Varicocele: a bilateral disease.

OBJECTIVE: To evaluate the prevalence of varicocele in the left and right spermatic veins in infertile men by several methods of examination.

DESIGN: Prospective study.

SETTING: Andrology unit of a department of obstetrics and gynecology, and interventional radiology unit of the radiology department at a tertiary care facility.

PATIENT(S): Two hundred eighty-six infertile men evaluated for varicocele.

INTERVENTION(S): Patients underwent evaluation for infertility. Physical examination was followed by contact thermography, Doppler sonography, and venography of both testes.

MAIN OUTCOME MEASURE(S): We measured the prevalence of varicocele in the left and right spermatic veins in infertile men, and the response of semen parameters after embolization of internal spermatic vein.

RESULT(S): Varicocele was detected by one of the noninvasive methods and confirmed by venography in 255 patients (89.2%): the left site in 45 (17.6%), the right side in 4 (1.5%), and bilaterally in 206 (80.8%). All patients were treated by embolization. Mean sperm concentration increased from 6.12 +/- 1.02 to 21.3 +/- 1.69 million/mL; mean sperm motility from 16.81 +/- 1.51 to 35.90 +/- 1.41%; and mean sperm morphology from 9.75 +/- 0.85 to 16.92 +/- 1.17%. Pregnancy rate was 43.5%.

CONCLUSION(S): The present study finds that what was traditionally considered a predominantly unilateral anatomical abnormality apparently has a strikingly high bilateral prevalence (80.7%). This may suggest that we should consider varicocele a bilateral disease. The second finding is the high rate of varicocele detected by venography, thermography, and sonography when compared with physical examination results. Our study may have important implications for treatment, indicating that patients with clinical evidence of unilateral left varicocele should be carefully evaluated for bilateral varicocele.