Reproductive Pathology Practice Questions

Q: This syndrome is an example of

Testicular dysgenesis. ***Testicular dysgenesis*** - **Klinefelter syndrome (47,XXY)** represents testicular dysgenesis due to abnormal development and function of the testes from birth. - Characterized by **hypogonadism**, **infertility**, and **gynecomastia** resulting from defective testicular hormone production and spermatogenesis. *Male pseudohermaphroditism* - Refers to individuals with **46,XY karyotype** but abnormal male sexual development due to defects in **androgen synthesis** or **receptor function**. - Klinefelter syndrome has **47,XXY karyotype** with normal androgen receptors, not defective masculinization pathways. *Female pseudohermaphroditism* - Occurs in individuals with **46,XX karyotype** who develop **masculinized external genitalia** due to excess **androgen exposure**. - Klinefelter syndrome involves **male karyotype components** with primary testicular failure, not female chromosomal constitution. *True hermaphroditism* - Extremely rare condition where individuals possess both **ovarian and testicular tissue** simultaneously. - Klinefelter syndrome has only **testicular tissue** (though dysfunctional), without any ovarian components present.

Q: What is the most common malignant testicular neoplasm?

Seminoma. **Explanation:** **Seminoma** is the most common malignant testicular neoplasm, accounting for approximately 40–50% of all germ cell tumors (GCTs). It typically presents in the 4th decade of life (ages 30–40). Seminomas are characterized by their slow growth, late metastasis, and exquisite sensitivity to radiotherapy. **Analysis of Options:** * **A. Teratoma:** While common in children (mature type), in adults, they are usually part of mixed germ cell tumors and are considered malignant. They are less frequent than pure seminomas. * **C. Choriocarcinoma:** This is the most aggressive but rarest form of testicular cancer. It is characterized by early hematogenous spread and very high levels of β-hCG. * **D. Lymphoma:** This is the most common testicular tumor in men **over the age of 60**. It is usually a secondary manifestation of systemic Non-Hodgkin Lymphoma rather than a primary germ cell tumor. **High-Yield Clinical Pearls for NEET-PG:** 1. **Tumor Markers:** Seminomas are usually associated with normal AFP levels. If AFP is elevated, a non-seminomatous component (like Yolk Sac Tumor) must be suspected. LDH is often used as a marker for tumor burden in seminomas. 2. **Microscopy:** Classic seminoma shows "large polyhedral cells with clear cytoplasm (glycogen-rich) and distinct cell borders," arranged in lobules separated by fibrous septa containing **lymphocytic infiltrates**. 3. **Risk Factor:** Cryptorchidism (undescended testis) is the most significant risk factor; orchiopexy reduces the risk of malignancy but does not eliminate it. 4. **Management:** The initial step for any suspected testicular malignancy is **Radical Inguinal Orchidectomy**. Trans-scrotal biopsy is strictly contraindicated due to the risk of lymphatic seeding to inguinal nodes.

Q: Struma ovarii is a type of:

Teratoma. **Explanation:** **Struma ovarii** is a highly specialized or monodermal form of a **Mature Cystic Teratoma** (Germ Cell Tumor). By definition, it is a teratoma in which thyroid tissue comprises more than 50% of the tumor mass. 1. **Why Teratoma is correct:** Teratomas are germ cell tumors derived from all three germ layers (ectoderm, mesoderm, and endoderm). Struma ovarii represents an extreme case of endodermal differentiation where thyroid tissue predominates. 2. **Why other options are incorrect:** * **Metastatic tumor:** These are secondary tumors (e.g., Krukenberg tumor) spreading from sites like the GI tract or breast. Struma ovarii is a primary ovarian tumor. * **Sex cord tumor:** These arise from the ovarian stroma (e.g., Granulosa cell tumor, Sertoli-Leydig tumor) and often produce hormones like estrogen or androgens, not thyroid tissue. * **Surface epithelial tumor:** These arise from the ovarian lining (e.g., Serous or Mucinous cystadenoma) and are the most common type of ovarian neoplasms, but they do not contain thyroid elements. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Presentation:** Most are asymptomatic, but 5–10% of patients present with clinical **hyperthyroidism** (thyrotoxicosis). * **Imaging:** On ultrasound/CT, it may appear as a complex mass with a "struma pearl" (solid, vascularized component). * **Ascites:** Interestingly, about 1/3rd of cases are associated with ascites, and rarely, it can present as **Pseudo-Meigs Syndrome**. * **Malignancy:** While usually benign, the thyroid tissue can rarely undergo malignant transformation (most commonly Papillary Thyroid Carcinoma).

