Reproductive Pathology — MCQs

Reproductive Pathology Indian Medical PG Practice Questions and MCQs

Question 151: Paget's disease of the nipple is classified as which of the following?

A. Infection
B. Dermatitis
C. Neoplasia (Correct Answer)
D. Hypopigmentation

Explanation: **Paget’s disease of the nipple** is classified as a **neoplasia** because it represents an extension of an underlying breast malignancy [1]. Specifically, it occurs when malignant cells (Paget cells) from a **Ductal Carcinoma in Situ (DCIS)** or an invasive ductal carcinoma migrate through the lactiferous ducts into the epidermis of the nipple and areola [1], [2]. These cells disrupt the epithelial barrier, leading to the characteristic clinical presentation [1]. **Why other options are incorrect:** * **Infection:** While the lesion may appear crusty or oozing, it is not caused by bacteria, fungi, or viruses. Unlike mastitis, it does not respond to antibiotics. * **Dermatitis:** Paget’s disease is frequently misdiagnosed as eczema (dermatitis). However, a key clinical differentiator is that Paget’s disease typically involves the **nipple first** and then spreads to the areola, whereas eczematous dermatitis usually involves the areola and spares the nipple. * **Hypopigmentation:** The condition typically presents as an erythematous, scaly, or eczematous plaque; it does not primarily involve a loss of melanin. **High-Yield Clinical Pearls for NEET-PG:** * **Histology:** Characterized by **Paget cells**—large, pale cells with abundant granular cytoplasm and prominent nucleoli, located within the squamous epithelium [1], [2]. * **Staining:** Paget cells are **PAS positive** (diastase resistant) because they contain mucin, which helps differentiate them from melanoma (S100 positive). * **Association:** Almost 100% of cases are associated with an underlying breast carcinoma (most commonly DCIS) [1], [2]. * **Clinical Sign:** Any "eczema" of the nipple that does not heal with topical steroids must be biopsied to rule out Paget’s disease. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1061-1062. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 456-457.

Question 152: A patient with chronic pelvic pain undergoes a hysterectomy. The resected uterus is filled with nodules composed of benign smooth muscle cells. Which of the following terms best describes these nodules?

A. Angiosarcoma
B. Leiomyoma (Correct Answer)
C. Leiomyosarcoma
D. Rhabdomyoma

Explanation: ### **Explanation** **Correct Answer: B. Leiomyoma** **Concept:** The question describes a common benign tumor of the uterus. In pathology, the suffix **"-oma"** denotes a benign neoplasm, while the prefix **"leiomyo-"** refers to smooth muscle. Since the uterus is primarily composed of smooth muscle (myometrium) and the nodules are described as **benign**, the correct term is **Leiomyoma** (commonly known as fibroids) [1]. These are the most common tumors in women of reproductive age. **Analysis of Incorrect Options:** * **A. Angiosarcoma:** This is a highly malignant neoplasm arising from vascular endothelial cells (blood vessels), not smooth muscle. * **C. Leiomyosarcoma:** The suffix **"-sarcoma"** indicates a malignant tumor of mesenchymal origin. While it arises from smooth muscle, the question explicitly states the cells are "benign." Note: Leiomyosarcomas typically arise *de novo*, not from pre-existing leiomyomas [1]. * **D. Rhabdomyoma:** The prefix **"rhabdomyo-"** refers to striated (skeletal or cardiac) muscle. These are rare in the uterus and are more commonly associated with the heart (e.g., in Tuberous Sclerosis). **Clinical Pearls for NEET-PG:** * **Gross Appearance:** Classically described as firm, grey-white, **whorled** (bundles of smooth muscle) nodules with a distinct "pseudo-capsule" [1]. * **Estrogen Dependency:** They are sensitive to estrogen; they often enlarge during pregnancy and shrink after menopause. * **Microscopy:** Characterized by bundles of spindle-shaped smooth muscle cells with "cigar-shaped" nuclei and minimal mitotic activity. * **Key Distinction:** Unlike Leiomyomas, **Leiomyosarcomas** show nuclear atypia, high mitotic index, and **zonal necrosis** [1]. **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 153: Vaginal adenocarcinomas in children are caused by what?

