Reproductive Pathology Practice Questions

Q: Identify the type of testicular cancer represented in the image.

Seminoma. ***Seminoma*** [1][2] - Characterized by the presence of **large, uniform cells** and often shows a **fried egg appearance** on histology [2]. - It typically occurs in **younger males** and has a better prognosis compared to non-seminomatous germ cell tumors (NSGCTs) [1]. *Non-seminoma* [1] - Encompasses a variety of tumors, including **teratoma**, **choriocarcinoma**, and **yolk sac tumors**, each with distinct histological features [1]. - Generally associated with a **worse prognosis** compared to seminomas. *Germ cell differentiate tumor* [1][3] - This term is too broad and does not specifically refer to a distinct category of tumors; rather it encompasses all **germ cell tumors** [1]. - Seminomas and non-seminomas are the two main classifications of germ cell tumors, making this option imprecise [1][3]. *Teratoma* [1][4] - Composed of various differentiated cell types, often containing **hair, teeth, or muscle tissue**, which is distinct from the typical presentation of seminomas [4]. - Teratomas can occur in any age group and are not limited to the germ cell tumor categorization of seminomas [4]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lower Urinary Tract and Male Genital System, pp. 979-980. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lower Urinary Tract and Male Genital System, pp. 980-982. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 512-513. [4] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lower Urinary Tract and Male Genital System, pp. 982-983.

Q: What is the number of Barr bodies present in Klinefelter's syndrome?

1. ***1*** - **Klinefelter's syndrome** typically has a 47,XXY karyotype, meaning there are two X chromosomes [1]. - The number of Barr bodies is calculated as **N-1**, where N is the total number of X chromosomes. In this case, 2-1 = **1 Barr body** [1]. - This follows the principle that one X chromosome remains active while additional X chromosomes are inactivated [1]. *0* - **No Barr bodies** are found in individuals with a normal male karyotype (46,XY) or in Turner syndrome (45,XO), neither of which describes Klinefelter's syndrome [1]. - The presence of at least one Barr body indicates the presence of at least two X chromosomes. *2* - **Two Barr bodies** would be indicative of a karyotype with three X chromosomes (e.g., 47,XXX syndrome or Triple X syndrome), which is not Klinefelter's syndrome. - This calculation follows the N-1 rule: 3 X chromosomes - 1 = 2 Barr bodies. *3* - **Three Barr bodies** would correspond to a karyotype with four X chromosomes (e.g., 48,XXXX), which is an even rarer sex chromosome aneuploidy not associated with Klinefelter's syndrome. - The N-1 rule applies: 4 X chromosomes - 1 = 3 Barr bodies. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Genetic Disorders, pp. 173-174.

Q: Which of the following testicular tumours is NOT a germ cell tumour?

Sertoli cell tumour. ***Sertoli cell tumour*** - This is a **sex-cord stromal tumour**, not a germ cell tumour, hence it does not arise from germ cells. - Sertoli cell tumours typically present with abnormal hormone levels, but not the classic germ cell tumour markers. *Choriocarcinoma* - This is a **germ cell tumour** that is aggressive and associated with high levels of **beta-hCG** [1][2]. - It derives from the placental tissue and is characterized by **trophoblastic differentiation** [2]. *Seminoma* - A well-known type of **germ cell tumour**, often presenting as a **homogeneous testicular mass** [1]. - It usually manifests with elevated **LDH** and is associated with a more favorable prognosis compared to non-seminomatous germ cell tumours [1]. *Teratoma* - Teratomas are also classified as **germ cell tumours**, containing differentiated tissues like hair, muscle, and bone [1][2]. - They can be **mature** (benign) or **immature** (malignant), and are typically found in younger patients [2][3]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lower Urinary Tract and Male Genital System, pp. 979-980. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lower Urinary Tract and Male Genital System, pp. 982-983. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 512-513.

Q: Which viral proteins are known to act as carcinogens in causing carcinoma cervix?

