Reproductive Pathology Practice Questions

Q: Krukenberg adenocarcinoma of the ovary can occur as a result of metastases from all except?

Liver. **Explanation:** A **Krukenberg tumor** is a metastatic signet-ring cell adenocarcinoma of the ovary. The primary characteristic of this tumor is the presence of mucin-secreting "signet-ring" cells within a cellular stroma derived from the ovarian medulla. **Why Liver is the correct answer:** While the liver is a common site for primary malignancies (HCC) and a frequent site for metastases *from* other organs, it is **not** a recognized primary source for Krukenberg tumors. Krukenberg tumors specifically originate from glandular (mucinous) epithelium of the gastrointestinal tract or breast. **Analysis of Incorrect Options:** * **Stomach (Option A):** This is the **most common** primary site (approx. 70%). Gastric adenocarcinoma spreads to the ovaries via retrograde lymphatic dissemination or transcoelomic shedding. * **Breast (Option B):** Lobular carcinoma of the breast is a well-documented primary source for Krukenberg tumors. * **Pancreas (Option D):** Along with the colon, appendix, and gallbladder, the pancreas is a recognized primary site for these metastatic lesions. **NEET-PG High-Yield Pearls:** * **Most Common Primary:** Stomach (specifically the pylorus). * **Microscopic Hallmark:** Signet-ring cells (nucleus pushed to the periphery by a large mucin vacuole). * **Laterality:** Usually **bilateral** (80% of cases), which helps distinguish it from primary ovarian cancer. * **Route of Spread:** Historically thought to be transcoelomic (seeding), but **retrograde lymphatic spread** is now considered the most likely pathway. * **Stain:** PAS (Periodic Acid-Schiff) and Mucicarmine stains are positive for mucin.

Q: A 58-year-old woman presents with an irregular nodularity that has developed in her right breast over the past 3 months. Mammography demonstrates irregular densities in both breasts. A needle biopsy of one breast lesion shows a certain histology, and an excisional biopsy of the contralateral breast shows similar findings. Which of the following is the most likely pathologic diagnosis?

Lobular carcinoma in situ. **Explanation:** The key to this question lies in the clinical presentation of **bilaterality** and **multicentricity**. **Why Lobular Carcinoma In Situ (LCIS) is correct:** LCIS is characterized by a proliferation of small, discohesive cells (due to loss of **E-cadherin**) filling the acini of the lobules. Unlike ductal carcinomas, LCIS is frequently **bilateral (up to 30-40% of cases)** and multicentric [1]. It is often an incidental finding because it typically does not form a distinct clinical mass or produce characteristic mammographic calcifications. In this scenario, the presence of similar lesions in both breasts strongly points toward LCIS as the most likely diagnosis. **Why the other options are incorrect:** * **Colloid (Mucinous) Carcinoma:** Usually presents as a slow-growing, circumscribed, soft/gelatinous mass in older women. It is typically unilateral. * **Malignant Phyllodes Tumor:** These are large, rapidly growing stromal tumors. While they can be aggressive, they are almost always unilateral and present as a palpable "leaf-like" mass. * **Medullary Carcinoma:** Characterized by large pleomorphic cells with a lymphoid stroma (often associated with BRCA1). It typically presents as a well-circumscribed unilateral mass. **High-Yield Clinical Pearls for NEET-PG:** * **LCIS Marker:** Loss of **E-cadherin** expression (due to CDH1 gene mutation) is the hallmark, leading to the discohesive cell pattern. * **Risk Factor:** LCIS is considered a **risk factor** (indicator) for developing invasive carcinoma in *either* breast, not necessarily a direct precursor. * **Bilateral Breast Cancer:** Whenever a question mentions bilateral or multicentric breast lesions, **Lobular** (either LCIS or Invasive Lobular Carcinoma) should be your top differential [1]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 454-455.

Q: A 23-year-old female presents with pelvic pain and is found to have a 3 cm ovarian mass on the left ovary. Grossly, the mass consists of multiple cystic spaces. Histologically, these cysts are lined by tall columnar epithelium, with some of the cells being ciliated. What is your diagnosis of this ovarian tumor, which histologically recapitulates the histology of the fallopian tubes?

