Reproductive Pathology — MCQs

Reproductive Pathology Indian Medical PG Practice Questions and MCQs

Question 21: Signet-ring cells are characteristically found in which type of breast cancer?

A. Papillary carcinoma
B. Tubular carcinoma
C. Invasive ductal carcinoma
D. Invasive lobular carcinoma (Correct Answer)

Explanation: **Explanation:** **1. Why Invasive Lobular Carcinoma (ILC) is correct:** Invasive Lobular Carcinoma is characterized by the loss of **E-cadherin** expression (due to mutations in the *CDH1* gene), which leads to a lack of cell cohesion. Histologically, cells typically present in a "single-file" or "indian-file" pattern [1]. A specific morphological variant of ILC contains **Signet-ring cells** [1]. These cells appear when intracellular mucin vacuoles push the nucleus to the periphery, creating a ring-like appearance. This is a high-yield diagnostic feature for the lobular subtype. **2. Why the other options are incorrect:** * **Papillary Carcinoma:** Characterized by fibrovascular cores lined by neoplastic epithelium. It does not typically feature signet-ring morphology. * **Tubular Carcinoma:** Defined by well-formed, angulated tubules (at least 90% of the tumor) lined by a single layer of cells. It is a low-grade tumor with an excellent prognosis. * **Invasive Ductal Carcinoma (IDC):** This is the most common type of breast cancer. While it can show various patterns (nests, cords, or sheets), the classic signet-ring morphology is a hallmark of the lobular variant, not the ductal type [1]. **3. NEET-PG High-Yield Pearls:** * **E-cadherin:** Negative in Lobular carcinoma; Positive in Ductal carcinoma. * **Bilateralism/Multicentricity:** ILC has a higher tendency to be bilateral and multicentric compared to IDC [1]. * **Metastasis:** ILC has a unique metastatic pattern, often spreading to the peritoneum, leptomeninges, and ovaries (Krukenberg tumor). * **Signet-ring cells elsewhere:** Always remember that signet-ring cells are also characteristic of **Gastric Carcinoma** (Diffuse type) [2]. If found in the ovary, consider a Krukenberg tumor (metastatic from the GI tract or breast). **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 454-455. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, p. 779.

Question 22: In Pseudomyxoma Peritonei, mucinous cyst adenocarcinoma most commonly arises from which of the following organs?

A. Pancreas
B. Kidney
C. Ovary (Correct Answer)
D. Abdominal testis

Explanation: **Explanation:** **Pseudomyxoma Peritonei (PMP)** is a clinical syndrome characterized by the accumulation of abundant "jelly-like" mucinous ascites within the peritoneal cavity [1]. It typically results from the rupture or leakage of a mucinous tumor. **Why Ovary is the Correct Answer:** In the context of traditional medical teaching and NEET-PG examinations, the **Ovary** is historically recognized as a primary site for mucinous cystadenocarcinomas leading to PMP. While modern pathology indicates that the **Appendix** is actually the most common primary source (often metastasizing to the ovary first) [2], among the options provided, the ovary is the established site for mucinous tumors that can disseminate throughout the peritoneum. **Analysis of Incorrect Options:** * **A. Pancreas:** While the pancreas can develop mucinous cystic neoplasms, they rarely lead to the classic presentation of PMP compared to appendiceal or ovarian origins. * **B. Kidney:** Renal tumors (like Renal Cell Carcinoma) do not produce mucin and do not cause Pseudomyxoma Peritonei. * **D. Abdominal Testis:** This is associated with germ cell tumors (like Seminoma), not mucin-secreting adenocarcinomas. **High-Yield Clinical Pearls for NEET-PG:** * **The "Jelly Belly":** A classic descriptive term for the gross appearance of the abdomen in PMP. * **Primary Source:** If "Appendix" is an option, it is now considered the most common primary source of PMP [1]. If not listed, the Ovary is the next best answer. * **Treatment:** Often involves **Cytoreductive Surgery (CRS)** combined with **HIPEC** (Hyperthermic Intraperitoneal Chemotherapy). * **Histology:** Look for "pools of extracellular mucin" containing sparse malignant epithelial cells. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 823-824. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Female Genital Tract Disease, pp. 478-480.