A. Virus
B. Administration of diethylstilbestrol (DES) to pregnant mothers (Correct Answer)
C. Hormonal changes
D. All of the above

Explanation: **Explanation:** The correct answer is **B. Administration of diethylstilbestrol (DES) to pregnant mothers.** **Medical Concept:** Vaginal adenocarcinomas in children and young women, specifically the **Clear Cell Adenocarcinoma** subtype, are classically associated with *in utero* exposure to Diethylstilbestrol (DES) [1]. DES was a synthetic nonsteroidal estrogen prescribed to pregnant women between the 1940s and 1970s to prevent miscarriages [1]. Exposure interferes with the normal transformation of the Müllerian epithelium into squamous epithelium in the fetal vagina, leading to **Vaginal Adenosis** (persistence of glandular columnar epithelium). This adenosis serves as the precursor lesion from which clear cell adenocarcinoma develops in a small percentage (approx. 0.1%) of exposed daughters. **Analysis of Incorrect Options:** * **A. Virus:** While Human Papillomavirus (HPV) is the primary cause of Vaginal Squamous Cell Carcinoma (usually in older women), it is not linked to clear cell adenocarcinoma in children [2]. * **C. Hormonal Changes:** Endogenous hormonal fluctuations during puberty may influence the timing of presentation, but they are not the primary etiological trigger for this specific childhood malignancy. * **D. All of the above:** Incorrect, as the etiology is specifically linked to exogenous chemical exposure (DES). **High-Yield NEET-PG Pearls:** * **Classic Presentation:** A young female (mean age 19) presenting with abnormal vaginal bleeding [1]. * **Location:** Most commonly involves the **upper third of the anterior vaginal wall**. * **Histology:** Characterized by "Hobnail cells" (cells with bulbous nuclei protruding into the lumen). * **Other DES Complications:** Exposed daughters may also show a **T-shaped uterus**, cervical hoods, and increased risk of ectopic pregnancy or infertility. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 223-224. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1004-1005.

Question 154: What is true about Yolk sac tumors?

A. Also called endodermal sinus tumor.
B. Always have elevated AFP levels.
C. Schiller-Duval bodies are seen, and they are highly malignant.
D. All of the above. (Correct Answer)

Explanation: **Explanation:** Yolk Sac Tumor (YST), also known as **Endodermal Sinus Tumor**, is the most common germ cell tumor in infants and children (typically under 3 years of age) [1]. In adults, it is frequently seen as a component of mixed germ cell tumors [2]. * **Option A:** It is histologically characterized by structures resembling the primitive yolk sac or the **endodermal sinus** of the rat placenta, hence the synonym. * **Option B:** YST is a highly vascular and aggressive tumor that characteristically produces **Alpha-Fetoprotein (AFP)**. Serum AFP levels are a sensitive marker for diagnosis, monitoring treatment response, and detecting recurrence. * **Option C:** The pathognomonic histological feature is the **Schiller-Duval body**. This consists of a central blood vessel surrounded by germ cells, situated within a space lined by flattened cells (resembling a primitive glomerulus). Clinically, these tumors are **highly malignant** and aggressive but respond well to chemotherapy (e.g., BEP regimen). **High-Yield Clinical Pearls for NEET-PG:** * **Microscopic appearance:** Apart from Schiller-Duval bodies, look for **eosinophilic hyaline droplets** (containing AFP and Alpha-1-antitrypsin). * **Immunohistochemistry (IHC):** Positive for **AFP** and **Glypican-3**. * **Age Distribution:** Pure YST is common in children (good prognosis); mixed YST is common in adults (worse prognosis) [1]. * **Gross Appearance:** Large, non-encapsulated, multicystic mass with areas of hemorrhage and necrosis. **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 Female Genital Tract, pp. 1035-1036.

Question 155: What is the tumor marker for seminoma of the testis?