Serous tumor. **Explanation:** The correct diagnosis is a **Serous tumor**. The key to this question lies in the histological description: "tall columnar epithelium, with some of the cells being ciliated." In gynecologic pathology, ovarian surface epithelial tumors are classified based on the type of adult female reproductive tract tissue they "recapitulate" or mimic. 1. **Serous tumors** mimic the lining of the **fallopian tube** (endosalpinx). They are characterized by tall columnar ciliated cells. 2. **Mucinous tumors** mimic the **endocervix** or intestinal epithelium, characterized by cells containing apical mucin. 3. **Endometrioid tumors** mimic the **endometrium** (uterine lining). 4. **Clear cell tumors** are thought to mimic the **gestational endometrium** (decidua) and are often associated with endometriosis. **Why the other options are incorrect:** * **Mucinous tumor:** These would show non-ciliated cells with abundant intracellular mucin (resembling endocervical glands). * **Endometrioid tumor:** These typically form tubular glands resembling the lining of the uterus, often associated with endometriosis. * **Clear cell tumor:** These are characterized by "hobnail" cells and clear cytoplasm due to glycogen accumulation. **High-Yield NEET-PG Pearls:** * **Serous Cystadenoma** is the most common benign epithelial ovarian tumor. * **Psammoma bodies** (concentric calcifications) are a classic histological hallmark of serous tumors (especially papillary serous cystadenocarcinoma). * **Bilateralism:** Serous tumors are the most common ovarian tumors to be bilateral (approx. 25% of benign and 65% of malignant cases). * **Tumor Marker:** CA-125 is the most common marker used for monitoring epithelial ovarian tumors, particularly the serous subtype.

Q: A 20-year-old woman has an ovarian tumor removed. The surgical specimen is 10 cm in diameter and cystic. The cystic cavity contains black hair and sebaceous material. Histologic examination of the cyst wall reveals benign differentiated tissues including skin, cartilage, brain, and mucinous glandular epithelium. What is the diagnosis?

Teratoma. **Explanation:** The diagnosis is a **Mature Cystic Teratoma** (also known as a Dermoid Cyst). **Why Teratoma is correct:** A teratoma is a germ cell tumor composed of tissues derived from more than one of the three germ layers (ectoderm, mesoderm, and endoderm). The clinical description of "black hair and sebaceous material" (ectoderm), "cartilage" (mesoderm), and "mucinous glandular epithelium" (endoderm) is pathognomonic. In a 20-year-old female, mature cystic teratomas are the most common benign ovarian germ cell tumors. The presence of "benign differentiated tissues" confirms it is a **mature** (benign) rather than an immature (malignant) teratoma. **Why other options are incorrect:** * **Adenoma:** This is a benign tumor of glandular epithelial origin. While it may contain mucinous epithelium, it would not contain hair, brain tissue, or cartilage. * **Chondroma:** This is a benign tumor composed exclusively of mature cartilage. It does not explain the presence of hair or other germ layer tissues. * **Hamartoma:** This is a disorganized mass of mature, specialized cells indigenous to the particular site. Since hair and brain tissue are not indigenous to the ovary, this term is inapplicable. **High-Yield NEET-PG Pearls:** * **Most common ovarian tumor in young women:** Mature Cystic Teratoma. * **Rokitansky’s Protuberance:** A solid nodule within the cyst wall where most hair and teeth are found. * **Most common complication:** Torsion (due to high fat content/buoyancy). * **Malignant transformation:** Occurs in <2% of cases, most commonly into **Squamous Cell Carcinoma**. * **Struma Ovarii:** A specialized teratoma composed predominantly of thyroid tissue, which can cause hyperthyroidism.

Q: Which gene is associated with autosomal dominant breast cancer?