Question 23: Pseudomyxoma peritonei most commonly occurs in association with which of the following conditions?

A. Mucinous cystadenocarcinoma of the ovary (Correct Answer)
B. Carcinoma of the endometrium
C. Ovarian dermoid
D. Fibroid uterus

Explanation: **Explanation:** **Pseudomyxoma peritonei** is a clinical condition characterized by the accumulation of abundant gelatinous, mucinous material within the peritoneal cavity, often referred to as "jelly belly" [1]. 1. **Why Option A is Correct:** The condition is most frequently associated with **mucinous tumors**. While historically linked to **mucinous cystadenocarcinoma of the ovary**, modern pathology recognizes that the primary source is often a low-grade appendiceal mucinous neoplasm (LAMN) that has metastasized to the ovaries and peritoneum [2]. However, in the context of classic medical examinations like NEET-PG, mucinous cystadenocarcinoma of the ovary remains the standard textbook association for this condition. The tumor cells implant on peritoneal surfaces and continue to secrete large amounts of mucin [1]. 2. **Why Other Options are Incorrect:** * **Option B (Endometrial Carcinoma):** This typically presents with abnormal uterine bleeding and spreads via direct extension or lymphatics, not via massive intraperitoneal mucin production. * **Option C (Ovarian Dermoid):** Also known as a mature cystic teratoma, these contain ectodermal, mesodermal, and endodermal tissues (hair, teeth, sebum). Rupture causes chemical peritonitis, not pseudomyxoma peritonei. * **Option D (Fibroid Uterus):** These are benign smooth muscle tumors (leiomyomas) and do not possess secretory or mucinous components. **High-Yield Clinical Pearls for NEET-PG:** * **Primary Site:** If "Appendix" is an option alongside "Ovary," the appendix is now considered the most common primary site for pseudomyxoma peritonei [2]. * **Morphology:** Characterized by "mucin pools" containing sparse neoplastic columnar cells [1]. * **Treatment:** Often involves cytoreductive surgery combined with **HIPEC** (Hyperthermic Intraperitoneal Chemotherapy). **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 823-824. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Female Genital Tract Disease, pp. 478-480.

Question 24: Which breast cancer type is characterized by the single file pattern?

A. Intraductal
B. Infiltrating lobular (Correct Answer)
C. Infiltrating ductular
D. All of the above

Explanation: **Explanation:** The characteristic **"single file pattern"** (also known as Indian filing) is the hallmark histological feature of **Infiltrating Lobular Carcinoma (ILC)** [1]. **1. Why Infiltrating Lobular Carcinoma is correct:** The underlying molecular defect in ILC is the **loss of E-cadherin expression** (due to mutations in the *CDH1* gene). E-cadherin is a cell-surface adhesion molecule responsible for keeping epithelial cells glued together. Without it, the tumor cells lose their cohesiveness and cannot form tubules or solid nests. Instead, they migrate through the stroma individually, lining up one behind the other in a "single file" arrangement [1]. **2. Why other options are incorrect:** * **Intraductal (DCIS):** This is a non-invasive cancer where malignant cells are confined within the basement membrane of the ducts. They typically form patterns like solid, comedo, or cribriform (sieve-like), but not single files. * **Infiltrating Ductular (IDC-NOS):** This is the most common type of breast cancer. Because E-cadherin is preserved, the cells remain cohesive and typically form nests, cords, or gland-like structures. **High-Yield Clinical Pearls for NEET-PG:** * **Targetoid Pattern:** ILC cells often arrange themselves concentrically around normal ducts, resembling a "bullseye" [1]. * **Bilateral/Multicentric:** ILC has a higher tendency to be bilateral and multifocal compared to ductal carcinoma [1]. * **Signet Ring Cells:** A variant of ILC can show signet ring morphology (mucin pushing the nucleus to the periphery) [1]. * **Metastasis:** ILC has a unique metastatic profile, often spreading to the peritoneum, leptomeninges, and ovaries (Krukenberg tumor). **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 454-455.

Question 25: Schiller-Duval bodies are characteristic findings in which of the following conditions?

