitor testicular growth. Unusual shaped sperms, poor movement and lower sperm numbers are the commonest findings on semen analysis in men with varicocele related infertility. The trial aims to see if some of these abnormalities are prevented by early surgery.

Our hypothesis: If varicocele surgery is performed in adolescents before testicular growth is affected, fertility will be preserved.

Ethics approval

Tameside and Glossop Regional Ethics Committee approved on 17 March 2009, ref 09/H1013/15

Study design

Randomised controlled study

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Patient information sheet can be found at




All patients referred with a varicocele, will be examined by a consultant paediatric urologist to assess the pubertal stage and the severity of the varicocele.

A doppler ultrasound will be performed during spontaneous breathing and under Valsalva manoevre to assess the severity of reflux (flow of blood in the dilated veins), and to identify which veins this is occuring in. Testicular ultrasound using electronic calipers will be used to measure testicular size and testicular volume will be estimated.

Patients with grade 2 and 3 clinical varicoceles with continuous venous reflux on doppler ultrasound without evidence significant testicular growth arrest will be candidates for the study. Testicular growth arrest is defined as testicular volume at least 20% smaller than the contralateral testicle.

Surgery or non surgical treatment will be randomly allocated to each patient. This will be done by an independent third party using a computer generated spreadsheet. The exact operation (either groin surgery or a keyhole approach) will be determined by the findings on the doppler ultrasound scan. If the reflux occurs only in the testicular veins then key hole surgery would be done, otherwise a groin approach would be used.

In both groups follow up will be done every 6 months with clinical examination, testicular ultrasound and doppler. The patient's symptoms, grade of varicocele and testicular volumes will be recorded. In the surgical group postop complications will also be recorded.

Any patient in the conservative group who develops testicular growth arrest will be treated surgically as recommended by the current guidelines. They will remain in the conservative group for analysis on an intention to treat basis.

All patients will be followed up post study and referred to an adult urologist if appropriate.

Intervention type



Not Applicable

Drug names

Primary outcome measure

To compare the trend in semen analysis between the two groups:
1. Percentage normal semen quality (according to the WHO criteria)
2. Percentage of motile sperm
3. Mean concentration of sperm (million per millilitre)

Secondary outcome measures

Difference in testicular volume (mls) between the affected side (with the varicocele) and the contralateral testis. The testicular sizes will be measured every 6 months.

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Between ages of 14-17 years at recruitment to study
2. Have a clinically detectable varicocele
3. High grade reflux on Doppler ultrasound (grade 2 or 3)

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Children younger than 14 years of age or older than 17 years at time of recruitment to study
2. Testicular growth arrest
3. Previous inguinal surgery
4. Orchitis
5. Epididymo-orchitis
6. Testicular torsion
7. Endocrinological disorders

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Department of Paediatric Urology
M13 9WL
United Kingdom

Sponsor information


Central Manchester Foundation NHS Trust (UK)

Sponsor details

Trust Headquarters
Cobbett House
Manchester Royal Infirmary
Oxford Road
M13 9WL
United Kingdom

Sponsor type

Hospital/treatment centre



Funder type


Funder name

Central Manchester Foundation NHS Trust (UK) - Urological Charitable Research Fund (ref: 629826)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes

17/08/2018: The overall trial end date has been changed from 01/05/2017 to 01/01/2022.