BRCA 1 and 2. **Explanation:** **BRCA 1 and 2** are the most common genes associated with hereditary breast and ovarian cancer syndromes. They are tumor suppressor genes inherited in an **autosomal dominant** pattern. BRCA1 is located on chromosome 17q, and BRCA2 is on chromosome 13q. Mutations in these genes lead to a significantly increased lifetime risk of breast cancer (up to 70-80%) and ovarian cancer. **Analysis of Incorrect Options:** * **PTEN:** Mutations in the PTEN gene cause **Cowden Syndrome**, which is associated with breast cancer, but it is less common than BRCA. **KAI-1** is a metastasis suppressor gene, not typically linked to autosomal dominant inheritance patterns in clinical breast cancer screening. * **APC:** This gene is associated with **Familial Adenomatous Polyposis (FAP)** and colorectal cancer. While FAP patients have various extracolonic manifestations, APC is not a primary driver for hereditary breast cancer. * **P53:** Mutations in the TP53 gene cause **Li-Fraumeni Syndrome**. While this syndrome carries a high risk of early-onset breast cancer, the question asks for the most characteristic association; BRCA 1 and 2 are the "gold standard" answer for autosomal dominant breast cancer in competitive exams. **High-Yield Clinical Pearls for NEET-PG:** * **BRCA1:** Associated with Medullary carcinoma of the breast and Triple-Negative Breast Cancer (TNBC). * **BRCA2:** Associated with **Male Breast Cancer** and increased risk of pancreatic and prostate cancer. * **Prophylaxis:** Bilateral Salpingo-oophorectomy (BSO) and Bilateral Simple Mastectomy are recommended for high-risk mutation carriers. * **Screening:** High-risk patients should start annual screening with **MRI** (more sensitive than mammography in young, dense breasts) starting at age 25-30.

Q: Bloom Richardson staging is used for which condition?

Breast cancer. **Explanation:** **Bloom-Richardson Staging (Grading)** is the standard histopathological grading system used specifically for **Breast Cancer**. The correct answer is **B**. The system, currently used in its **Modified Nottingham Revision**, assesses the aggressiveness of the tumor based on three morphological features observed under a microscope: 1. **Tubule Formation:** How much of the tumor exhibits normal duct-like structures. 2. **Nuclear Pleomorphism:** The degree of variation in the size and shape of the cancer cell nuclei. 3. **Mitotic Count:** The number of actively dividing cells per high-power field. Each parameter is scored from 1 to 3, and the total score determines the Grade (Grade I: Well-differentiated; Grade II: Moderately differentiated; Grade III: Poorly differentiated). **Why other options are incorrect:** * **Prostate Cancer:** Uses the **Gleason Scoring System**, which is based on architectural patterns of glandular growth. * **Ovarian Cancer:** Often uses the **FIGO Staging** (clinical/surgical) or the **Shimizu-Silverberg** grading system. * **Penile Cancer:** Typically graded using the **Broder’s Grading System**, which is based on the degree of keratinization and cellular differentiation. **High-Yield Clinical Pearls for NEET-PG:** * **Staging vs. Grading:** Remember that Bloom-Richardson is a **Grading** system (microscopic), whereas **TNM** is a **Staging** system (clinical/extent of spread). * **Most Important Prognostic Factor:** For breast cancer, the **number of axillary lymph nodes involved** is the most important prognostic factor. * **Triple Test:** For any breast lump, the triple test includes Clinical Examination, Imaging (Mammography/USG), and Pathology (FNAC/Core Biopsy).

Q: What is true about a hydatidiform mole?

Trophoblastic proliferation.. ### Explanation **Correct Answer: B. Trophoblastic proliferation** Hydatidiform mole (Gestational Trophoblastic Disease) is characterized by two pathognomonic histological features: **trophoblastic proliferation** (involving both cytotrophoblast and syncytiotrophoblast) and **hydropic swelling of the chorionic villi**. While both are present, trophoblastic proliferation is the definitive diagnostic feature that distinguishes it from other conditions like hydropic abortus. **Analysis of Options:** * **A. Complete mole seen in humans only:** This is incorrect. While most common in humans, molar pregnancies have been documented in other mammals (e.g., macaques). * **C. Hydropic degeneration:** While hydropic change (swelling) occurs, "degeneration" is a misnomer. In a mole, the villi are living and proliferating; "hydropic degeneration" is a term more accurately used for a blighted ovum or missed abortion where the villi swell after fetal death. * **D. Villus pattern absent:** This is incorrect. The presence of **swollen chorionic villi** (resembling a "bunch of grapes") is the hallmark of a hydatidiform mole. The absence of villi is characteristic of Choriocarcinoma, not a mole. **High-Yield Clinical Pearls for NEET-PG:** * **Genetics:** Complete Mole is usually **46,XX** (diploid, paternal origin only/androgenetic). Partial Mole is usually **69,XXX/XXY** (triploid, maternal + paternal). * **Snowstorm Appearance:** Classic ultrasound finding due to multiple hydropic villi. * **Theca Lutein Cysts:** Often seen bilaterally due to extremely high hCG levels. * **Risk of Malignancy:** Higher in Complete Moles (15–20%) compared to Partial Moles (<5%). * **Management:** Suction evacuation is the treatment of choice; follow-up with weekly hCG levels until three consecutive negatives are achieved.

