Disorders of Puberty — MCQs
A physician is evaluating a patient with hypogonadotropic hypogonadism and anosmia. What condition is most likely suspected in this scenario?
Delayed puberty in a female is characterized by which of the following?
A 16-year-old girl comes to you with primary amenorrhea; on evaluation there is absent breast development, she has a normal stature, her FSH and LH levels are found to be high and she has a karyotype of 46XX. What is the probable diagnosis?
A child with decreased levels of LH, FSH and Testosterone presents with delayed puberty. Which of the following is the most likely diagnosis –
In Precocious puberty, the age limit for girls is?
Which is false in Congenital Hypopituitarism?
Bone age is advanced in which of the following conditions?
A child with decreased levels of LH, FSH and Testosterone presents with delayed puberty. Which of the following is the most likely Diagnosis
At what age is delayed puberty diagnosed in girls if they have not developed any secondary sexual characteristics?
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Disorders of Puberty Indian Medical PG Practice Questions and MCQs
Question 1: A physician is evaluating a patient with hypogonadotropic hypogonadism and anosmia. What condition is most likely suspected in this scenario?
- A. Asherman's syndrome
- B. Stein-Leventhal syndrome
- C. Sheehan's syndrome
- D. Kallmann syndrome (Correct Answer)
Explanation: ***Kallmann syndrome*** - This syndrome is characterized by **hypogonadotropic hypogonadism** (due to GnRH deficiency) combined with **anosmia** (impaired sense of smell) or hyposmia [1]. - The anosmia results from the **agenesis or hypoplasia of the olfactory bulbs and tracts**, which is a key diagnostic feature. *Asherman's syndrome* - This condition is characterized by **intrauterine adhesions** or synechiae, usually occurring after uterine surgery or infection. - It primarily causes **secondary amenorrhea** and infertility but does not involve hypogonadotropic hypogonadism or anosmia. *Stein-Leventhal syndrome* - This is an older term for **Polycystic Ovary Syndrome (PCOS)**, characterized by **anovulation**, hyperandrogenism, and polycystic ovaries [1]. - It is associated with **insulin resistance** and metabolic dysfunction but not anosmia or hypogonadotropic hypogonadism. *Sheehan's syndrome* - This is a form of **hypopituitarism** caused by **ischemic necrosis of the pituitary gland** following severe postpartum hemorrhage [1]. - It leads to deficiencies in various pituitary hormones, including gonadotropins, but it is typically acute postpartum and does not present with anosmia.
Question 2: Delayed puberty in a female is characterized by which of the following?
- A. Menarche > 16 year (Correct Answer)
- B. FSH < 20 in 16 year
- C. Menarche occurring more than 1 year after breast budding
- D. No breast budding by age 10
Explanation: ***Menarche > 16 year*** - Delayed puberty is defined as the **absence of menarche by 16 years of age**, or the absence of any secondary sexual characteristics by age 13. - This option correctly identifies one of the key diagnostic criteria for delayed puberty in females. *No breast budding by age 10* - This is incorrect; the absence of **breast budding by age 13** is the accepted cutoff for delayed puberty. - Breast development typically begins between ages 8 and 13. *Menarche occurring more than 1 year after breast budding* - This is incorrect; menarche typically occurs within **2 to 3 years** of breast development. A delay of merely one year following breast budding is usually within normal limits. *FSH < 20 in 16 year* - This statement itself does not definitively characterize delayed puberty and requires more context. A **low Follicle-Stimulating Hormone (FSH)** level in a 16-year-old with delayed puberty would suggest a **hypogonadotropic hypogonadism**, whereas high FSH levels would indicate **hypergonadotropic hypogonadism** (e.g., primary ovarian failure). - The threshold of FSH < 20 is not a universal or standalone diagnostic criterion for delayed puberty.
Question 3: A 16-year-old girl comes to you with primary amenorrhea; on evaluation there is absent breast development, she has a normal stature, her FSH and LH levels are found to be high and she has a karyotype of 46XX. What is the probable diagnosis?
