Reproductive Pathology Practice Questions

Q: A 35-year-old woman presents with a firm, painless, round lump in her right breast following a traumatic injury. Which statement is false regarding the condition she is experiencing?

There is an increased risk of breast cancer. **Explanation:** The clinical presentation of a firm, painless lump following trauma in the breast is characteristic of **Fat Necrosis**. **1. Why Option D is the Correct (False) Statement:** Fat necrosis is a **benign, inflammatory process** resulting from the release of fatty acids from injured adipocytes. It is strictly a reactive condition and **does not increase the risk of breast cancer**. Its clinical significance lies in its ability to mimic carcinoma on physical examination (firm, fixed mass) and mammography (calcifications). **2. Analysis of Other Options:** * **Option A (Dystrophic calcification):** As the necrotic tissue heals, fatty acids bind with calcium (saponification), leading to dystrophic calcification. This is a classic feature seen on mammography as "eggshell" calcifications. * **Option B (Liquefactive fat necrosis):** While "liquefactive" is usually associated with CNS infarcts or abscesses, in the breast, the enzymatic breakdown of fat by lipases initially creates a liquefied area of fatty debris before it progresses to fibrosis. * **Option C (Giant cells and macrophages):** Histologically, fat necrosis is characterized by an inflammatory infiltrate. Macrophages ingest the released lipids (becoming **foamy/lipid-laden macrophages**), and a foreign-body giant cell reaction occurs around the necrotic debris. **Clinical Pearls for NEET-PG:** * **Key Histology:** Anucleated adipocytes (ghost cells), foamy macrophages, and multinucleated giant cells. * **Radiology:** May show a "radiolucent oil cyst" or eggshell calcifications. * **Differential:** Always differentiate from **Comedocarcinoma**, which shows *dystrophic* calcification but is malignant. * **Trauma History:** Only present in about 50% of fat necrosis cases; its absence does not rule out the diagnosis.

Q: Which of the following is NOT associated with arrhenoblastoma?

Call Exner bodies. **Explanation:** **Arrhenoblastoma** (also known as a **Sertoli-Leydig Cell Tumor**) is a rare sex cord-stromal tumor of the ovary [1]. The correct answer is **Call-Exner bodies**, as these are the pathognomonic histological hallmark of **Granulosa Cell Tumors**, not arrhenoblastomas. 1. **Why Call-Exner bodies is the correct answer:** Call-Exner bodies are small, gland-like spaces filled with eosinophilic material and basement membrane components, surrounded by granulosa cells. They are characteristic of adult-type Granulosa Cell Tumors. Their presence in a question regarding arrhenoblastoma represents a classic "distractor" between two different types of sex cord-stromal tumors. 2. **Analysis of Incorrect Options:** * **CD56:** This is a sensitive immunohistochemical marker for sex cord-stromal tumors, including Sertoli-Leydig cell tumors. * **Sex cord-stromal tumor:** Arrhenoblastoma belongs to this category of ovarian neoplasms, which arise from the ovarian mesenchyme (the precursors to Sertoli, Leydig, Granulosa, and Theca cells) [1]. * **Masculinizing tumor:** These tumors typically secrete androgens (testosterone). Clinically, patients present with **defeminization** (atrophy of breasts, amenorrhea) followed by **virilization** (hirsutism, clitoromegaly, and deepening of the voice) [1]. **High-Yield NEET-PG Pearls:** * **Reinke Crystals:** Characteristic rod-shaped inclusions found in the Leydig cell component of these tumors (though only present in about 35% of cases) [1]. * **DICER1 Mutation:** Frequently associated with moderately and poorly differentiated Sertoli-Leydig cell tumors. * **Tumor Marker:** Often associated with elevated **Alpha-fetoprotein (AFP)** in cases with heterologous elements (like hepatoid differentiation). **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1037-1038.

Q: Most commonly, this tumor is due to carcinoma of which of the following organs?

