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Ovarian pregnancy

 

Ovarian pregnancy

Ovarian pregnancy
Classification and external resources
ICD-10 O00.2
ICD-9 633.2

Ovarian pregnancy refers to an ectopic pregnancy that is located in the ovary. Typically the egg cell is not released or picked-up at ovulation, but fertilized within the ovary where the pregnancy implants.[1][2][3] Such a pregnancy usually does not proceed past the first four weeks of pregnancy.[3] An untreated ovarian pregnancy causes potentially fatal intraabdominal bleeding and thus may become a medical emergency.

Contents

  • Incidence 1
  • Etiology and pathology 2
  • Diagnosis 3
  • Management 4
  • References 5
  • External links 6

Incidence

Ovarian pregnancies are rare: the vast majority of ectopic pregnancies occur in the fallopian tube; only about 0.15-3% of ectopics occur in the ovary.[4] The incidence has been reported to be about 1:3,000[5] to 1:7,000 deliveries.[4]

Etiology and pathology

The etiology of ovarian pregnancy is unknown, specifically as the usual causative factors – pelvic inflammatory disease and pelvic surgery – implicated in tubal ectopic pregnancy seem to be uninvolved.[6] There appears to be a link to the intrauterine device (IUD),[5][6] however, it cannot be concluded that this is causative as it could be that IUDs prevent other but not ovarian pregnancies. Some have suggested that patients who undergo IVF therapy are at higher risk for ovarian pregnancy.[7]

An ovarian pregnancy is usually understood to begin when a mature

  • The Ectopic Pregnancy Trust - Information and support for those who have suffered the condition by a medically overseen and moderated UK based charity, recognised by the National Health Service (UK) Department of Health (UK) and the Royal College of Obstetricians and Gynaecologists

External links

  1. ^ Lin EP, Bhatt S, Dogra VS. (2008). "Diagnostic clues to ectopic pregnancy.". Radiographics. 28 (6): 1661–71.  
  2. ^ a b Speert H. Otto Spiegelberg and His criteria of Ovarian Pregnancy, in Obstetric and Gynecologic Milestones. The MacMillan Company, New York, 1958. p. 255ff. 
  3. ^ a b c d e f g h Helde MD, Campbell JS, Himaya A, Nuyens JJ, Cowley FC, Hurteau GD (1972). "Detection of unsuspected ovarian pregnancy by wedge resection". Can Med Assoc J. 106 (3): 237–42.  
  4. ^ a b c d e Nwanodi O, Khulpateea N. (2006). "The preoperative diagnosis of primary ovarian pregnancy". Natl Med Assoc. 98 (5): 796–8.  
  5. ^ a b c d Raziel A, Schachter M, Mordechai E, Friedler S, Panski M, Ron-El R. (2004). "Ovarian pregnancy-a 12-year experience of 19 cases in one institution". Eur J Obstet Gynecol Reprod Biol. 114 (1): 92–6.  
  6. ^ a b Ercal T, Cinar O, Mumcu A, Lacin S, Ozer E. (1997). "Ovarian pregnancy; relationship to an intrauterine device". Aust N Z J Obstet Gynaecol. 37 (3): 362–4.  
  7. ^ Priya S, Kamala S, Gunjan S. (2009). "Two interesting cases of ovarian pregnancy after in vitro fertilization-embryo transfer and its successful laparoscopic management". Fertil Steril. 92 (1): 394.e17–9.  
  8. ^ a b c d e Odejinmi F, Rizzuto MI, Macrae R, Olowu O, Hussain M. (2009). "Diagnosis and laparoscopic management of 12 consecutive cases of ovarian pregnancy and review of literature". J Minim Invasive Gynecol. 16 (3): 354–9.  
  9. ^ Manjula NV, Sundar G, Shetty S, Sujani BK, Mamatha, . "A rare case of a ruptured ovarian pregnancy". Proc Obstet Gynecol.  http://ir.uiowa.edu/cgi/viewcontent.cgi?article=1046&context=pog .
  10. ^ Habbu J, Read MD (2006). "Ovarian pregnancy successfully treated with methotrexate". J Obstet Gynaecol. 26 (6): 587–8.  
  11. ^ Kudo M, Tanaka T, Fujimoto S. (1988). "A successful treatment of left ovarian pregnancy with methotrexate". Nippon Sanka Fujinka Gakkai Zasshi. 40 (6): 811–3.  

References

An ovarian pregnancy can develop together with a normal intrauterine pregnancy; such a heterotopic pregnancy will call for expert management as not to endanger the intrauterine pregnancy.

Ovarian pregnancies have been successfully treated with methotrexate[10] since it was introduced in the management of ectopic pregnancy in 1988.[11]

Ovarian pregnancies are dangerous and prone to internal bleeding. Thus, when suspected, intervention is called for. Traditionally, an explorative laparotomy was performed, and once the ovarian pregnancy was identified, an oophorectomy or salpingo-oophorectomy was performed, including the removal of the pregnancy. Today, the surgery can often be performed via laparoscopy.[8] The extent of surgery varies according to the amount of tissue destruction that has occurred. Patients with an ovarian pregnancy have a good prognosis for future fertility and therefore conservative surgical management is advocated.[9] Further, in attempts to preserve ovarian tissue, surgery may involve just the removal of the pregnancy with only a part of the ovary.[8] This can be accomplished by an ovarian wedge resection.[5]

Management

An ovarian pregnancy can be mistaken for a tubal pregnancy or a hemorrhagic ovarian cyst or corpus luteum prior to surgery.[4] Sometimes, only the presence of trophoblastic tissue during the histologic examination of material of a bleeding ovarian cyst shows that an ovarian pregnancy was the cause of the bleeding.[3][4]

  • The gestational sac is located in the region of the ovary.
  • The gestational sac is attached to the uterus by the ovarian ligament.
  • Ovarian tissue is histologically proven in the wall of the gestational sac.
  • The oviduct on the affected side is intact (this criterion, however, holds not true for a longer ongoing ovarian pregnancy[3]).

Histologically, the diagnosis has been made by Spiegelberg criteria on the surgical specimen of the removed ovary and tube. However, the tube and ovary are not usually removed as sonography allows for earlier diagnosis and surgeons strive to preserve the ovary. Prior to the introduction of Spiegelberg's criteria in 1878, the existence of ovarian pregnancy was in doubt; his criteria helped to identify the ovarian pregnancy from other ectopics :[2]

Ideally, ultrasound will show the location of the gestational sac in the ovary, while the uterine cavity is "empty", and if there is internal bleeding, it can be identified.[8] Because of the proximity of the tube, the sonographic distinction between a tubal and an ovarian pregnancy may be difficult. Serial hCG levels generally show not the normal progressive rise.[4] [8] In a series of 12 patients the mean gestation age was 45 days.[8]

The diagnosis is made in asymptomatic pregnant women by obstetric ultrasonography. On pelvic examination a unilateral adnexal mass may be found. Typical symptoms are abdominal pain and, to a lesser degree, vaginal bleeding during pregnancy. Patients may present with hypovolemia or be in circulatory shock because of internal bleeding.[5]

Diagnosis

[3], and an occasional delivery has been reported.abdominal pregnancy In very rare occasions the pregnancy may find a sufficient foothold outside the ovary to continue as an [3]

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