Müllerian agenesis

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Müllerian agenesis
Classification and external resources
Agenesia de vagina2.png
Female with MRKH
ICD-10 Q51.0, Q52.0
ICD-9 626.0
OMIM 158330
DiseasesDB 8390

Müllerian agenesis, also called Mayer-Rokitansky-Küster-Hauser syndrome or MRKH, named after August Franz Joseph Karl Mayer, Carl Freiherr von Rokitansky, Hermann Kuster, and G. A. Hauser, is a congenital malformation characterized by a failure of the Müllerian duct to develop, resulting in a missing uterus and variable malformations of the upper portion of the vagina. It is the third most common cause of primary amenorrhoea, after pregnancy and gonadal failure (such as from Turner syndrome). A review of the literature can be found in the Orphanet Journal of Rare Diseases [1]

Signs and symptoms[edit]

An individual with this condition is hormonally normal; that is, they will enter puberty with development of secondary sexual characteristics including thelarche and adrenarche (pubic hair). Their chromosome constellation will be 46,XX. Ovaries are intact and ovulation usually occurs. Typically, the vagina is shortened and intercourse may, in some cases, be difficult and painful. Medical examination supported by gynecologic ultrasonography demonstrates a complete or partial absence of the cervix, uterus, and vagina.

If there is no uterus, people with MRKH cannot carry a pregnancy. However, it is possible for them to have genetic offspring by in vitro fertilization (IVF) and surrogacy. Treatment by uterine transplantation is still in its infancy.[2]

People with MRKH typically discover the condition when, during puberty years, the menstrual cycle does not start (primary amenorrhoea). Some find out earlier through surgeries for other conditions, such as a hernia.

Classification[edit]

  • Typical MRKH – Isolated uterovaginal aplasia/hypoplasia
    • Prevalence – 64 percent
  • Atypical MRKH – Uterovaginal aplasia/hypoplasia with renal malformation or uterovaginal aplasia/hypoplasia with ovarian dysfunction
    • Prevalence – 24 percent
  • MURCS syndrome – Uterovaginal aplasia/hypoplasia with renal malformation, skeletal malformation, and cardiac malformation
    • Prevalence – 12 percent[3]

Causes[edit]

WNT4 has been clearly implicated in the atypical version of this disorder. A genetic mutation causes a leucine to proline residue substitution at amino acid position 12.[3] This occurrence reduces the intranuclear levels of β catenin. In addition, it removes the inhibition of steroidogenic enzymes like 3β-hydroxysteriod dehydrogenase and 17α-hydroxylase. Patients therefore have androgen excess.[3] Furthermore, without WNT4, the Müllerian duct is either deformed or absent. Female reproductive organs, such as the cervix, fallopian tubes, ovaries, and much of the vagina, are hence affected.[4]

An association with a deletion mutation in chromosome 17 (17q12) has been reported. The gene LHX1 is located in this region and may be the cause of a number of these cases.[5]

Prevalence[edit]

The estimated prevalence is 1 in 4000-5000 females with XX chromosomes.[6] Queen Amalia of Greece was found post mortem to have had the syndrome.[7] Her inability to provide an heir contributed to the overthrow of her husband, King Otto.[7]

Treatment[edit]

A number of treatments have become available to create a functioning vagina, yet in the absence of a uterus currently no surgery is available to make pregnancy possible. The recent development of engineered vaginas using the patient's own cells has resulted in fully functioning vaginas capable of menstruation and orgasm in a number of patients showing promise of fully correcting this condition in some of the sufferers.[8][9]

Traditional approaches used vaginal dilators and/or surgery to develop a functioning vagina to allow for penetrative sexual intercourse. A number of surgical approaches have been used. In the McIndoe procedure,[10] a skin graft is applied to form an artificial vagina. After the surgery, dilators are still necessary to prevent vaginal stenosis. The Vecchietti procedure has been shown to result in a vagina that is comparable to a normal vagina in patients.[11][12] In the Vecchietti procedure, a small plastic “olive” is threaded against the vaginal area, and the threads are drawn through the vaginal skin, up through the abdomen and through the navel using laparoscopic surgery. There the threads are attached to a traction device. The operation takes about 45 minutes. The traction device is then tightened daily so the olive is pulled inwards and stretches the vagina by approximately 1 cm per day, creating a vagina approximately 7 cm deep in 7 days, although it can be more than this.[13] Another approach is the use of an autotransplant of a resected sigmoid colon using laparoscopic surgery; results are reported to be very good with the transplant becoming a functional vagina.[14]

Uterine transplantation has been performed in a number of women with MRKH, but the surgery is still in the experimental stage.[15] To date, there have been some pregnancies in transplanted uteruses, but all these pregnancies resulted in miscarriages. Since ovaries are present, people with this condition can have genetic children through IVF with embryo transfer to a gestational carrier. Some also choose to adopt.[16][17]

Promising research include the use of laboratory-grown structures, which are less subject to the complications of non-vaginal tissue, and may be grown using the woman's own cells as a culture source.[18][19]

Original publications[edit]