Stomach. ***Stomach*** - **Gastric adenocarcinoma** with **signet ring cells** is the most common primary source of **Krukenberg tumor**, accounting for 70-80% of cases. - The tumor characteristically shows **bilateral ovarian involvement** with **mucin-filled signet ring cells** and **cellular ovarian stroma**. *Breast* - While **breast carcinoma** can metastasize to the ovaries, it represents only 5-10% of **Krukenberg tumors**. - Breast metastases typically show **ductal or lobular patterns** rather than the classic **signet ring cell morphology**. *Colon* - **Colorectal adenocarcinoma** accounts for approximately 10-15% of ovarian metastases but rarely forms **Krukenberg tumors**. - Colonic metastases usually maintain **glandular architecture** without the characteristic **signet ring cell appearance**. *Uterus* - **Uterine carcinoma** rarely metastasizes to the ovaries and is not associated with **Krukenberg tumor formation**. - Uterine tumors typically spread by **direct extension** or **lymphatic spread** rather than **transcoelomic metastasis**.

Q: Which of the following is NOT associated with breast cancer?

Apocrine metaplasia. **Explanation:** The risk of developing breast cancer is categorized based on the histological findings of benign breast lesions [1]. **1. Why Apocrine Metaplasia is the correct answer:** Apocrine metaplasia is a feature of **Non-proliferative Breast Disease (Fibrocystic changes)** [1]. In this condition, the cuboidal epithelium of the acini undergoes transformation into large columnar cells with granular eosinophilic cytoplasm (resembling sweat glands). This change, along with simple cysts and fibrosis, carries **no increased risk (Relative Risk 1.0)** for developing invasive carcinoma. **2. Analysis of Incorrect Options:** * **BRCA 1 & BRCA 2 mutations:** These are high-penetrance germline mutations. BRCA1 (Chromosome 17q) and BRCA2 (Chromosome 13q) are tumor suppressor genes involved in DNA repair. Mutations significantly increase the lifetime risk of breast and ovarian cancer. * **Atypical Ductal Hyperplasia (ADH):** This falls under **Proliferative disease with atypia** [2]. It histologically resembles ductal carcinoma in situ (DCIS) but is limited in extent [2]. It carries a **high risk (Relative Risk 4.0–5.0)** of progressing to invasive cancer. **3. High-Yield Clinical Pearls for NEET-PG:** * **No Risk (RR 1.0):** Apocrine metaplasia, cysts, mild hyperplasia, fibroadenoma (without complex features). * **Slightly Increased Risk (RR 1.5–2.0):** Moderate to florid hyperplasia (without atypia), ductal papillomatosis, sclerosing adenosis. * **Significantly Increased Risk (RR 4.0–5.0):** Atypical ductal hyperplasia (ADH) and Atypical lobular hyperplasia (ALH) [2]. * **Highest Risk:** Carcinoma in situ (DCIS/LCIS) carries an RR of 8.0–10.0. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, p. 1052. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1054-1056.

Q: Fallopian tube dysmotility is seen in which of the following conditions?

Kartagener syndrome. **Explanation:** **Correct Answer: C. Kartagener Syndrome** Kartagener syndrome is a subset of **Primary Ciliary Dyskinesia (PCD)**, characterized by the triad of situs inversus, chronic sinusitis, and bronchiectasis. The underlying pathology is a genetic defect in the **dynein arms** of cilia (9+2 microtubule arrangement). The lining of the Fallopian tubes (salpinx) consists of ciliated columnar epithelium. These cilia are responsible for the transport of the ovum toward the uterus and the movement of sperm toward the egg. In Kartagener syndrome, these cilia are immotile or dyskinetic, leading to **Fallopian tube dysmotility**. This significantly increases the risk of **ectopic pregnancy** [1] and **female infertility**, mirroring the mechanism of male infertility caused by immotile sperm flagella. **Analysis of Incorrect Options:** * **A. Noonan Syndrome:** A genetic disorder (often PTPN11 mutation) characterized by short stature, webbed neck, and pulmonary stenosis. It does not involve ciliary dysfunction. * **B. Turner Syndrome (45, XO):** Characterized by "streak ovaries" and primary amenorrhea due to accelerated oocyte atresia [2]. While it causes infertility, the mechanism is ovarian failure, not tubal dysmotility. * **C. Marfan Syndrome:** A connective tissue disorder caused by FBN1 mutations affecting fibrillin-1. It involves skeletal, ocular, and cardiovascular systems (e.g., aortic dissection) but not ciliary motility. **NEET-PG High-Yield Pearls:** * **Dynein Arms:** The ATPase protein responsible for the sliding movement of microtubules in cilia. * **Clinical Triad:** Situs inversus + Bronchiectasis + Sinusitis. * **Infertility Link:** In males, it is due to immotile spermatozoa (flagellar defect); in females, it is due to impaired ciliary action in the fallopian tubes. * **Diagnosis:** Screening via nasal nitric oxide levels; confirmed by electron microscopy or genetic testing.