E - gene. ***E - gene*** - The **E - gene** in human papillomavirus (HPV) is known to play a crucial role in the **transformation of cervical cells**, leading to cancer development [1]. - Specifically, the **E6 and E7 proteins** encoded by this gene interfere with tumor suppressor functions, contributing to cervical carcinoma [1,2]. *L - gene* - The **L - gene** is associated with the virus's structural proteins, primarily aiding in the formation of the viral capsid. - It does not have a direct role in the oncogenic process leading to cervical cancer. *H - gene* - The **H - gene** is not specifically linked to the oncogenic effects of HPV; it is not recognized for contributing to cancer development. - It is often confused in discussions but doesn't directly influence the carcinogenic pathway like the E gene does. *P 24 - gene* - The **P 24 - gene** is not related to HPV; instead, it is associated with **HIV** and its structural components. - This gene does not play any role in the development of cervical carcinoma or transformation of cervical cells. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1006-1007. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 334-335.

Q: What is the appropriate time for semen examination post-ejaculation?

After 20-30 minutes of liquefaction. ***After 20-30 minutes of liquefaction*** - Semen should be analyzed after **liquefaction**, which typically occurs within 20-30 minutes. This allows for accurate assessment of sperm motility and concentration. - **Liquefaction** is the process where the seminal coagulum (gel-like state) breaks down into a liquid form, enabling sperm to move freely. *Immediately after ejaculation* - Analysis immediately after ejaculation is not appropriate because the semen is still in a **coagulated, gel-like state**, which impedes sperm motility assessment. - In this state, sperm are not freely motile, making it difficult to accurately count them or assess their movement. *Within 1.5 to 2 hours after ejaculation* - While liquefaction should have occurred by this time, waiting this long may lead to a decrease in **sperm motility** due to energy depletion and environmental factors. - Prolonged waiting can also affect the integrity of sperm, potentially leading to inaccurate results for other parameters. *More than 2 hours after ejaculation* - An analysis performed more than 2 hours after ejaculation would likely show significantly **reduced sperm viability and motility**, leading to an underestimation of fertility potential. - Beyond this timeframe, the sample may also be susceptible to **bacterial contamination** and changes in pH, further compromising the accuracy of the results.

Q: Which condition is characterized by androgenesis (purely paternal genetic origin)?

Androgenic complete mole. ***Androgenic complete mole*** - A **complete hydatidiform mole** is characterized by the absence of maternal genetic material and a **purely paternal genetic origin** (androgenesis). - This typically results from the **fertilization of an 'empty' egg** by either two haploid sperm or one diploid sperm. *Turner's syndrome* - This condition is a **chromosomal disorder** in females where one of the two X chromosomes is missing or incomplete (45, X0). - It is not associated with androgenesis but rather with the **absence of a functionally complete X chromosome**. *Polycystic ovary syndrome (PCOS)* - PCOS is an **endocrine disorder** characterized by **hormonal imbalance** (high androgens), ovulatory dysfunction, and polycystic ovaries. - It involves maternal and paternal genetic contributions in a normal diploid set and is not related to androgenesis. *Androgenic partial mole* - A **partial hydatidiform mole** typically involves **triploidy**, where there are two sets of paternal chromosomes and one set of maternal chromosomes (e.g., 69, XXX or 69, XXY). - While it involves extra paternal genetic material, it is not purely paternal in origin, as a **maternal haploid set is also present**.

Q: Which of the following conditions is associated with male pseudohermaphroditism?

5-alpha reductase deficiency. ***5-alpha reductase deficiency*** - This deficiency prevents the conversion of **testosterone into dihydrotestosterone (DHT)**, which is essential for external male genitalia development. - Individuals with XY chromosomes are born with **ambiguous genitalia** that may appear female-like, leading to male pseudohermaphroditism. *21-hydroxylase deficiency* - This is the most common cause of **congenital adrenal hyperplasia (CAH)**, leading to overproduction of androgens. [1] - In XX individuals, it causes **virilization**, resulting in female pseudohermaphroditism, not male. [1] *17-hydroxylase deficiency* - This leads to impaired synthesis of **cortisol and sex steroids**, thus affecting adrenal and gonadal functions. [1] - XY individuals with this deficiency typically present with **female external genitalia** due to a lack of androgens, but it's a different mechanism than 5-alpha reductase deficiency. [1] *Androgen insensitivity syndrome* - In this condition, individuals with XY chromosomes have **non-functional androgen receptors**, making their bodies unable to respond to testosterone. [1] - They develop **female external genitalia** despite having testes and usually present as phenotypic females. [1]

Q: Which of the following is not a germ cell tumor?

