Gonadal vein

The gonadal veins are paired structures that drain the gonads in males and females. In males it is called the testicular vein and in females it is called the ovarian vein. The gonadal veins ascend with the gonadal arteries in the abdomen along the psoas muscle anterior to the ureters^{1, 2}.

Gross anatomy 

Ovarian veins

The right ovarian vein arises from the right ovarian plexus (which is continuous with the uterine plexus) and lies lateral to the right ureter. It ascends anterior to psoas and parallels the right ureter. It crosses the ureter anteromedially halfway between bifurcation of the IVC and the point in which it joins the anterolateral inferior vena cava (IVC). 

The left ovarian vein ascends similarly into the abdomen but drains into the left renal vein ^1-4.

Testicular veins

The venous circulation of the male gonads comprises two intrascrotal networks; a deep and superficial venous network. The deep network drains the testis, epididymis, and vas deferens. The superficial network drains the veins of the scrotum.

Veins of the testes and epididymis form the pampiniform plexus. which ascends to form four veins at the level of the superficial inguinal ring and a single testicular vein at the level of the deep inguinal ring. It ascends through the inguinal canal in the spermatic cord ^{3, 4}. 

The testicular vein ascends in the retroperitoneum on psoas major. Along its course there are variable communications with retroperitoneal veins, abdominal wall veins and renal capsular veins. The left testicular vein invariably drains into the left renal vein.  The The right testicular vein usually drains into IVC just below the renal vein, but sometimes drains into the right renal vein.

Variant anatomy

• the testicular veinduplication is often duplicatedcommon, more commonlyoften on the left (~13%) than on the right (~2%) ⁷

Radiographic appearance 

CT

• the ovarian veins are frequently used to identify the ovaries; they are useful landmarks particularly for determining the origin of a pelvic mass
• the ovarian vascular pedicle sign is present in 92% of ovarian masses; direct joining of an asymmetrically enlarged gonadal veins with a pelvic mass indicates that the ovary is the organ of origin ^{2, 5}
• the ovarian vein is best visualised at level of the origin of the inferior mesenteric artery where it is surrounded by retroperitoneal fat and in the pelvis medial to external iliac vessels ^{2, 5}
• testicular vein normally measures 1-3 mm in diameter ⁸

Related pathology 

• ovarian vein phlebolith 
• ovarian vein reflux and pelvic congestion syndrome
• ovarian vein thrombosis 
• ovarian vein stenosis and occlusion  
• varicocele