  • Mayer CAJ: Uber Verdoppelungen des Uterus und ihre Arten, nebst Bemerkungen über Hasenscharte und Wolfsrachen. J Chir Auger 1829; 13:525-565.
  • Rokitansky K: Uber die sogenannten Verdoppelungen des Uterus. Med Jahrb Ost Staat 1838; 26:39-77.
  • Küster H: Uterus bipartitus solidus rudimentarius cum vagina solida. Z Geb Gyn 1910; 67:692.
  • Hauser GA, Schreiner WE: Mayer-Rokitansky-Küster syndrome: rudimentary solid bipartite uterus with solid vagina. Schweiz Med Wochenschr 1961; 91:381-384

See also[edit]

References[edit]

  1. ^ Morcel, Karine; Laure Camborieux; Daniel Guerrier (2007). "Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome". Orphanet J Rare Dis 2 (13): 13. doi:10.1186/1750-1172-2-13. PMC 1832178. PMID 17359527. 
  2. ^ "Woman 'to receive mother's womb'". MSN News. 13 June 2011. Retrieved 13 June 2011. 
  3. ^ a b c Sultan, C.; Biason-Lauber, A.; Philibert, P. (2009). "Mayer–Rokitansky–Kuster–Hauser syndrome: Recent clinical and genetic findings". Gynecological Endocrinology 25 (1): 8–11. doi:10.1080/09513590802288291. PMID 19165657.  edit
  4. ^ "WNT4 Müllerian aplasia and ovarian dysfunction". Genetics Home Reference. Retrieved 2012-08-18. 
  5. ^ Ledig S, Brucker S, Barresi G, Schomburg J, Rall K, Wieacker P (2012) Frame shift mutation of LHX1 is associated with Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome. Hum Reprod
  6. ^ Pittock, Siobhán T.; Babovic-Vuksanovic, Dusica; Lteif, Aida (15 June 2005). "Mayer-Rokitansky-Küster-Hauser anomaly and its associated malformations". American Journal of Medical Genetics Part A 135A (3): 314–316. doi:10.1002/ajmg.a.30721. PMID 15887261. 
  7. ^ a b Poulakou-Rebelakou, E; C Tsiamis; N Tompros; G Creatsas (2011). "The lack of a child, the loss of a throne: the infertility of the first royal couple of Greece (1833–62)". J R Coll Physicians Edinb 41 (1): 73–33. doi:10.4997/JRCPE.2011.115. PMID 21365071. 
  8. ^ Catherine de Lange (2014). "Engineered vaginas grown in women for the first time". New Scientist. 
  9. ^ Raya-Rivera AM, Esquiliano D, Fierro-Pastrana R, Lopez-Bayghen E, Valencia P, Ordorica-Flores R, Soker S, Yoo JJ, Atala A (2014-04-11). "Tissue-engineered autologous vaginal organs in patients: a pilot cohort study". Lancet. doi:10.1016/S0140-6736(14)60542-0. 
  10. ^ S. Saraf; P. Saraf (2007). "McIndoe Vaginoplasty: Revisited". The Internet Journal of Gynecology and Obstetrics (Internet Scientific Publications) 6 (2). ISSN 1528-8439. Retrieved 2009-07-17. 
  11. ^ Vecchietti G (1965). "[Creation of an artificial vagina in Rokitansky-Küster-Hauser syndrome]". Attual Ostet Ginecol (in Italian) 11 (2): 131–47. PMID 5319813. 
  12. ^ Fedele L, Bianchi S, Tozzi L, Borruto F, Vignali M (1996). "A new laparoscopic procedure for creation of a neovagina in Mayer-Rokitansky-Kuster-Hauser syndrome". Fertil. Steril. 66 (5): 854–7. PMID 8893702. 
  13. ^ "Vecchietti Procedure". University College University Hospitals. Retrieved 2010-04-03. .
  14. ^ Hold MK (2007-01-16). "Modernes Management der angeborenen (Mayer-Rokitansky- Küster-Hauser, MRKH-Syndrom) und erworbenen Vaginalaplasie". Frauenheilkunde-Aktuell (in German). 
  15. ^ Ozkan, Omer; Akar, Munire Erman; Ozkan, Ozlenen; Erdogan, Okan; Hadimioglu, Necmiye; Yilmaz, Murat; Gunseren, Filiz; Cincik, Mehmet; Pestereli, Elif; Kocak, Huseyin; Mutlu, Derya; Dinckan, Ayhan; Gecici, Omer; Bektas, Gamze; Suleymanlar, Gultekin (February 2013). "Preliminary results of the first human uterus transplantation from a multiorgan donor". Fertility and Sterility 99 (2): 470–476.e5. doi:10.1016/j.fertnstert.2012.09.035. PMID 23084266. 
  16. ^ Akhter, Nasreen; Begum, Badrunnesa (3 February 2013). "Evaluation and management of cases of primary amenorrhoea with MRKH syndrome". Bangladesh Medical Journal Khulna 45 (1–2). doi:10.3329/bmjk.v45i1-2.13626. 
  17. ^ "Rokitansky Syndrome: Information for Parents / Carers". St Mary's Hospital, Manchester. Retrieved 11 April 2014. 
  18. ^ "Laboratory-grown vaginas implanted in patients". Retrieved 14 April 2014. 
  19. ^ Atlántida M Raya-Rivera et al. "Tissue-engineered autologous vaginal organs in patients: a pilot cohort study". Elsevier Ltd. Retrieved 14 April 2014. 
Further reading
  • Varner, RE; Younger, JB; Blackwell, RE (Jun 1985). "Müllerian dysgenesis.". The Journal of reproductive medicine 30 (6): 443–50. PMID 4020785. 

External links[edit]