- A. Testicular feminizing syndrome
- B. Turner syndrome
- C. Kallmann syndrome
- D. Gonadal dysgenesis (Correct Answer)
Explanation: ***Gonadal dysgenesis*** - **Primary amenorrhea** with **absent breast development** and **high FSH/LH** (hypergonadotropic hypogonadism) in a **46,XX individual** with **normal stature** points to **46,XX gonadal dysgenesis** (pure gonadal dysgenesis). - In this condition, the gonads fail to develop properly despite a normal female karyotype, leading to non-functional streak ovaries that fail to produce estrogen, hence the lack of secondary sexual characteristics and elevated gonadotropins due to lack of negative feedback. - Unlike Turner syndrome, patients have normal stature and a normal 46,XX karyotype. *Testicular feminizing syndrome* - Individuals with **complete androgen insensitivity syndrome (CAIS)**, formerly called testicular feminizing syndrome, have a **46,XY karyotype** and develop external female characteristics due to complete androgen resistance. - They present with **primary amenorrhea** but typically have **well-developed breasts** (from peripheral aromatization of testosterone to estrogen) and a blind-ending vagina, which contradicts the absent breast development in this case. *Turner syndrome* - Characterized by a **45,X karyotype** (or variants with mosaicism) and typically presents with **short stature**, primary amenorrhea, and gonadal dysgenesis. - While it causes **primary amenorrhea** and **absent breast development** with high FSH/LH, the **normal stature** and **46,XX karyotype** in this patient rule out Turner syndrome. *Kallmann syndrome* - This condition is characterized by **hypogonadotropic hypogonadism** associated with **anosmia or hyposmia** due to defective GnRH secretion. - Patients present with **low FSH and LH levels**, which contradicts the **high gonadotropin levels** seen in this case.
Question 4: A child with decreased levels of LH, FSH and Testosterone presents with delayed puberty. Which of the following is the most likely diagnosis –
- A. Klinfelter's syndrome
- B. Kallman's syndrome (Correct Answer)
- C. Testicular Infection
- D. Androgen Insensitive syndrome
Explanation: ***Kallman's syndrome*** - **Kallman's syndrome** is characterized by **hypogonadotropic hypogonadism** with **decreased LH, FSH, and testosterone levels**, leading to **delayed puberty**. - This is a **central/secondary hypogonadism** where the problem lies in the hypothalamus or pituitary, not in the testes. - **Classic associated feature:** Anosmia or hyposmia (impaired sense of smell) due to abnormal migration of GnRH-producing neurons and olfactory bulb development. - The **low gonadotropins (LH and FSH)** distinguish this from primary testicular disorders. *Klinefelter's syndrome* - **Klinefelter's syndrome (47, XXY)** presents with **primary testicular failure** causing **hypergonadotropic hypogonadism**. - Hormonal profile shows **elevated LH and FSH** (not low) as the pituitary attempts to stimulate the failing testes. - This is the opposite hormonal pattern to what is described in the question. - Other features include tall stature, small firm testes, and gynecomastia. *Testicular Infection* - **Testicular infection** (orchitis) causes **primary gonadal failure** with damage to the testes. - Results in **hypergonadotropic hypogonadism** with **elevated LH and FSH**, not decreased levels. - The pituitary increases gonadotropin production in response to poor testicular function. - Does not cause central hypogonadism with low LH and FSH. *Androgen Insensitive syndrome* - **Androgen Insensitivity Syndrome (AIS)** involves a genetic male (46, XY) who is **unresponsive to androgens** due to androgen receptor defects. - Hormone levels show **normal or elevated testosterone** and **normal or elevated LH**. - The body produces testosterone, but peripheral tissues cannot respond to it. - Presents with primary amenorrhea and female external genitalia in complete AIS, not delayed male puberty.
Question 5: In Precocious puberty, the age limit for girls is?
