Reproductive Pathology Practice Questions

Q: What is the most common type of penile carcinoma?

Squamous cell carcinoma. ***Squamous cell carcinoma*** - This is by far the most common type, accounting for over **95% of all penile cancers** [1]. - It arises from the **epithelial cells** of the penis, particularly the glans or inner foreskin [2]. *Basal cell carcinoma* - While it is a common skin cancer, **basal cell carcinoma is extremely rare on the penis**, accounting for less than 1% of cases. - It usually presents as a **slow-growing papule or nodule** with rolled borders on sun-exposed skin [3]. *Adenocarcinoma* - This type of cancer originates from **glandular tissue**, which is not the predominant tissue type in the penile shaft or glans. - Adenocarcinoma of the penis is exceptionally rare, usually associated with **Paget's disease** of the glans or urethra. *Small cell carcinoma* - Small cell carcinoma is a highly aggressive neuroendocrine tumor, most commonly found in the **lungs**. - Its occurrence in the penis is **extremely rare** and carries a very poor prognosis. **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. 975-976. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 505-506. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Disorders Involving Inflammatory And Haemopoietic Cells, pp. 643-644.

Q: In which condition are Call-Exner bodies seen?

Granulosa cell tumors. ***Granulosa cell tumors*** - **Call Exner bodies** are characteristic of granulosa cell tumors, usually appearing as small, round structures resembling immature Graafian follicles [1]. - These tumors produce **estrogens**, leading to symptoms like abnormal uterine bleeding due to endometrial hyperplasia [1]. *Dysgerminoma* - Dysgerminoma typically features **solid, homogeneous tissue** and does not form Call Exner bodies. - It is more common in **younger women** and usually associated with elevated **LDH levels**. *Serous cystadenomas* - These tumors are generally **cystic** and do not exhibit Call Exner bodies, focusing instead on serous fluid production. - They are one of the most common types of ovarian tumors but lack the characteristic features of granulosa cell tumors. *Krukenberg tumor* - Krukenberg tumors are metastatic lesions of the ovaries, often resulting from **gastric carcinoma** and do not produce Call Exner bodies. - They typically present with **bilateral ovarian masses** and may be associated with **mucin-secreting histology**. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1036-1037.

Q: What is the risk of malignancy associated with duct ectasia?

No risk of malignancy. ***No risk of malignancy*** - **Duct ectasia** is characterized by the dilation of subareolar ducts and is a **benign condition** with no direct association with an increased risk of developing breast cancer [1]. - While it can present with clinical symptoms that *mimic* breast cancer, such as nipple discharge or a palpable mass, it is not considered a **premalignant lesion** [1]. *1.5% risk of malignancy* - This value is not recognized as a typical risk for malignancy associated with duct ectasia; it may be applicable to other benign breast conditions. - Many benign conditions have varying degrees of malignancy risk, but duct ectasia itself is **not one of them** [1]. *7% risk of malignancy* - This percentage is significantly higher than any established risk for malignancy in benign duct ectasia. - This value is not appropriate for a condition that is considered entirely **benign**. *10% risk of malignancy* - A 10% risk would indicate a substantial predisposition to cancer, which is not characteristic of duct ectasia. - This figure might be more relevant to **atypical hyperplasias** or other high-risk breast lesions. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, p. 1052.

Q: Which karyotype is associated with true hermaphroditism?

