精索靜脈曲張為男性不孕症錠可以手術治療的原因中最常見者。它通常發生於年輕成人，而且絕大多數為左側。所以新近發生於年老患者的精索靜脈曲張或發生於任何年齡的右側精索靜脈曲張，應考慮有腫瘤栓塞於腎靜脈或下腔靜脈之可能。腎臟細胞癌具有侵犯靜脈系統，導致急性精索靜脈曲張之潛能。我們回顧了本院過去五年內，曾診斷且治療73例男性萬臟細胞癌患皷，共有四位(5..9%)最初是因為精索靜脈曲張而到泌尿科求診。其中有三位左側，一位右側。這些病患術阢不須要增加腹壓，就有持續性(無論立姿或平躺)精索靜脈曲張。腎臟細胞癌經超音波，電腦斷層，或核磁共振造影診斷後。腎臟根除術為標準治療。術後精索靜脈曲張皆迅速消失，腫塊效應導致壓迫睪丸靜靂是一較可能之機轉。吾人分析腎臟細胞癌和精索靜脈曲張的年齡分佈，藉以探討一臨床實用之臨界點，以利日後之診斷與治療。

Varicocele is the most common surgically correctable cause of infertility. It mostly affects left side of young adult. The new onset of symptomatic varicocele in elder patient, or on right side only in patient at any age, should be considered as possible evidence of tumor thrombi in renal vein or inferior vena cava. Renal cell carcinoma (RCC) is potential to involve venous sys-tem and to result in acute varicocele. We reviewed 73 male patients of RCC who had been diag-nosed and treated at our hospital in the past 5 years. There were 4 (5.9%) cases. 3 in left and 1 in right, who initially called at genitourinary department for the symptoms of varicocele. They all had significant dilatation of pampiniform plexus without Valsalva maneuver in both supine and standing positions. Ipsilateral Rcc was discovered by ultrasound, computerized tomography, or magnetic resonance imaging. Radical nephrectomy was performed as standard procedure to all patients and the varicocele resolved immediately after surgery. Mass effect resulting in external compression of the testicular vein was considered a possible mechanism. The age-associated in-cidence of varicocele and RCC is discussed for to identify a critical point in practical evaluation. (J Urol R.O.C., 8:142-147,1997)