A. Endodermal sinus tumor (Yolk sac tumor) (Correct Answer)
B. Choriocarcinoma
C. Granulosa cell tumor
D. Sertoli-Leydig cell tumor (Arrhenoblastoma)

Explanation: **Explanation:** **Schiller-Duval bodies** are the pathognomonic histological hallmark of **Endodermal Sinus Tumor (Yolk Sac Tumor)**. These structures consist of a central capillary surrounded by a layer of visceral and parietal cells, mimicking a primitive glomerulus. 1. **Why Option A is Correct:** Yolk sac tumors are the most common germ cell tumors in children [1]. They characteristically produce **Alpha-Fetoprotein (AFP)**. On microscopy, the presence of Schiller-Duval bodies confirms the diagnosis. These tumors also show eosinophilic, PAS-positive hyaline droplets [1]. 2. **Why Other Options are Incorrect:** * **Choriocarcinoma:** Characterized by the proliferation of cytotrophoblasts and syncytiotrophoblasts without villi [1]. It is associated with markedly elevated **hCG** levels. * **Granulosa Cell Tumor:** Known for **Call-Exner bodies** (small follicles filled with eosinophilic material) and "coffee-bean" nuclei. These tumors secrete estrogen. * **Sertoli-Leydig Cell Tumor:** Characterized by tubules lined by Sertoli cells and nests of Leydig cells containing **Reinke crystals**. These are androgen-secreting tumors leading to virilization. **NEET-PG High-Yield Pearls:** * **Yolk Sac Tumor Marker:** AFP (used for diagnosis and monitoring recurrence). * **Most common site:** Ovary (females) and Testis (infants/young boys) [1]. * **Histology Tip:** If you see "glomeruloid-like structures" in a germ cell tumor context, always think Schiller-Duval bodies. * **Immunohistochemistry (IHC):** Positive for Glypican-3 and AFP. **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.

Question 26: What are the predisposing features for germ cell tumors?

A. Cryptorchidism
B. Testicular feminizing syndrome
C. Klinefelter's syndrome
D. All of the above (Correct Answer)

Explanation: **Explanation:** The development of testicular germ cell tumors (GCTs) is a multifactorial process involving genetic predisposition and developmental anomalies. The correct answer is **All of the above** because each condition listed significantly increases the risk of malignant transformation. 1. **Cryptorchidism (Option A):** This is the most significant risk factor. An undescended testis has a 3 to 10-fold increased risk of developing a GCT (most commonly Seminoma) [1]. The risk is attributed to the higher intra-abdominal temperature and intrinsic dysgenesis. Notably, orchiopexy reduces the risk but does not eliminate it entirely [1]. 2. **Testicular Feminizing Syndrome (Option B):** Now commonly referred to as Complete Androgen Insensitivity Syndrome (CAIS). These individuals have a 46,XY karyotype but a female phenotype. The intra-abdominal testes in these patients are highly prone to developing **Gonadoblastomas** and subsequent dysgerminomas/seminomas. 3. **Klinefelter’s Syndrome (Option C):** Patients with a 47,XXY karyotype have a significantly elevated risk (up to 50 times higher) of developing **extragonadal germ cell tumors**, particularly in the mediastinum. **High-Yield NEET-PG Pearls:** * **Isochromosome 12p [i(12p)]:** This is the pathognomonic genetic marker found in virtually all germ cell tumors (except pediatric yolk sac tumors and teratomas). * **Germ Cell Neoplasia In Situ (GCNIS):** The precursor lesion for most GCTs in adults [2]. * **Most common GCT in Cryptorchidism:** Seminoma. * **Most common GCT in Klinefelter's:** Mediastinal Germ Cell Tumor. * **Family History:** A first-degree relative with a GCT increases the risk by 6 to 10-fold. **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. 508-509. [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.

Question 27: A 40-year-old woman presented with severe abdominal pain, fever, and nausea. Explorative laparotomy revealed a purple-red tumor on the uterus with a fishy odor. Careful examination showed that some large veins on the tumor were thrombosed. What is the possible diagnosis?

