Ovarian vein syndrome

Ovarian vein syndrome
Relation of artery to ureter

In medicine, ovarian vein syndrome is a rare (possibly not uncommon, certainly under-diagnosed) condition in which a dilated ovarian vein compresses the ureter (the tube that brings the urine from the kidney to the bladder). This causes chronic or colicky abdominal pain, back pain and/or pelvic pain. The pain can worsen on lying down or between ovulation and menstruation.[1][2] There can also be an increased tendency towards urinary tract infection or pyelonephritis (kidney infection). The right ovarian vein is most commonly involved, although the disease can be left-sided or affect both sides. It is currently classified as a form of pelvic congestion syndrome.



Since it is a rare disease, it remains a diagnosis of exclusion of other conditions with similar symptoms. The diagnosis is supported by the results of imaging studies such as computed tomography or magnetic resonance imaging, ultrasound of the abdomen (with or without doppler imaging) or intravenous urography.

Specialist vascular ultrasonographers should routinely look for left ovarian vein reflux in patients with lower linmb varices especially if not associated with long or short saphenous reflux. The clinical pattern of varices differs between the two types of lower limb varices. Ct scanning is used to exclude abdominal or pelvic pathology. CT-Angiography/Venography can often demonstrate left ovarian vein reflux and image an enlarger left ovarian vein but is less sensitive and much more expensive that duplex Doppler ultrasound examination. Ultrasound required that the ultrasonographer be experienced in venous vascular ultrasound and so is not always readily available. A second specialist ultrasound exam remains preferable to a CT scan.

As a wide range of pelvic and abdominal pathology can cause symptoms consistent with those symptoms due to left ovarian vein relux. Prior to embolisation of the left ovarian vein, a careful search for such diagnoses is essential. Consultation with general surgeons, gynaecologists, and possibly CT scanning should always be considered.


Treatment consists of painkillers and surgical ablation of the dilated vein. This can be accomplished with open abdominal surgery (laparotomy) or keyhole surgery (laparoscopy).[3] Recently, the first robot-assisted surgery was described.[4]

Another approach to treatment involves catheter-based embolisation,[5] often preceded by phlebography to visualise the vein on X-ray fluoroscopy.[2][6]

Ovarian vein coil embolisation is an effective and safe treatment for pelvic congestion syndrome and lower limb varices of pelvic origin. many patient with lower limb varices of pelvic origin respond to local treatment i.e. ultrasound guided sclerotherapy. In those cases, ovarian vein coil embolisation should be considered second line treatment to be used if veins recur in a short time period i.e. 1–3 years. This approach allows further pregnancies to proceed if desired. Coil embolisation is not appropriate if a future pregnancy is possible. This treatment has largely superseded operative options.

Coil embolisation requires exclusion of other pelvic pathology, expertise in endovascular surgery, correct placement of appropriate sized coils in the pelvis and also in the upper left ovarian vein, careful pre- and post-procedure specialist vascular ultrasound imaging, a full discussion of the procedure with the patient i.e. informed consent. Complication such as coil migration are rare but reported. Their sequelae are usually minor.

Disease mechanism

Normally, the ovarian vein crosses over the ureter at the level of the fourth or fifth lumbar vertebral bone. The ureter itself courses over the external iliac artery and vein.[7] Thus, these vessels can impinge on the ureter causing obstruction. The left ovarian vein ends in the renal vein whereas the right ovarian vein normally enters into the inferior vena cava. In the case of right ovarian vein syndrome, the vein often ends in the renal vein. This is thought to contribute to venous engorgement, in analogy to what is seen in varicoceles, which arise more commonly on the left side. The straight angle between the ovarian vein (or testicular vein in males in the case of varicocoele) and the renal vein has been proposed as a cause of decreased blood return.

A related diagnosis is "Nutcraker Syndrome" where the left renal vein is described as being compressed between the aorta and the superior mesenteric artery. This is reported to cause collateral flow paths to open up to drain the left kidney i.e. reversed flow (reflux caudally) in the left renal vein. Pelvic Congestion Syndrome, vaginal and vulval varices, lower limb varices are clinical sequelae. Virtually all such patient are female and have been pregnant, often multiply.