A. Alpha-fetoprotein
B. Carcinoembryonic antigen
C. Alpha HCG
D. Lactate dehydrogenase (Correct Answer)

Explanation: **Explanation:** **Seminoma** is the most common germ cell tumor (GCT) of the testis. Understanding its marker profile is crucial for diagnosis and monitoring. 1. **Why Lactate Dehydrogenase (LDH) is correct:** LDH is a non-specific but clinically significant marker for seminomas. Its levels correlate directly with the **tumor burden**, growth rate, and degree of tissue breakdown. While not specific enough for primary diagnosis, it is the most frequently elevated marker in pure seminomas and is used for staging and monitoring treatment response. 2. **Analysis of Incorrect Options:** * **Alpha-fetoprotein (AFP):** This is the hallmark marker for Yolk Sac Tumors. **Crucial Point:** A "pure" seminoma *never* produces AFP. If AFP is elevated in a suspected seminoma, it indicates a mixed germ cell tumor (usually containing a yolk sac component) [1]. * **Carcinoembryonic antigen (CEA):** This is primarily a marker for colorectal, pancreatic, and gastric carcinomas. It has no clinical utility in testicular germ cell tumors. * **Alpha HCG:** This is a distractor. The relevant marker is **Beta-hCG**. While ~15% of seminomas containing syncytiotrophoblastic giant cells can show elevated Beta-hCG, it is not as consistently associated with pure seminoma as LDH is in the context of this question's options [1]. **High-Yield Clinical Pearls for NEET-PG:** * **The "Rule of 100%":** AFP is elevated in 100% of Yolk Sac Tumors; Beta-hCG is elevated in 100% of Choriocarcinomas [2]. * **Most Sensitive Marker:** For seminoma, **Placental Alkaline Phosphatase (PLAP)** is a highly sensitive immunohistochemical marker, though not always used as a serum marker [1]. * **Microscopy:** Look for "Fried egg appearance" (clear cytoplasm, central nuclei) and fibrous septa infiltrated with **T-cell lymphocytes**. * **Prognosis:** Seminomas are highly radiosensitive and have an excellent 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. 979-982. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1035-1036.

Question 156: Which of the following is not a marker of seminoma?

A. PLAP
B. Alpha fetoprotein (Correct Answer)
C. Beta HCG
D. LDH

Explanation: **Explanation:** The correct answer is **Alpha-fetoprotein (AFP)**. In testicular pathology, the presence of elevated AFP is a definitive exclusion criterion for a diagnosis of pure seminoma. **Why AFP is the correct answer:** AFP is the hallmark tumor marker for **Yolk Sac Tumors**. While seminomas are the most common germ cell tumors, they **never** produce AFP. If a patient with a suspected seminoma shows elevated AFP levels, it indicates the presence of a non-seminomatous component (usually Yolk Sac or Embryonal carcinoma), and the tumor must be managed as a **Mixed Germ Cell Tumor**. **Analysis of other options:** * **PLAP (Placental-like Alkaline Phosphatase):** This is a highly sensitive membrane marker for seminoma [1]. It is positive in nearly 95-100% of cases and is used immunohistochemically to confirm the diagnosis [1]. * **Beta-HCG:** Approximately 10–15% of pure seminomas contain **syncytiotrophoblastic giant cells**, which secrete HCG [1], [2]. While levels are typically lower than those seen in Choriocarcinoma, a mild elevation does not exclude a seminoma [1]. * **LDH (Lactate Dehydrogenase):** This is a non-specific marker used to assess **tumor burden** and growth rate in seminomas. It is useful for monitoring treatment response and recurrence. **High-Yield Clinical Pearls for NEET-PG:** * **Most common marker:** PLAP is the most sensitive IHC marker for seminoma [1]. * **Most specific marker:** OCT3/4 and NANOG are highly specific nuclear markers [1]. * **The "Rule of AFP":** Seminoma = AFP Negative. Yolk Sac Tumor = AFP Positive. * **Radiosensitivity:** Seminomas are highly radiosensitive and have an excellent prognosis compared to non-seminomatous germ cell tumors (NSGCTs). **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. 980-982. [2] 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.

Question 157: Sarcoma botryoides is also known as?