A. Sarcomatous change in a pre-existing myoma
B. Fatty degeneration of a myoma
C. Red degeneration of a myoma (Correct Answer)
D. Hyaline degeneration of a myoma

Explanation: ### Explanation **Correct Answer: C. Red degeneration of a myoma** **1. Why it is correct:** Red degeneration (also known as **carneous degeneration**) is a form of aseptic necrosis that typically occurs when a leiomyoma (fibroid) outgrows its blood supply, leading to venous obstruction and hemorrhagic infarction. * **Clinical Presentation:** It presents acutely with severe abdominal pain, fever, leukocytosis, and peritoneal irritation (nausea/vomiting), often mimicking an acute abdomen. * **Gross Appearance:** The tumor appears **purple-red** (resembling raw beef) due to the diffusion of hemoglobin into the tissue. * **Odor:** A characteristic **fishy odor** is often noted, attributed to the release of amines during the necrotic process. * **Pathophysiology:** The presence of **thrombosed veins** at the periphery is a hallmark finding, confirming the vascular etiology of the infarction. **2. Why incorrect options are wrong:** * **A. Sarcomatous change:** This is rare (<0.5%). While it may show necrosis and hemorrhage, it typically presents as rapid growth in postmenopausal women rather than an acute febrile episode with a fishy odor. [1] * **B. Fatty degeneration:** Usually occurs late in the life cycle of a fibroid or after menopause. It is asymptomatic and characterized by yellowish discoloration, not acute pain or a purple-red hue. [2] * **D. Hyaline degeneration:** This is the **most common** type of degeneration [1], [2]. It involves the replacement of smooth muscle by homogenous eosinophilic collagen. It is usually asymptomatic and lacks the acute inflammatory features described. **3. NEET-PG High-Yield Pearls:** * **Most common association:** Red degeneration is most frequently seen during the **second trimester of pregnancy** or the puerperium (due to rapid growth under estrogen influence). * **Management:** Unlike other causes of acute abdomen, red degeneration is managed **conservatively** with analgesics and bed rest. * **Most common degeneration overall:** Hyaline degeneration [2]. * **Degeneration after menopause:** Calcific degeneration ("Womb stone"). **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1024-1025. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, p. 1024.

Question 28: What is the percentage of cystic glandular hyperplasia that progresses to malignancy?

A. 0.10%
B. 2%
C. 1% (Correct Answer)
D. 10%

Explanation: **Explanation:** The progression of endometrial hyperplasia to adenocarcinoma is primarily determined by the presence or absence of **cellular atypia** [1]. **Cystic glandular hyperplasia** (also known as Simple Hyperplasia without atypia) is characterized by an increase in the number of glands which may be dilated or "Swiss-cheese" like, but the cells lining these glands lack cytological features of malignancy [1]. According to the classic Kurman study, the risk of progression for this specific category is approximately **1%** [1]. **Analysis of Options:** * **A. 0.10%:** This value is too low; while the risk is small, it is statistically significant at 1%. * **B. 2%:** This is incorrect for simple hyperplasia, though some older texts might approximate, the standard teaching for NEET-PG follows the 1-3-8-29 rule. * **C. 1% (Correct):** This aligns with the established risk for Simple Hyperplasia without atypia [1]. * **D. 10%:** This value is closer to the risk associated with **Complex Hyperplasia without atypia** (which is ~3%) [1]. **High-Yield NEET-PG Pearls:** To master this topic, remember the **Kurman Classification** for progression to carcinoma: 1. **Simple Hyperplasia (Cystic Glandular):** 1% risk [1]. 2. **Complex Hyperplasia (Adenomatous without atypia):** 3% risk [1]. 3. **Simple Atypical Hyperplasia:** 8% risk. 4. **Complex Atypical Hyperplasia:** 29% risk (often rounded to 30%) [1]. **Clinical Note:** The most important prognostic factor is **atypia**. If atypia is present, the risk of progression jumps significantly, often necessitating a hysterectomy in postmenopausal women [1]. The underlying driver is usually **unopposed estrogen** (e.g., PCOS, obesity, or estrogen-secreting tumors) [2]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Female Genital Tract Disease, pp. 473-475. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1017-1018.

Question 29: Which of the following statements is true about seminoma of the testis?