The ovarian vein often displays incompetent valves. This has been observed more often in women with a higher number of previous pregnancies. Pressure from the baby might hinder the return of blood through the ovarian vein. It has to be noted however that dilation of the urinary tract is a normal observation in pregnancy, due to mechanical compression and the hormonal action of progesterone. Ovarian vein dilatation might also follow venous thrombosis (clotting inside the vein).

Another proposed mechanism of obstruction is when the ovarian vein and ureter both run through a sheath of fibrous tissue, following a local inflammation. This could be seen as a localised form of retroperitoneal fibrosis.[7]

Following obstruction, the ureter displays an abnormal peristalsis (contractions) towards the kidney instead of towards the bladder. This is thought to cause the colicky pain (similar to renal colic), and it is relieved after surgical decompression.


The entity was first described by Clark in 1964.[8] Following initial scepticism and lively discussion in the medical literature,[9][10] it is now recognised by many authors.[1]


  1. ^ a b Tourné G, Ducroux A, Bourbon M, Blinding H (September 2002). "The ovarian vein syndrome: eight cases and review of the literature" (in French). J Gynecol Obstet Biol Reprod (Paris) 31 (5): 471–7. PMID 12379831. http://www.masson.fr/masson/MDOI-JGYN-09-2002-31-5-0368-2315-101019-ART5. 
  2. ^ a b del Valle González N, Estébanez Zarranz J, Escudero Caro T, et al. (January 2006). "Laparoscopic treatment of ovarian vein syndrome" (in Spanish; Castilian). Actas Urol Esp 30 (1): 85–9. PMID 16703736. http://www.actasurologicas.info/v30/n01/ENG/3001NC03.htm. 
  3. ^ Elashry OM, Nakada SY, Wolf JS, Figenshau RS, McDougall EM, Clayman RV (October 1996). "Ureterolysis for extrinsic ureteral obstruction: a comparison of laparoscopic and open surgical techniques". J. Urol. 156 (4): 1403–10. doi:10.1016/S0022-5347(01)65601-5. PMID 8808882. http://linkinghub.elsevier.com/retrieve/pii/S0022-5347(01)65601-5. 
  4. ^ Badger WJ, De EJ, Kaufman RP (2008). "Robotically assisted excision of ovarian vein for intermittent ureteral obstruction". JSLS 12 (2): 166–8. PMC 3016184. PMID 18435891. http://openurl.ingenta.com/content/nlm?genre=article&issn=1086-8089&volume=12&issue=2&spage=166&aulast=Badger. 
  5. ^ Kwon SH, Oh JH, Ko KR, Park HC, Huh JY (2007). "Transcatheter ovarian vein embolization using coils for the treatment of pelvic congestion syndrome". Cardiovasc Intervent Radiol 30 (4): 655–61. doi:10.1007/s00270-007-9040-7. PMID 17468903. 
  6. ^ Moyano Calvo JL, Teba del Pino F, Arellano Gañan R, et al. (November 1993). "[The ovarian vein syndrome. Its treatment by percutaneous embolization and a review of the same]" (in Spanish; Castilian). Arch. Esp. Urol. 46 (9): 802–6. PMID 8304795. 
  7. ^ a b Maubon A, Ferru JM, Thiebaut C, Berger V, Hoche N, Rouanet JP (March 1997). "Left ovarian vein syndrome" (in French). J Radiol 78 (3): 223–5. PMID 9113150. http://www.masson.fr/masson/MDOI-JR-03-1997-78-3-0221-0363-101019-ART59. 
  8. ^ Clark JC. The right ovarian vein syndrome. Emmett J.J. ed. Clinical urography: An Atlas end Texbook of Roentgenologic Diagnosis. 2ª ed. W.B. Saunders Company. Philadelphia 1964;1227-1236.
  9. ^ Dure-Smith P (April 1979). "Ovarian syndrome: is it a myth?". Urology 13 (4): 355–64. doi:10.1016/0090-4295(79)90330-3. PMID 107642. http://linkinghub.elsevier.com/retrieve/pii/0090-4295(79)90330-3. 
  10. ^ Derrick FC, Rosenblum R, Frensilli FJ (May 1973). "Right ovarian vein syndrome. Six-year critique". Urology 1 (5): 383–5. doi:10.1016/0090-4295(73)90364-6. PMID 4204069. 

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