A. Embryonal Rhabdomyosarcoma (Correct Answer)
B. Alveolar Rhabdomyosarcoma
C. Leiomyosarcoma
D. Lipoblastomatosis

Explanation: ### Explanation **Correct Option: A. Embryonal Rhabdomyosarcoma** Sarcoma botryoides is a specific variant of **Embryonal Rhabdomyosarcoma (ERMS)** [1]. The name "botryoides" is derived from the Greek word *botrys* (cluster of grapes), reflecting its characteristic gross appearance as soft, polypoid, grape-like masses protruding from a mucosal surface. It typically arises in hollow, epithelial-lined structures such as the **vagina** (in infants/children under 5 years) or the **urinary bladder** [1]. **Analysis of Incorrect Options:** * **B. Alveolar Rhabdomyosarcoma:** This is a more aggressive subtype of rhabdomyosarcoma usually seen in adolescents and young adults, involving the deep muscles of the extremities. It is characterized by the $t(2;13)$ or $t(1;13)$ translocation and does not present with the "grape-like" botryoid morphology. * **C. Leiomyosarcoma:** This is a malignant tumor of smooth muscle origin. In the female reproductive tract, it typically occurs in the uterus of postmenopausal women and presents as a bulky, fleshy mass, not as botryoid clusters in infants. * **D. Lipoblastomatosis:** This is a benign mesenchymal tumor of fetal white fat, usually occurring in the extremities or trunk of infants. It is unrelated to skeletal muscle (rhabdo-) differentiation. **High-Yield Clinical Pearls for NEET-PG:** * **Age Group:** Most common in children **< 5 years** of age [1]. * **Classic Presentation:** A young girl with a "grape-like" mass protruding from the vagina or blood-stained discharge. * **Hallmark Histology:** Presence of the **Cambium layer** (a dense zone of undifferentiated tumor cells immediately beneath the intact surface epithelium). * **Diagnostic Marker:** Presence of **Rhabdomyoblasts** (strap cells or tadpole cells) containing cross-striations. * **Immunohistochemistry (IHC):** Positive for **Desmin, Myogenin, and MyoD1**. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1004-1005.

Question 158: Blood chimerism is most likely to occur in which of the following types of twin pregnancies?

A. Monochorionic monozygotic twins
B. Monochorionic dizygotic twins (Correct Answer)
C. Dichorionic dizygotic twins
D. Singleton pregnancy

Explanation: ### Explanation **Concept Overview:** Blood chimerism occurs when an individual contains two or more genetically distinct populations of blood cells. In the context of twins, this happens via **intrauterine vascular anastomoses** (connections) between the two circulations, allowing the exchange of hematopoietic stem cells [1]. **Why Option B is Correct:** * **Monochorionic Dizygotic (MCDZ) Twins:** While rare in humans (often associated with assisted reproductive techniques), this is the classic scenario for chimerism. Because the twins share a single placenta (monochorionic), vascular shunts develop. Since they are dizygotic (fraternal), they are genetically different. The exchange of blood through these shunts leads to "persistent chimerism," where each twin carries a stable population of the other’s blood cells. **Why Other Options are Incorrect:** * **A. Monochorionic Monozygotic Twins:** While these twins share a placenta and have vascular anastomoses, they are genetically identical. Therefore, an exchange of blood does not result in chimerism because the cell populations are the same [1]. * **C. Dichorionic Dizygotic Twins:** These twins have separate placentas and separate circulatory systems. Without vascular connections, there is no exchange of hematopoietic cells, and thus no chimerism [1]. * **D. Singleton Pregnancy:** Chimerism requires a donor source of genetically different cells, which is absent in a standard singleton pregnancy (excluding rare microchimerism from maternal-fetal hemorrhage). **High-Yield Facts for NEET-PG:** * **Freemartinism:** A classic veterinary example of this phenomenon where a female calf born co-twin to a male becomes sterile due to the exchange of hormones and cells. * **Clinical Significance:** Blood chimerism can lead to discrepancies in **ABO blood grouping** (e.g., a person appearing to have two different blood types) or unexpected results in forensic DNA testing. * **Twin-to-Twin Transfusion Syndrome (TTTS):** This is a complication of monochorionic twins due to *unbalanced* vascular anastomoses, whereas chimerism refers to the *genetic* result of the exchange [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1040-1041.

Question 159: A female patient reports smoking 20 cigarettes a day. To which of the following conditions is she maximally predisposed?