- A. 8 years (Correct Answer)
- B. 10 years
- C. 9 years
- D. 11 years
Explanation: ***8 years*** - Precocious puberty is defined clinically by the development of secondary sexual characteristics in girls before the age of **8 years old**. - This age cut-off is based on population studies and clinical consensus to identify children needing further evaluation for underlying causes. *10 years* - This age is generally considered within the **normal range** for the onset of puberty, not precocious. - Pubertal development typically begins between ages 8 and 13 in girls. *9 years* - While close to the precocious threshold, **9 years** is still considered within the typical window for the onset of puberty. - The established clinical definition for precocious puberty in girls is explicitly _before_ the age of 8. *11 years* - This age is well within the **normal range** for pubertal onset and progression in girls. - Development of secondary sexual characteristics at this age would not be considered precocious.
Question 6: Which is false in Congenital Hypopituitarism?
- A. Hypoglycemia
- B. Growth hormone level < 7 ng/ml
- C. Baby small at birth (Correct Answer)
- D. Delayed puberty
Explanation: ***Baby small at birth*** - This statement is **false** because congenital hypopituitarism typically does not cause **intrauterine growth restriction** or a baby to be small at birth. - Growth hormone (GH) and other pituitary hormones are primarily involved in **postnatal growth**, so infants with this condition are usually of **normal size at birth**. *Hypoglycemia* - **Neonatal hypoglycemia** is a common and often severe manifestation of congenital hypopituitarism, especially due to **GH deficiency** and sometimes ACTH deficiency. - GH and cortisol play crucial roles in **glucose homeostasis**, and their deficiency leads to impaired gluconeogenesis. *Growth hormone level < 7 ng/ml* - A **peak growth hormone level of less than 7 ng/ml** in response to two provocative tests is a common diagnostic criterion for **growth hormone deficiency** in children. - This threshold indicates an inadequate secretion of GH essential for normal growth and metabolism. *Delayed puberty* - **Deficiency of gonadotropins** (LH and FSH) due to hypopituitarism prevents the normal onset and progression of puberty. - This results in features such as **absent or delayed secondary sexual characteristic**s and **incomplete pubertal development**.
Question 7: Bone age is advanced in which of the following conditions?
- A. Congenital adrenal hyperplasia (Correct Answer)
- B. Hypothyroidism
- C. Hypopituitarism
- D. Constitutional delay in growth
Explanation: ***Congenital adrenal hyperplasia*** - In **congenital adrenal hyperplasia (CAH)**, the adrenal glands produce excessive androgens, leading to precocious puberty and **accelerated skeletal maturation**, thus advancing bone age. - The excess androgens cause early fusion of the **epiphyseal growth plates**, leading to a disproportionately taller stature in childhood but potentially shorter adult height. *Hypothyroidism* - **Hypothyroidism** causes delayed growth and development, including **delayed bone age**, due to insufficient thyroid hormone which is crucial for normal skeletal maturation. - Children with hypothyroidism typically have shorter stature for their chronological age and delayed ossification of epiphyses. *Hypopituitarism* - **Hypopituitarism**, especially growth hormone deficiency, leads to **delayed bone age** and significantly stunted growth because growth hormone is essential for normal skeletal development. - Insufficient growth hormone results in slower epiphyseal growth and delayed growth plate closure. *Constitutional delay in growth* - **Constitutional delay in growth and puberty** is characterized by a "late bloomer" pattern, where both linear growth and pubertal development are delayed, resulting in a **delayed bone age**. - These children typically have normal growth velocity for their bone age and will eventually reach a normal adult height, just later than their peers.
