Reproductive Pathology Practice Questions

Q: Not a histological marker for choriocarcinoma:

Villous. ***Villous*** - The absence of **chorionic villi** is a key histological feature distinguishing choriocarcinoma from other gestational trophoblastic diseases. - Choriocarcinoma is characterized by the proliferation of **cytotrophoblasts** and **syncytiotrophoblasts** without an organized villous structure. *Cytotrophoblast* - **Cytotrophoblasts** are one of the two main cell types found in choriocarcinoma, forming solid nests or cords [1]. - These cells typically have clear cytoplasm and distinct cell borders [1]. *Syncytiotrophoblast* - **Syncytiotrophoblasts** are also a prominent component of choriocarcinoma, often forming multinucleated giant cells [1]. - These cells are responsible for producing **human chorionic gonadotropin (hCG)**, which is elevated in choriocarcinoma [1]. *Bizarre nuclei* - **Bizarre and pleomorphic nuclei** are characteristic of the highly anaplastic and aggressive nature of choriocarcinoma cells [2]. - This feature reflects the significant **cellular atypia** and rapid proliferation seen in this malignancy [2]. **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] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, p. 278.

Q: Villous pattern is lost in which condition?

Choriocarcinoma. ***Choriocarcinoma*** - Choriocarcinoma is a highly malignant tumor originating from trophoblastic tissue, characterized by the **absence of chorionic villi**. - Its microscopic appearance shows sheets of anaplastic cytotrophoblast and syncytiotrophoblast without a villous architecture, differentiating it from hydatidiform moles. *Invasive mole* - An invasive mole retains the **chorionic villi structure**, which is a defining feature that distinguishes it from choriocarcinoma. - While it exhibits an aggressive, infiltrative growth into the myometrium, the presence of villi is maintained. *Partial mole* - In a partial mole, **swollen chorionic villi** are still present but are interspersed with normal-appearing villi, and the trophoblastic proliferation is often focal. - The villous pattern, though abnormal, is not lost entirely, distinguishing it from choriocarcinoma. *Hydatidiform mole* - Hydatidiform moles (complete or partial) are characterized by the presence of **hydropic, swollen villi** with varying degrees of trophoblastic proliferation. - The **basic villous architecture** is preserved, although significantly altered and hydropic, unlike the complete absence of villi in choriocarcinoma.

Q: Which of the following ovarian neoplasms is MOST commonly associated with pseudomyxoma peritonei when it arises from ovarian primaries?

Mucinous cystadenocarcinoma. ***Mucinous cystadenocarcinoma*** - **Mucinous cystadenocarcinoma** of the ovary can produce large amounts of mucin, which can rupture and spread throughout the peritoneal cavity, leading to **pseudomyxoma peritonei**. - When pseudomyxoma peritonei originates from ovarian primary tumors, it is most frequently associated with this specific type of ovarian cancer, characterized by its **mucin-secreting epithelial cells**. *Ovarian Cyst* - An **ovarian cyst** is a general term for a fluid-filled sac within the ovary and is typically **benign**. - While some cysts may contain mucinous material, simple ovarian cysts are not inherently malignant and do not commonly cause **pseudomyxoma peritonei**. *Ovarian dermoid* - An **ovarian dermoid**, or mature cystic teratoma, consists of tissues from all three germ layers and often contains hair, teeth, or sebaceous material. - Though they can rupture and cause chemical peritonitis, they are **rarely associated with pseudomyxoma peritonei**, which specifically involves mucin. *Serous cystadenocarcinoma* - **Serous cystadenocarcinoma** is the most common type of ovarian cancer but typically produces a watery, serous fluid rather than mucin. - While it can spread widely throughout the peritoneum, it does not lead to **pseudomyxoma peritonei**, which is characterized by the accumulation of gelatinous mucinous material.

Q: Which of the following testicular tumors is not a germ cell neoplasm?

