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Questions and Answers
Define primary amenorrhea.
Define primary amenorrhea.
Primary amenorrhea is the absence of menstrual bleeding in a girl by age 14 without secondary sexual development or by age 16 with secondary sexual development.
What is the most likely diagnosis for a 17-year-old girl with primary amenorrhea and normal secondary sexual characteristics?
What is the most likely diagnosis for a 17-year-old girl with primary amenorrhea and normal secondary sexual characteristics?
Mullerian agenesis is the most likely diagnosis in this case.
What is the next step in the diagnosis for a suspected case of Mullerian agenesis?
What is the next step in the diagnosis for a suspected case of Mullerian agenesis?
Serum testosterone levels or a karyotype analysis should be performed next.
List two potential causes of primary amenorrhea associated with normal secondary sexual characteristics.
List two potential causes of primary amenorrhea associated with normal secondary sexual characteristics.
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How is primary amenorrhea classified based on secondary sexual characteristics?
How is primary amenorrhea classified based on secondary sexual characteristics?
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Explain the physiological causes of amenorrhea during pre-puberty.
Explain the physiological causes of amenorrhea during pre-puberty.
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What are the implications of diagnosed primary amenorrhea on fertility management?
What are the implications of diagnosed primary amenorrhea on fertility management?
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Identify the role of the hypothalamus in the menstrual cycle.
Identify the role of the hypothalamus in the menstrual cycle.
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What are the two main classifications of absent secondary sexual characteristics in terms of stature?
What are the two main classifications of absent secondary sexual characteristics in terms of stature?
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Differentiate between congenital and acquired hypogonadotropic hypogonadism.
Differentiate between congenital and acquired hypogonadotropic hypogonadism.
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What condition is characterized by gonadal agenesis in individuals with XX or XY chromosomal make-up?
What condition is characterized by gonadal agenesis in individuals with XX or XY chromosomal make-up?
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How can breast development serve as an indicator of estrogen production?
How can breast development serve as an indicator of estrogen production?
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What symptoms may indicate the presence of an imperforate hymen in early childhood?
What symptoms may indicate the presence of an imperforate hymen in early childhood?
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What is haematometra and when does it occur?
What is haematometra and when does it occur?
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In the context of sex development disorders, what is the significance of identifying whether a uterus is present or absent?
In the context of sex development disorders, what is the significance of identifying whether a uterus is present or absent?
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What complications can arise from a transverse vaginal septum?
What complications can arise from a transverse vaginal septum?
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What is Mayer-Rokitansky-Kuster-Hauser (MRKH) syndrome and what is its primary sign?
What is Mayer-Rokitansky-Kuster-Hauser (MRKH) syndrome and what is its primary sign?
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What are the common associated anomalies with MRKH syndrome?
What are the common associated anomalies with MRKH syndrome?
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Explain the role of the androgen receptor in androgen insensitivity and its effects on physical development.
Explain the role of the androgen receptor in androgen insensitivity and its effects on physical development.
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What presenting symptom is common in both MRKH syndrome and the failure of cervical development?
What presenting symptom is common in both MRKH syndrome and the failure of cervical development?
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What distinguishes the uterine development in patients with androgen insensitivity?
What distinguishes the uterine development in patients with androgen insensitivity?
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What condition is described as a rare cause of primary amenorrhea marked by elevated levels of gonadotrophins?
What condition is described as a rare cause of primary amenorrhea marked by elevated levels of gonadotrophins?
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What is a key physical examination finding in individuals with MRKH syndrome?
What is a key physical examination finding in individuals with MRKH syndrome?
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How is the vaginal structure affected in individuals with developed uterine bodies but absent cervixes?
How is the vaginal structure affected in individuals with developed uterine bodies but absent cervixes?
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What are two potential causes of ovarian failure in patients who underwent treatment for childhood malignancy?
What are two potential causes of ovarian failure in patients who underwent treatment for childhood malignancy?
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How does galactosaemia lead to ovarian cellular destruction?
How does galactosaemia lead to ovarian cellular destruction?
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What is a common congenital infection that can lead to hypogonadotrophic hypogonadism?
What is a common congenital infection that can lead to hypogonadotrophic hypogonadism?
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What syndrome is characterized by a chromosomal composition of 45X and associated ovarian failure?
What syndrome is characterized by a chromosomal composition of 45X and associated ovarian failure?
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What developmental milestone should be noted in the history of a patient with primary amenorrhea?
What developmental milestone should be noted in the history of a patient with primary amenorrhea?
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Why is it important to calculate Body Mass Index (BMI) during the physical examination of a patient with amenorrhea?
Why is it important to calculate Body Mass Index (BMI) during the physical examination of a patient with amenorrhea?
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What physical findings might indicate a diagnosis of ovarian agenesis during examination?
What physical findings might indicate a diagnosis of ovarian agenesis during examination?
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What is cryptomenorrhoea, and how might it be identified in an examination?
What is cryptomenorrhoea, and how might it be identified in an examination?
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What investigations can be performed to assess chromatin status?
What investigations can be performed to assess chromatin status?
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When is a full chromosome analysis necessary?
When is a full chromosome analysis necessary?
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Which hormonal levels should be investigated for assessing ovarian function?
Which hormonal levels should be investigated for assessing ovarian function?
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What is the significance of ultrasound in this context?
What is the significance of ultrasound in this context?
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What should be done for patients with an absent uterus?
What should be done for patients with an absent uterus?
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What is the recommended management for girls with an XY karyotype and no uterus?
What is the recommended management for girls with an XY karyotype and no uterus?
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What is the most common diagnosis when other syndromes are excluded?