46 XX/46 XY (Mosaic). ***46 XX/46 XY (Mosaic)*** - **True hermaphroditism** (now often called **ovotesticular disorder of sex development**) is characterized by the presence of both **ovarian and testicular tissue** in the same individual. - A **mosaic karyotype** such as **46 XX/46 XY** allows for the development of both types of gonadal tissue, as different cell lines with different sex chromosomes are present [1]. *45 X0 streaked gonads* - This karyotype is characteristic of **Turner syndrome**, which presents with **gonadal dysgenesis** (streaked gonads) and lacks functional ovarian or testicular tissue [2]. - Individuals with Turner syndrome are typically female in appearance but infertile due to the absence of a second X chromosome [2]. *46 XY (Testicular tissue only)* - While a **46 XY karyotype** typically leads to the development of **testicular tissue**, the presence of testicular tissue *only* does not constitute true hermaphroditism [3]. - This karyotype is associated with male sexual development, though variations can occur in disorders of sex development affecting testosterone synthesis or androgen insensitivity. *46 XX* - A **46 XX karyotype** typically leads to **female development** with the presence of ovarian tissue. - While **46 XX males** can occur due to translocation of the SRY gene, this does not result in true hermaphroditism (presence of both ovarian and testicular tissue). **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Genetic Disorders, pp. 168-169. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Genetic Disorders, pp. 175-177. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Genetic Disorders, pp. 167-168.

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: 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: 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 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.

Q: What condition is the Lendrum stain primarily used to diagnose?

Amniotic fluid embolism. ***Amniotic fluid embolism*** - The **Lendrum stain** (specifically the modified Lendrum stain) is used to detect **fetal squamous cells** and **mucin** in maternal lung tissue, which are markers for amniotic fluid embolism [1]. - It helps confirm the diagnosis of this rare but severe obstetric emergency characterized by the entry of **amniotic fluid** into the maternal circulation [1]. *Air embolism* - Air embolism is diagnosed based on the presence of **gas bubbles** in blood vessels, often visualized by imaging or directly during autopsy, not by a specific tissue stain [1]. - Histologically, air emboli lead to characteristic foam-like structures in vascular lumens, but no specific stain highlights the air itself. *Fat embolism* - Fat embolism is diagnosed by the presence of **fat globules** in pulmonary capillaries and other organs, typically stained with **oil-soluble dyes like Oil Red O** or Sudan stains on frozen sections. - The Lendrum stain is designed for mucin and keratin, not neutral lipids like fat. *Thromboembolism* - Thromboembolism involves **blood clots** that occlude vessels and is diagnosed using routine H&E staining, which shows fibrin, platelets, and red blood cells [1]. - Special stains like **phosphotungstic acid-hematoxylin (PTAH)** or **Martius scarlet blue (MSB)** may be used for fibrin, but the Lendrum stain is specifically designed for amniotic fluid components, not thrombi. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Respiratory Tract Disease, pp. 323-324.

Question 1

What is the most common type of penile carcinoma?

Accepted Answer

Squamous cell carcinoma

Answer

Basal cell carcinoma

Answer

Adenocarcinoma

Answer

Small cell carcinoma

Question 2

In which condition are Call-Exner bodies seen?

Accepted Answer

Granulosa cell tumors

Answer

Serous cystadenomas

Answer

Dysgerminoma

Answer

Krukenberg tumor

Question 3

What is the risk of malignancy associated with duct ectasia?

Accepted Answer

No risk of malignancy

Answer

1.5% risk of malignancy

Answer

7% risk of malignancy

Answer

10% risk of malignancy

Question 4

Which karyotype is associated with true hermaphroditism?

Accepted Answer

46 XX/46 XY (Mosaic)

Answer

45 X0 streaked gonads

Answer

46 XY (Testicular tissue only)

Answer

46 XX

Question 5

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

Accepted Answer

Sertoli cell tumour

Answer

Seminoma

Answer

Teratoma

Answer

Choriocarcinoma

Question 6

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

Accepted Answer

1

Answer

0

Answer

2

Answer

3

Question 7

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 8

Which of the following is not a germ cell tumor?

Accepted Answer

Leydig cell tumor

Answer

Embryonal carcinoma

Answer

Endodermal sinus

Answer

Seminoma

Question 9

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

Accepted Answer

Hyaline

Answer

Calcareous

Answer

Red

Answer

Cystic

Question 10

What condition is the Lendrum stain primarily used to diagnose?

Accepted Answer

Amniotic fluid embolism

Answer

Air embolism

Answer

Fat embolism

Answer

Thromboembolism

Reproductive Pathology — MCQs

Reproductive Pathology — MCQs

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