Question 1

Krukenberg adenocarcinoma of the ovary can occur as a result of metastases from all except?

Accepted Answer

Liver

Answer

Stomach

Answer

Breast

Answer

Pancreas

Question 2

A 58-year-old woman presents with an irregular nodularity that has developed in her right breast over the past 3 months. Mammography demonstrates irregular densities in both breasts. A needle biopsy of one breast lesion shows a certain histology, and an excisional biopsy of the contralateral breast shows similar findings. Which of the following is the most likely pathologic diagnosis?

Accepted Answer

Lobular carcinoma in situ

Answer

Colloid carcinoma

Answer

Malignant phyllodes tumor

Answer

Medullary carcinoma

Question 3

A 23-year-old female presents with pelvic pain and is found to have a 3 cm ovarian mass on the left ovary. Grossly, the mass consists of multiple cystic spaces. Histologically, these cysts are lined by tall columnar epithelium, with some of the cells being ciliated. What is your diagnosis of this ovarian tumor, which histologically recapitulates the histology of the fallopian tubes?

Accepted Answer

Serous tumor

Answer

Mucinous tumor

Answer

Endometrioid tumor

Answer

Clear cell tumor

Question 4

A 20-year-old woman has an ovarian tumor removed. The surgical specimen is 10 cm in diameter and cystic. The cystic cavity contains black hair and sebaceous material. Histologic examination of the cyst wall reveals benign differentiated tissues including skin, cartilage, brain, and mucinous glandular epithelium. What is the diagnosis?

Accepted Answer

Teratoma

Answer

Adenoma

Answer

Chondroma

Answer

Hamartoma

Question 5

A 25-year-old man undergoes orchiectomy for a testicular tumor. Microscopically, the tumor shows a variety of patterns, including lobules containing large cells with watery cytoplasm, structures resembling primitive glomeruli, syncytiotrophoblast, and shafts of undifferentiated cells with focal glandular differentiation. Which of the following terms most accurately describes this tumor?

Accepted Answer

Mixed tumor

Answer

Choriocarcinoma

Answer

Embryonal carcinoma

Answer

Seminoma

Question 6

Which gene is associated with autosomal dominant breast cancer?

Accepted Answer

BRCA 1 and 2

Answer

PTEN and KAI

Answer

APC

Answer

P53

Question 7

The parents of a 2-year-old boy with hypospadias (urethra opens on the ventral aspect of the penis) visit a genetic counselor to discuss the chances that a similar birth defect will occur in their future offspring. This birth defect shows which of the following patterns of inheritance?

Accepted Answer

Multifactorial

Answer

Autosomal recessive

Answer

Autosomal dominant

Answer

X-linked dominant

Question 8

Bloom Richardson staging is used for which condition?

Accepted Answer

Breast cancer

Answer

Prostate cancer

Answer

Ovarian cancer

Answer

Penile cancer

Question 9

In which of the following types of carcinoma of the breast is a comedo growth pattern seen?

Accepted Answer

Ductal carcinoma in situ

Answer

Medullary carcinoma

Answer

Lobular carcinoma in situ

Answer

Infiltrating lobular carcinoma

Question 10

What is true about a hydatidiform mole?

Accepted Answer

Trophoblastic proliferation.

Answer

Complete mole seen in humans only.

Answer

Hydropic degeneration.

Answer

Villus pattern absent.

Reproductive Pathology — MCQs

Reproductive Pathology — MCQs

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