Mayer-Rokitansky-Kuster-Hauser Syndrome
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Direct answer
Mayer-Rokitansky-Kuster-Hauser syndrome is Müllerian agenesis in a 46,XX woman with normal ovaries, normal breast development and normal external genitalia, presenting with primary amenorrhoea and a short or absent vagina. The uterus is absent or rudimentary because the Müllerian ducts fail to form, while ovarian function is preserved. Renal and skeletal anomalies are commonly associated, so renal ultrasound is required at diagnosis.
What you must remember
- Incidence: commonly quoted at about one in 4,000 to 5,000 female births, and it is among the commoner causes of primary amenorrhoea.
- Karyotype and ovaries: 46,XX with normal ovarian function, so pubic hair, breast development and oestrogen-dependent features are normal.
- Type I and type II: type I is isolated uterovaginal aplasia, while type II includes associated renal, skeletal, cardiac or hearing anomalies.
- Renal anomalies: unilateral renal agenesis, pelvic kidney, horseshoe kidney and ectopic ureter are reported, with renal involvement in about a third of cases.
- Skeletal and hearing screen: vertebral anomalies and hearing loss are recognised associations, so spinal and hearing assessment is appropriate in type II disease.
- Neovagina options: graded non-surgical dilation (the Frank method) is usually tried first, while the Vecchietti traction method, a McIndoe split-skin graft and the Davydov peritoneal technique are surgical alternatives.
A stepwise evaluation from amenorrhoea to neovagina
A 17-year-old girl has never menstruated, has normal breasts and pubic hair, and has a shallow dimple in place of a vagina. The findings suggest MRKH, and the work-up must confirm the diagnosis and exclude associated anomalies. The steps below show the usual order.
- Confirm the absent uterus: Pelvic ultrasound or MRI shows an absent or rudimentary uterus with normal ovaries.
- Check the karyotype: A 46,XX result separates this condition from androgen insensitivity, which is 46,XY.
- Assess the kidneys: Renal ultrasound at diagnosis identifies agenesis or ectopia, and cross-sectional imaging is added when needed.
- Screen other systems: The spine and hearing are examined, and echocardiography is considered where type II disease is suspected.
- Counsel before surgery: The patient is told about the absent uterus, the options for vaginal creation, and the routes to parenthood, with psychological support offered throughout.
- Choose the neovagina method: Graded dilation is started where the patient can use it, and surgery is offered if dilation fails or the patient prefers an operation.
Where the exam tries to catch you
Examiners test whether you can separate this 46,XX condition from androgen insensitivity and recognise associated anomalies.
- Trap: Diagnose androgen insensitivity because the vagina is short. Correct: This condition is 46,XX with normal ovaries and no testes, so karyotype and gonadal assessment separate the two.
- Trap: Skip renal imaging because the genital tract anomaly is obvious. Correct: Renal anomalies are common and change the surgical approach near the pelvis and ureters, so renal ultrasound is mandatory.
- Trap: Treat uterus transplantation as standard care in India. Correct: Uterus transplantation remains largely experimental, while altruistic gestational surrogacy is the established route under the Surrogacy (Regulation) Act, 2021.
- Trap: Start surgery before attempting dilation. Correct: Graded dilation is usually the first-line method and avoids the risks of an operation when it succeeds.
Frequently asked questions
What is the karyotype in Mayer-Rokitansky-Kuster-Hauser syndrome?
Mayer-Rokitansky-Kuster-Hauser syndrome is associated with a normal 46,XX karyotype and normal ovarian function. The uterus and upper vagina are absent because the Müllerian ducts fail to develop, so secondary sexual characteristics are normal but primary amenorrhoea occurs.
Which kidney anomalies are associated with Mayer-Rokitansky-Kuster-Hauser syndrome?
Unilateral renal agenesis, pelvic kidney, horseshoe kidney and ectopic ureter are the renal anomalies reported with Mayer-Rokitansky-Kuster-Hauser syndrome. A renal ultrasound at diagnosis is essential because these anomalies affect surgical planning.
What is the first-line treatment for vaginal creation in Mayer-Rokitansky-Kuster-Hauser syndrome?
Non-surgical graded vaginal dilation, often called the Frank method, is usually the first-line treatment for vaginal creation in this condition. Surgical methods such as the Vecchietti or McIndoe techniques are reserved for patients in whom dilation fails or who prefer an operation.
Can a woman with Mayer-Rokitansky-Kuster-Hauser syndrome have a biological child?
Women with Mayer-Rokitansky-Kuster-Hauser syndrome have normal ovaries, so eggs can be retrieved for IVF, but pregnancy needs a gestational carrier because there is no uterus. In India, surrogacy is permitted only as altruistic surrogacy under the Surrogacy (Regulation) Act, 2021.
Does Mayer-Rokitansky-Kuster-Hauser syndrome affect ovarian function?
Mayer-Rokitansky-Kuster-Hauser syndrome does not affect ovarian function, because the ovaries develop normally in a 46,XX girl. Hormone levels and secondary sexual development are usually normal, which is why the diagnosis often presents with primary amenorrhoea alone.