Q: Adenoacanthoma is which type of uterine cancer?

Well-differentiated adenocarcinoma. Explanation: Adenoacanthoma is a histological variant of endometrioid adenocarcinoma characterized by the presence of benign squamous metaplasia within the glandular elements [1]. 1. Why Option B is Correct: By definition, adenoacanthoma is a well-differentiated (Grade 1) adenocarcinoma [1]. The prognosis is generally excellent because the squamous component is mature and non-malignant, and the underlying glandular component is low-grade. 2. Why Other Options are Incorrect: * Option A: If the squamous component in a uterine cancer is malignant (rather than benign), it is termed Adenosquamous carcinoma, which is poorly differentiated and carries a much worse prognosis. * Option C: Mucinous carcinoma is a distinct subtype of endometrial cancer where >50% of the tumor contains mucin; it does not specifically refer to squamous metaplasia. * Option D: Papillary serous carcinoma is a Type II endometrial cancer [1]. It is highly aggressive, high-grade, and unrelated to the benign squamous elements seen in adenoacanthoma. High-Yield Clinical Pearls for NEET-PG: * Adenoacanthoma: Benign squamous elements + Well-differentiated glands (Good prognosis). * Adenosquamous Carcinoma: Malignant squamous elements + Malignant glands (Poor prognosis). * Most common site: The most common site for adenoacanthoma is the endometrium, though it can rarely occur in the ovary (associated with endometriosis). * Type I vs. Type II: Adenoacanthoma falls under Type I Endometrial Carcinoma, which is estrogen-dependent and generally has a favorable outcome.

Q: Which of the following is NOT a sex cord-stromal tumor of the ovary?

Teratoma. **Explanation:** Ovarian tumors are classified based on their tissue of origin into three primary categories: Surface Epithelial tumors, Germ Cell tumors, and Sex Cord-Stromal tumors. **Why Teratoma is the correct answer:** A **Teratoma** is a **Germ Cell Tumor (GCT)**. It is derived from pluripotent germ cells and typically contains tissues from all three embryonic germ layers (ectoderm, mesoderm, and endoderm). Because it originates from germ cells rather than the ovarian stroma or sex cords, it does not belong to the sex cord-stromal category. **Analysis of incorrect options (Sex Cord-Stromal Tumors):** * **Granulosa cell tumor:** The most common malignant sex cord-stromal tumor. It often secretes estrogen, leading to endometrial hyperplasia or precocious puberty. * **Thecoma:** A benign stromal tumor composed of theca cells; it is also typically estrogen-producing and often associated with fibromas. * **Sertoli-Leydig cell tumor:** A rare tumor that mimics testicular structures. It often secretes androgens, leading to virilization (hirsutism, clitoromegaly). **High-Yield Clinical Pearls for NEET-PG:** * **Call-Exner Bodies:** Pathognomonic histological finding in Granulosa cell tumors (small follicles filled with eosinophilic material). * **Tumor Markers:** Inhibin is the specific marker for Granulosa cell tumors; LDH, AFP, and hCG are markers for various Germ Cell Tumors. * **Reinke Crystals:** Characteristic histological finding in Leydig cell tumors. * **Struma Ovarii:** A specialized teratoma composed entirely of thyroid tissue, which can cause hyperthyroidism.

Q: Which tumor secretes placental alkaline phosphatase?