Sertoli cell tumor. ***Sertoli cell tumor*** - Sertoli cell tumors are classified as **sex-cord stromal tumors** [1][2], not germ cell neoplasms, and arise from **Sertoli cells** in the testis. - They are characterized by **hormonally active** properties and may lead to conditions like **gynecomastia** due to estrogen production. *Seminoma* - Seminomas are a type of **germ cell tumor** [2][3], derived from the germ cells in the testes, and typically present with **elevated AFP** and **hCG** levels. - Known for their **slow growth** and better prognosis compared to non-seminomatous germ cell tumors. *Yolk sac tumor* - Also a germ cell neoplasm [3], yolk sac tumors typically produce **alpha-fetoprotein (AFP)**, indicating their germinal origin. - Commonly occur in **younger males** and present as a **rapidly growing** tumor with a poor prognosis if not treated early. *Teratoma* - Teratomas are categorized as germ cell tumors [3] that can contain differentiated tissues and arise from **primitive germ cells**. - They are generally classified as either **mature** or **immature**, with the immature type being more aggressive and occurring primarily in **younger patients**. **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. 513-514. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Diseases Of The Urinary And Male Genital Tracts, pp. 510-512. [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. 979-980.

Q: Which of the following breast lesions is associated with the HIGHEST risk of developing invasive breast cancer?

Atypical hyperplasia. ***Correct: Atypical hyperplasia*** - **Atypical hyperplasia** (either atypical ductal hyperplasia [ADH] or atypical lobular hyperplasia [ALH]) represents a proliferative lesion with some, but not all, features of carcinoma in situ [1] - Associated with a **4-5 times greater risk** of developing invasive breast cancer compared to the general population - Characterized by disordered architectural patterns and cellular atypia, indicating a **significant increased risk** for future malignancy [1] - Considered a high-risk lesion requiring close surveillance *Incorrect: Sclerosing adenosis* - This is a **benign proliferative lesion** characterized by increased glandular elements and stromal fibrosis - Confers only a **slightly increased risk (1.5-2 times)** of breast cancer - While it can sometimes mimic carcinoma on imaging, it is generally considered a **low-risk lesion** *Incorrect: Simple fibroadenoma* - A **simple fibroadenoma** is a benign tumor composed of both glandular and stromal tissue - **Does not increase the risk** of breast cancer - Typically presents as **well-circumscribed, mobile masses** and is among the most common benign breast lesions *Incorrect: Florid hyperplasia* - Also known as **usual ductal hyperplasia without atypia** - Involves an increase in the number of epithelial cells within the ductal lumen but lacks cellular atypia - Carries a **minimal increased risk (1.5-2 times)** for developing invasive breast cancer - The absence of atypia distinguishes it from the higher-risk atypical hyperplasia **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1054-1056.

Question 1

Not a histological marker for choriocarcinoma:

Accepted Answer

Villous

Answer

Cytotrophoblast

Answer

Syncytiotrophoblast

Answer

Bizarre nuclei

Question 2

Villous pattern is lost in which condition?

Accepted Answer

Choriocarcinoma

Answer

Partial mole

Answer

Invasive mole

Answer

Hydatidiform mole

Question 3

Which of the following ovarian neoplasms is MOST commonly associated with pseudomyxoma peritonei when it arises from ovarian primaries?

Accepted Answer

Mucinous cystadenocarcinoma

Answer

Ovarian dermoid

Answer

Ovarian Cyst

Answer

Serous cystadenocarcinoma

Question 4

Which of the following testicular tumors is not a germ cell neoplasm?

Accepted Answer

Sertoli cell tumor

Answer

Yolk sac tumor

Answer

Seminoma

Answer

Teratoma

Question 5

Which of the following breast lesions is associated with the HIGHEST risk of developing invasive breast cancer?

Accepted Answer

Atypical hyperplasia

Answer

Sclerosing adenosis

Answer

Simple fibroadenoma

Answer

Florid hyperplasia

Reproductive Pathology — MCQs

Reproductive Pathology — MCQs

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