A. Acute mastitis
B. Granulomatous mastitis
C. Fat necrosis
D. Squamous metaplasia of lactiferous ducts (Correct Answer)

Explanation: ### Explanation **Correct Option: D. Squamous metaplasia of lactiferous ducts** The strongest risk factor for **Squamous Metaplasia of Lactiferous Ducts (SMID)**, also known as **Zuska’s disease** or **Periductal Mastitis**, is cigarette smoking. [1] * **Mechanism:** Smoking causes a relative **Vitamin A deficiency** or direct toxic effects on the ductal epithelium. This triggers the normal double-layered cuboidal epithelium of the lactiferous ducts to undergo **squamous metaplasia**. * **Pathogenesis:** The keratin produced by the metaplastic squamous cells plugs the duct, leading to dilation and eventual rupture [1]. This causes a chronic granulomatous inflammatory response to the spilled keratin, often presenting as a painful subareolar mass or a recurrent "recurrent subareolar abscess." --- ### Why other options are incorrect: * **A. Acute mastitis:** Usually occurs during the first few weeks of breastfeeding (lactational mastitis) due to *Staphylococcus aureus* entering through cracks in the nipple. It is not specifically linked to smoking. * **B. Granulomatous mastitis:** This is an idiopathic condition (Idiopathic Granulomatous Mastitis) or associated with systemic diseases like Sarcoidosis or Tuberculosis. It typically affects parous women and is not primarily driven by smoking. * **C. Fat necrosis:** This is almost always secondary to **trauma** or prior surgery to the breast. It presents as a painless, firm mass and is unrelated to smoking habits. --- ### High-Yield Clinical Pearls for NEET-PG: * **Zuska’s Disease:** Always look for the triad of **Smoking + Subareolar Mass + Squamous Metaplasia**. * **Morphology:** Histology shows keratin-plugged ducts and a periductal chronic inflammatory infiltrate [1]. * **Management:** It is notoriously difficult to treat; simple incision and drainage often lead to recurrence [1]. Complete excision of the affected duct and the associated fistula tract is usually required. [1] * **Differential:** Do not confuse this with Mammary Duct Ectasia, which typically occurs in older, multiparous women and is characterized by thick, "cheesy" nipple discharge. [1] **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1050-1052.

Question 160: A Krukenberg tumor originates from which of the following?

A. Liver
B. Stomach (Correct Answer)
C. Ovary
D. Gallbladder

Explanation: **Explanation:** A **Krukenberg tumor** is a specific type of metastatic signet-ring cell carcinoma of the ovary. The defining feature of this tumor is that it is **secondary** (metastatic) rather than primary. 1. **Why Stomach is Correct:** The most common primary site of origin for a Krukenberg tumor is the **Stomach** (specifically gastric adenocarcinoma). The cancer cells typically spread via retrograde lymphatic dissemination or transcoelomic seeding to involve both ovaries [1]. Histologically, these tumors are characterized by **signet-ring cells** (mucin-filled cells that displace the nucleus to the periphery) within a cellular spindle cell stroma [1]. 2. **Why Incorrect Options are Wrong:** * **Ovary:** While the tumor is *located* in the ovary, it does not *originate* there. A primary ovarian signet-ring cell carcinoma is extremely rare; by definition, a Krukenberg tumor refers to the metastatic form. * **Liver & Gallbladder:** While these are GI-related organs, they are rare primary sites for Krukenberg tumors. After the stomach, the next most common sites are the colon, appendix, and breast. **High-Yield Clinical Pearls for NEET-PG:** * **Bilateral Involvement:** Krukenberg tumors are classically **bilateral** (80% of cases). If a signet-ring tumor is unilateral, clinicians should investigate for a primary ovarian origin. * **Histology:** Look for the "Signet-ring" appearance (PAS positive mucin) [1]. * **Route of Spread:** Though traditionally thought to be transcoelomic (seeding across the peritoneal cavity), **retrograde lymphatic spread** is now considered the most likely pathway. * **Sister Mary Joseph Nodule:** Often associated with the same primary (gastric cancer), referring to metastasis to the umbilicus. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, p. 779.

Practice by Chapter

Diseases of Male Genital Tract

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Testicular Tumors

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Prostate Pathology

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Diseases of Female Genital Tract

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Cervical Pathology and Neoplasia

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Endometrial Pathology

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Ovarian Diseases and Tumors

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Gestational Trophoblastic Disease

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Placental Pathology

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Sexually Transmitted Infections

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