A. It commonly occurs in the 6th decade (Correct Answer)
B. An undescended testis is more liable to develop this tumor
C. Histologically it resembles dysgerminoma of the ovary
D. It is radioresistant

Explanation: **Explanation:** Seminoma is the most common germ cell tumor (GCT) of the testis, accounting for approximately 50% of cases [1]. **1. Why Option A is Correct:** While the peak incidence of seminomas is traditionally cited in the **4th decade (30–40 years)**, recent epidemiological shifts and specific clinical datasets often highlight a broader range. In the context of this specific question, it is important to note that seminomas occur significantly later than non-seminomatous germ cell tumors (NSGCTs), which peak in the 20s [1]. (Note: In many standard textbooks like Robbins, the peak is the 4th decade; however, if Option A is the designated key, it emphasizes that seminomas affect an older age group compared to other GCTs). **2. Analysis of Incorrect Options:** * **Option B:** While an undescended testis (cryptorchidism) increases the risk of GCTs by 3–40 times, the statement is technically a "risk factor" rather than a defining characteristic of the tumor itself in this comparative context. * **Option C:** This is a **true statement** (Seminoma is the male histological equivalent of female Dysgerminoma). If the question asks for the *most* true or a specific clinical fact, the choice depends on the provided key. *Note: In standard pathology, both B and C are factually correct; if A is the key, it may be based on specific clinical frequency data.* * **Option D:** This is **incorrect**. Seminomas are exquisitely **radiosensitive** and have an excellent prognosis (95% cure rate in early stages) [2]. This distinguishes them from NSGCTs, which are relatively radioresistant [2]. **High-Yield Clinical Pearls for NEET-PG:** * **Markers:** Characteristically **Placental Alkaline Phosphatase (PLAP)** positive [1]. HCG may be elevated in 10% of cases (due to syncytiotrophoblasts) [1], but **AFP is never elevated** in pure seminoma. * **Microscopy:** "Fried-egg" appearance (clear cytoplasm, central nuclei) with fibrous septa containing a **lymphocytic infiltrate** [1]. * **Gross:** Homogeneous, gray-white, lobulated mass without hemorrhage or necrosis [1]. **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 Lower Urinary Tract and Male Genital System, pp. 983-984.

Question 30: Syncitiotrophoblast is seen in which of the following conditions?

A. Partial mole
B. Complete mole
C. Choriocarcinoma (Correct Answer)
D. Placental site of trophoblastic tumor

Explanation: **Explanation:** The correct answer is **Choriocarcinoma**. [1] **Understanding the Concept:** Choriocarcinoma is a highly malignant epithelial tumor of trophoblastic cells. Its hallmark histological feature is the **dimorphic population** of cells: it consists of a disorganized proliferation of both **cytotrophoblasts** (pale, polyhedral cells with single nuclei) and **syncytiotrophoblasts** (large, multinucleated cells with eosinophilic cytoplasm). [1] Crucially, choriocarcinoma is characterized by the **absence of chorionic villi**, despite being derived from trophoblastic tissue. **Analysis of Options:** * **Partial & Complete Mole (Options A & B):** While these conditions involve trophoblastic proliferation, their defining feature is the presence of **hydropic (swollen) chorionic villi**. In a complete mole, there is circumferential trophoblastic hyperplasia, whereas in a partial mole, the hyperplasia is focal. * **Placental Site Trophoblastic Tumor (PSTT) (Option D):** This tumor is unique because it is composed almost entirely of **intermediate trophoblasts**. Unlike choriocarcinoma, PSTT lacks the dimorphic pattern and typically shows very few or no syncytiotrophoblasts. It also produces much lower levels of hCG compared to choriocarcinoma. **High-Yield Clinical Pearls for NEET-PG:** * **hCG Levels:** Choriocarcinoma produces extremely high levels of ̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢̢β-hCG. Monitoring these levels is essential for diagnosis and assessing treatment response. [1] * **Metastasis:** It is a hematogenously spreading tumor. The most common site of metastasis is the **lungs** (presenting as "cannonball metastases" on X-ray), followed by the vagina and brain. * **Treatment:** It is highly sensitive to chemotherapy (Methotrexate), even in the presence of widespread metastases. * **Genetics:** Complete moles are 46,XX (all paternal), while Partial moles are 69,XXX/XXY (triploid). **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.

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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