Question 8: A child with decreased levels of LH, FSH and Testosterone presents with delayed puberty. Which of the following is the most likely Diagnosis
- A. Klinefelter's syndrome
- B. Kallman's syndrome (Correct Answer)
- C. Testicular infection
- D. Androgen Insensitivity Syndrome
Explanation: ***Kallman's syndrome*** - **Kallmann's syndrome** is characterized by **isolated hypogonadotropic hypogonadism**, meaning the hypothalamus fails to produce **GnRH**, leading to low LH and FSH, and consequently low testosterone, causing delayed puberty. - A key distinguishing feature is the association with **anosmia or hyposmia** (impaired sense of smell) due to abnormal migration of olfactory neurons and GnRH-producing neurons. *Klinefelter's syndrome* - This condition is characterized by **primary hypogonadism** (testicular failure) due to an extra X chromosome (47,XXY), leading to **high LH and FSH** in an attempt to stimulate the failing testes. - Although testosterone is low and puberty is delayed, the **elevated gonadotropins** differentiate it from Kallmann's syndrome. *Testicular infection* - An infection like **orchitis** can lead to testicular damage and *primary hypogonadism*, resulting in low testosterone. - However, similar to Klinefelter's, this would typically cause **elevated LH and FSH** due to the lack of negative feedback from the testes. *Androgen Insensitive syndrome* - In **Androgen Insensitivity Syndrome (AIS)**, testosterone levels are typically **normal or even elevated**, but the body's cells are unable to respond to androgens due to defective receptors. - This condition presents with a female phenotype despite a 46,XY karyotype, and **gonadotropin levels (LH and FSH) are usually normal to high**, not decreased.
Question 9: At what age is delayed puberty diagnosed in girls if they have not developed any secondary sexual characteristics?
- A. 13 years (Correct Answer)
- B. 18 years
- C. 12 years
- D. 16 years
Explanation: ***Correct: 13 years*** - In girls, **delayed puberty** is diagnosed when there are no signs of **breast development (thelarche) by age 13 years** - This represents the upper limit of normal for the onset of secondary sexual characteristics in girls - Absence of any pubertal development by this age warrants evaluation for underlying causes (e.g., hypogonadism, constitutional delay, chronic illness) - Based on **Tanner staging**, breast development typically begins between ages 8-13 years *Incorrect: 18 years* - This age is well beyond the diagnostic threshold for delayed puberty - By 18 years, puberty should be complete in normal girls - Waiting until this age would delay diagnosis and treatment of potentially reversible causes *Incorrect: 12 years* - 12 years is still within the **normal range for onset of puberty** in girls - Many girls normally begin pubertal development at or after age 12 - Diagnosing delayed puberty at this age would be premature and lead to unnecessary investigations *Incorrect: 16 years* - 16 years is the diagnostic age specifically for **absence of menarche** (primary amenorrhea), not for absence of all secondary sexual characteristics - If secondary sexual characteristics are absent by age 16, this indicates severe delay that should have been investigated years earlier (by age 13)
Question 10: The following instrument is used for:
- A. Hypothyroidism
- B. Hypogonadism (Correct Answer)
- C. Hypoadrenalism
- D. Soto syndrome
Explanation: ***Hypogonadism*** - The image displays an **orchidometer**, specifically a Prader orchidometer, which is a medical instrument used to measure the **volume of the testes**. - Testicular volume measurement is crucial for diagnosing and monitoring conditions like **hypogonadism**, where testicular size can be reduced. - It is primarily used to assess **pubertal development** and detect **delayed or precocious puberty**. *Hypothyroidism* - Hypothyroidism is a condition caused by **underactive thyroid gland**, leading to low thyroid hormone production. - While it can cause various systemic symptoms, it is not primarily diagnosed or monitored using an orchidometer. *Hypoadrenalism* - Hypoadrenalism, or Addison's disease, is a condition where the **adrenal glands produce insufficient steroid hormones**. - Diagnosis involves **blood tests measuring hormone levels** (e.g., cortisol, aldosterone) and is unrelated to testicular volume measurement. *Soto syndrome* - **Soto syndrome** is a genetic overgrowth disorder characterized by **excessive physical growth** during childhood, along with intellectual disability and distinctive facial features. - Its diagnosis is based on **clinical features and genetic testing**, not testicular volume measurement. - While some overgrowth syndromes can have testicular findings, the orchidometer is not a primary diagnostic tool for Soto syndrome.
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