Radiological anatomy of the internal spermatic vein(s) in 200 retrograde venograms.

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<jats:p>The radiological anatomy of the internal spermatic vein(s) was studied in 200 retrograde venograms performed as part of presurgical evaluation in patients with variocele. A large range of anatomical variations was found at the left side. Bilateral reflux occurs in one out of four patients with unilateral varicocele at palpation. Bilateral treatment is therefore necessary in as much as one fourth of cases with ‘unilateral’ left side varicocele. In right side varicocele the spermatic vein generally enters the right renal vein. Varicocele ligation should be performed near the internal inguinal ring in order to interrupt reflux most securely. Non‐surgical treatment of varicocele by means of sclerosis or embolization of the internal spermatic vein, will remain restricted to those cases in which reflux passes through only one spermatic vein. Insufficient knowledge of the anatomy of the internal spermatic vein(s), and the resulting incomplete interruption of reflux in this (or these) vessel(s) may be the cause of poor treatment results reported by some authors.</jats:p>

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