Dysgerminoma. **Explanation:** **Dysgerminoma** is the most common malignant germ cell tumor of the ovary, typically occurring in young women. It is the female counterpart of the testicular seminoma. These tumors are characterized by the secretion of specific biochemical markers, most notably **Placental Alkaline Phosphatase (PLAP)** and **Lactate Dehydrogenase (LDH)**. PLAP is a highly sensitive marker for dysgerminomas and is used for both diagnosis and monitoring treatment response. **Analysis of Incorrect Options:** * **A. Carcinoid tumor:** These are specialized germ cell tumors (monodermal teratomas) that secrete **Serotonin** (5-HT). Clinical presentation often involves Carcinoid Syndrome (flushing, diarrhea) if the tumor bypasses hepatic metabolism. * **B. Arrhenoblastoma (Sertoli-Leydig Cell Tumor):** These are sex cord-stromal tumors that secrete **Androgens** (Testosterone), leading to virilization and defeminization. * **C. Granulosa cell tumor:** These are the most common estrogen-secreting tumors. They produce **Inhibin** (the most specific marker) and **Estrogen**, often presenting with precocious puberty or postmenopausal bleeding. **High-Yield Clinical Pearls for NEET-PG:** * **Dysgerminoma:** Associated with **gonadal dysgenesis** (Swyer syndrome). It is highly radiosensitive and chemosensitive. * **Tumor Marker Summary:** * **Dysgerminoma:** PLAP, LDH, and occasionally hCG. * **Yolk Sac Tumor:** Alpha-fetoprotein (AFP) and Schiller-Duval bodies. * **Choriocarcinoma:** beta-hCG. * **Endodermal Sinus Tumor:** AFP. * **Rule of Thumb:** If a young girl has an adnexal mass and elevated LDH/PLAP, think Dysgerminoma.

Question 1

A 35-year-old woman presents with a firm, painless, round lump in her right breast following a traumatic injury. Which statement is false regarding the condition she is experiencing?

Accepted Answer

There is an increased risk of breast cancer

Answer

Dystrophic calcification can be seen

Answer

Liquefactive fat necrosis may occur

Answer

Multinucleate giant cells and lipid-laden macrophages are present

Question 2

Which of the following is NOT associated with arrhenoblastoma?

Accepted Answer

Call Exner bodies

Answer

CD56

Answer

Sex cord stromal tumor

Answer

Musculanising tumor

Question 3

Most commonly, this tumor is due to carcinoma of which of the following organs?

Accepted Answer

Stomach

Answer

Breast

Answer

Colon

Answer

Uterus

Question 4

A 32-year-old male presents with a few weeks' history of progressive breast tissue enlargement. On examination, a painless testicular mass is noted. Hormonal investigations reveal low serum LH and testosterone levels. What is the likely cause in this case?

Accepted Answer

Sertoli cell tumor

Answer

Spermatocytic tumor

Answer

Androgen resistance state

Answer

Gonadotropin-secreting tumor

Question 5

Which of the following is NOT associated with breast cancer?

Accepted Answer

Apocrine metaplasia

Answer

BRCA 1 & BRCA 2 mutations

Answer

Atypical ductal hyperplasia

Answer

All of the above

Question 6

Fallopian tube dysmotility is seen in which of the following conditions?

Accepted Answer

Kartagener syndrome

Answer

Noonan syndrome

Answer

Turner syndrome

Answer

Marfan syndrome

Question 7

Koilocytes with perinuclear halo on Pap smear are pathognomic of which condition?

Accepted Answer

HPV infection

Answer

Metaplasia

Answer

Dysplasia

Answer

Bacterial vaginosis

Question 8

Adenoacanthoma is which type of uterine cancer?

Accepted Answer

Well-differentiated adenocarcinoma

Answer

Poorly differentiated adenocarcinoma

Answer

Mucinous carcinoma

Answer

Papillary serous carcinoma

Question 9

Which of the following is NOT a sex cord-stromal tumor of the ovary?

Accepted Answer

Teratoma

Answer

Granulosa cell tumor

Answer

Thecoma

Answer

Sertoli-Leydig cell tumor

Question 10

Which tumor secretes placental alkaline phosphatase?

Accepted Answer

Dysgerminoma

Answer

Carcinoid tumor

Answer

Arrhenoblastoma

Answer

Granulosa cell tumor

Reproductive Pathology — MCQs

Reproductive Pathology — MCQs

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