Q: Arias-Stella reaction is not seen in which of the following conditions?

Salpingitis isthmica nodosa. **Explanation:** The **Arias-Stella reaction** is a benign, physiological change in the endometrial glands characterized by nuclear hypertrophy, hyperchromasia, and cytoplasmic vacuolation. It occurs due to the **prolonged hormonal stimulation** (primarily progesterone) associated with the presence of viable or non-viable **trophoblastic tissue** anywhere in the body. **Why Salpingitis Isthmica Nodosa (SIN) is the correct answer:** SIN is a condition characterized by nodular thickening of the isthmic portion of the fallopian tube due to the diverticula of the tubal epithelium into the muscularis layer. It is associated with infertility and an increased risk of ectopic pregnancy, but it is **not** a pregnancy-related condition itself. Since there is no trophoblastic tissue or pregnancy-associated hormonal surge in SIN, the Arias-Stella reaction is not seen. **Analysis of Incorrect Options:** * **Ovarian and Interstitial Pregnancy:** Both are forms of ectopic pregnancy. The presence of trophoblastic tissue in these conditions triggers the endometrial response, leading to the Arias-Stella reaction. * **Molar Pregnancy:** This is a gestational trophoblastic disease. The high levels of HCG and progesterone associated with molar tissue frequently induce these endometrial changes. **NEET-PG High-Yield Pearls:** * **Key Feature:** It can be mistaken for **clear cell carcinoma** of the endometrium due to its cellular atypia; however, the absence of mitosis helps differentiate it. * **Clinical Significance:** It is most commonly associated with **Ectopic Pregnancy** (found in ~50-70% of cases) but can also be seen in intrauterine pregnancy, molar pregnancy, and even after Clomiphene Citrate therapy. * **Location:** While typically seen in the endometrium, it can rarely occur in the fallopian tube or cervix.

Question 1

This syndrome is an example of

Accepted Answer

Testicular dysgenesis

Answer

Male pseudohermaphroditism

Answer

Female pseudohermaphroditism

Answer

True hermaphroditism

Question 2

What is the most common malignant testicular neoplasm?

Accepted Answer

Seminoma

Answer

Teratoma

Answer

Choriocarcinoma

Answer

Lymphoma

Question 3

Struma ovarii is a type of:

Accepted Answer

Teratoma

Answer

Metastatic tumor

Answer

Sex cord tumor

Answer

Surface epithelial tumor

Question 4

A 46-year-old woman undergoes an abdominal hysterectomy for a fibroid uterus. The surgeon requests a frozen section on the tumor, which is deferred due to the lesion's degree of cellularity. Which of the following criteria will be used by the pathologist in determining benignancy versus malignancy in permanent sections?

Accepted Answer

Mitotic rate

Answer

Cell pleomorphism

Answer

Cell necrosis

Answer

Nucleus-to-cytoplasm ratio

Question 5

Which carcinoma of the breast is not invasive?

Accepted Answer

Comedo carcinoma

Answer

Schirrhous carcinoma

Answer

Lobular carcinoma

Answer

Paget's disease of the nipple

Question 6

A 75-year-old female presents with vaginal spotting. She has been postmenopausal for 25 years and is not taking hormones. Ultrasound reveals a mass in the uterine fundus. Pathologic examination of the removed uterus after hysterectomy shows a malignant tumor of the endometrial glands and stroma. What is the most likely diagnosis?

Accepted Answer

Malignant mixed mullerian tumor

Answer

Endolymphatic stromal myosis

Answer

Endometrial carcinoma

Answer

Endometrial stromal sarcoma

Question 7

What is the cause for nipple retraction in breast carcinoma?

Accepted Answer

Infiltration of ducts

Answer

Blocking of lymphatics

Answer

Involvement of the Cooper's ligament

Answer

Skin infiltration

Question 8

Arias-Stella reaction is not seen in which of the following conditions?

Accepted Answer

Salpingitis isthmica nodosa

Answer

Ovarian pregnancy

Answer

Molar pregnancy

Answer

Interstitial pregnancy

Question 9

With regard to the malignant behavior of leiomyosarcoma, what is the most important criterion?

Accepted Answer

The number of mitoses per high power field

Answer

Blood vessel penetration by tumor cells

Answer

Tumor cells in lymphatic channels

Answer

Lymphocyte infiltration

Question 10

Secondary deposits from prostatic carcinoma are commonest in which of the following organs?

Accepted Answer

Bone

Answer

Kidney

Answer

Liver

Answer

Brain

Reproductive Pathology — MCQs

Reproductive Pathology — MCQs

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