Leydig cell tumor. ***Leydig cell tumor*** - Leydig cell tumors are classified as **sex-cord stromal tumors**, not germ cell tumors [1]. - These tumors are derived from **Leydig cells** which produce androgens, affecting the endocrine function rather than germ cell lineage [1]. *Endodermal sinus* - Endodermal sinus tumors, or **yolk sac tumors**, are indeed germ cell tumors characterized by **alpha-fetoprotein (AFP)** production [2]. - They typically arise in the testis or ovaries and are known for rapid growth and aggressiveness. *Embryonal carcinoma* - Embryonal carcinoma is a type of **germ cell tumor** commonly associated with elevated levels of **beta-hCG** [2]. - It primarily affects the testes in males and can occur in the ovaries, and it is known for its aggressive behavior. *Seminoma* - Seminomas are classic examples of **germ cell tumors**, noted for their sensitivity to radiation and chemotherapy [3]. - They usually present with **increased beta-hCG** levels and can coexist with non-seminomatous germ cell tumors [3]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 510-514. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lower Urinary Tract and Male Genital System, pp. 979-980. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lower Urinary Tract and Male Genital System, pp. 980-982.

Q: What is the most common type of degeneration observed in uterine fibroids?

Hyaline. ***Hyaline*** - **Hyaline degeneration** is the most frequent type of degeneration in uterine fibroids, occurring in about **60% of cases** [1]. - It involves the replacement of smooth muscle and connective tissue with **acellular, glassy, eosinophilic hyaline material** [1]. *Calcareous* - **Calcareous degeneration** (calcification) occurs when hyaline degeneration calcifies, typically seen in **postmenopausal women** or older fibroids. - While it can occur, it is a **secondary change** following hyaline degeneration rather than the primary and most common form. *Red* - **Red degeneration** (carneous degeneration) is acute, often occurring during **pregnancy** due to rapid growth and hemorrhagic infarction. - It presents with **acute pain** and is less common than hyaline degeneration. *Cystic* - **Cystic degeneration** is characterized by liquefaction within the fibroid, leading to the formation of **cysts**. - This typically results from advanced **hyaline degeneration** and is less common than hyaline degeneration itself. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1024-1025.

Question 1

Identify the type of testicular cancer represented in the image.

Accepted Answer

Seminoma

Answer

Germ cell tumor

Answer

Teratoma (a type of germ cell tumor)

Answer

Non-seminomatous germ cell tumor

Question 2

What is the number of Barr bodies present in Klinefelter's syndrome?

Accepted Answer

1

Answer

0

Answer

2

Answer

3

Question 3

Which of the following testicular tumours is NOT a germ cell tumour?

Accepted Answer

Sertoli cell tumour

Answer

Seminoma

Answer

Teratoma

Answer

Choriocarcinoma

Question 4

Which viral proteins are known to act as carcinogens in causing carcinoma cervix?

Accepted Answer

E - gene

Answer

P 24 - gene

Answer

L - gene

Answer

H - gene

Question 5

What is the appropriate time for semen examination post-ejaculation?

Accepted Answer

After 20-30 minutes of liquefaction

Answer

More than 2 hours after ejaculation

Answer

Within 1.5 to 2 hours after ejaculation

Answer

Immediately after ejaculation

Question 6

Which condition is characterized by androgenesis (purely paternal genetic origin)?

Accepted Answer

Androgenic complete mole

Answer

Turner's syndrome

Answer

Polycystic ovary syndrome (PCOS)

Answer

Androgenic partial mole

Question 7

What is Reifenstein syndrome?

Accepted Answer

Partial androgen insensitivity syndrome due to receptor mutation.

Answer

Complete androgen insensitivity syndrome with female external genitalia

Answer

5-alpha reductase deficiency causing ambiguous genitalia

Answer

Gonadal dysgenesis with streak gonads

Question 8

Which of the following conditions is associated with male pseudohermaphroditism?

Accepted Answer

5-alpha reductase deficiency

Answer

21-hydroxylase deficiency

Answer

Androgen insensitivity syndrome

Answer

17-hydroxylase deficiency

Question 9

Which of the following is not a germ cell tumor?

Accepted Answer

Leydig cell tumor

Answer

Embryonal carcinoma

Answer

Endodermal sinus

Answer

Seminoma

Question 10

What is the most common type of degeneration observed in uterine fibroids?

Accepted Answer

Hyaline

Answer

Calcareous

Answer

Red

Answer

Cystic

Reproductive Pathology — MCQs

Reproductive Pathology — MCQs

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