What is the most common diagnosis when other syndromes are excluded?
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What surgical intervention is recommended for an imperforate hymen?
What surgical intervention is recommended for an imperforate hymen?
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Study Notes
Primary Amenorrhea
- Primary amenorrhea is the absence of menstruation by age 14 without secondary sexual development or age 16 with secondary sexual development.
- Primary amenorrhea is classified into two categories: with and without the presence of secondary sexual characteristics.
- Secondary sexual characteristics refer to the development of breasts, axillary and pubic hair, and growth.
Causes of Primary Amenorrhea
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With secondary sexual characteristics:
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Imperforate Hymen
- Presents as a bulging hymen behind which is a mucocele, the vagina expanded by vaginal secretions of mucus.
- May also present later in life with cyclical abdominal pain due to dysmenorrhea associated with the accumulation of menstrual blood within the vagina.
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Transverse Vaginal Septum
- The vagina fails to cannulate, leading to separate upper and lower parts.
- Girls present with cyclical abdominal pain due to the development of haematocolpos.
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Absent Vagina and Functioning Uterus
- Secondary sexual characteristics are normal, ovarian function is unaffected.
- Examination of the genital area discloses normal female external genitalia but blind-ending vaginal dimple.
- Known as Mayer-Rokitansky-Kuster-Hauser (MRKH) syndrome and uterine development is usually absent.
- Often small uterine remnants (anlage) are found on the lateral pelvic side walls.
- 40% of these patients have renal anomalies, for example an absent kidney, and skeletal abnormalities.
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Absent Vagina and Non-Functioning Uterus
- A rare phenomenon when embryologically the uterine body has developed normally but there is failure of development of the cervix.
- Leads to failure of the development of the upper vagina.
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XY Female (Androgen Insensitivity)
- Structural abnormality of the androgen receptor, due to defects in the androgen receptor gene, which results in a non-functional receptor.
- Prevents the masculinizing effect of testosterone during normal development.
- Patients are phenotypically female with normal breasts and external genitalia.
- Scanty pubic hair, short vagina, absent uterus and tubes, and testes are usually found in the lower abdomen or occasionally in hernial sacs in childhood.
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Resistant Ovary Syndrome
- Extremely rare cause of primary amenorrhea.
- There are elevated levels of gonadotrophin in the presence of apparently normal ovarian tissue.
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Ovarian Failure
- May occur as a result of either chemotherapy or radiotherapy for childhood malignancy.
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Galactosemia
- This inborn error of galactose metabolism is due to deficiency of galactose-1-phosphate uridyltransferase.
- Patients have an acute toxic syndrome that causes ovarian cellular destruction thought to be due to the accumulation of galactose-1 -phosphate.
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Without secondary sexual characteristics:
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Hypogonadotropic Hypogonadism
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Congenital:
- Isolated gonadotrophin-releasing hormone deficiency
- Olfactogenital syndrome
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Acquired:
- Weight loss/anorexia
- Excessive exercise
- Hyperprolactinaemia
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Congenital:
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Hypergonadotrophic Hypogonadism
- Gonadal agenesis
- XX or XY agenesis
- Gonadal dysgenesis
- Turner mosaic
- Other X deletions or mosaics
- Ovarian failure
- Galactosaemia
- Gonadal agenesis
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Short Stature
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Hypogonadotropic Hypogonadism:
- Hydrocephalus
- Trauma
- Empty sella syndrome
- Tumors
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Hypergonadotrophic Hypogonadism:
- Turner syndrome
- Other X deletions or mosaics
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Hypogonadotropic Hypogonadism:
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Clinical Approach to Diagnosing Primary Amenorrhea
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Physical Examination:
- Evaluates secondary sexual characteristics (breast development, axillary and pubic hair, growth).
- Breasts are an endogenous assay of estrogen.
- Presence of breasts indicates adequate estrogen production.
- Absence of breasts indicates inadequate estrogen exposure.
- Performs an ultrasound of the pelvis to assess the presence of a normal uterus.
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Investigations:
- Buccal smear and an examination of the polymorphonuclear leucocytes to determine if chromatin positive (probably XX) or chromatin negative (probably XO or XY).
- Full chromosome analysis may be needed to exclude mosaicism and AIS.
- Hormonal investigations should include LH, FSH, prolactin, oestradiol and testosterone levels.
- Ultrasound will help determine the presence, state and size of the ovaries and any follicular activity.
- Uterine size can also be seen.
Management of Primary Amenorrhea
- Constitutional delay is undoubtedly the most common diagnosis.
- Patients with an absent uterus require special psychological counselling and their care should be managed in a centre able to offer the complete range of psychological, psychosexual and gynaecological expertise.
- At the appropriate time a vagina may be created either non-surgically or surgically.
- In girls found to have an XY karyotype, careful counselling is necessary over the malignant potential of their gonads. Gonads must be removed after counselling is complete.
- In outflow tract obstruction, surgical management may occur at various levels.
- Imperforate hymen: a cruciate incision in the hymen allows drainage of the retained menstrual blood.
- Transverse vaginal septae: require specialist reconstruction to create a vagina.
- If investigations suggest constitutional delay and development of secondary sexual characteristics is complete, there is no need to suggest any treatment other than annual review.
- If the diagnosis of resistant ovary syndrome is suspected, then diagnosis can only be made by ovarian biopsy and subsequent histology confirming or illustrating the absence of oocytes.
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Description
This quiz explores the definition and causes of primary amenorrhea, including the distinction between cases with and without secondary sexual characteristics. Key conditions such as imperforate hymen and transverse vaginal septum are also discussed. Test your understanding of this important gynecological topic!