Reproductive Pathology Practice Questions

Q: All are true regarding testicular tumors except?

Choriocarcinoma is not a germ cell tumor.. ### Explanation **1. Why Option C is the Correct Answer (The False Statement):** Testicular tumors are primarily classified into **Germ Cell Tumors (GCTs)**, which account for ~95% of cases, and Sex Cord-Stromal Tumors. GCTs are further divided into **Seminomas** and **Non-Seminomatous Germ Cell Tumors (NSGCTs)**. Choriocarcinoma is a highly aggressive subtype of **NSGCT**. Therefore, the statement that it is "not a germ cell tumor" is medically incorrect. **2. Analysis of Other Options:** * **Option A:** Seminoma is indeed the most common pure germ cell tumor, typically occurring in the 4th decade of life. It is highly radiosensitive and has an excellent prognosis. * **Option B:** While GCTs are common in young men, **Lymphoma** is the most common testicular malignancy in men **over the age of 60**. It is usually a secondary manifestation of Systemic Diffuse Large B-cell Lymphoma. * **Option D:** Embryonal carcinoma is a major subtype of NSGCT. It is characterized by rapid growth, early hematogenous spread, and is often a component of mixed germ cell tumors. **3. High-Yield Clinical Pearls for NEET-PG:** * **Tumor Markers:** * **Yolk Sac Tumor:** Elevated Alpha-Fetoprotein (AFP) – *Pathognomonic finding: Schiller-Duval bodies.* * **Choriocarcinoma:** Markedly elevated beta-hCG (associated with hematogenous spread to lungs). * **Seminoma:** Never produces AFP. * **Risk Factor:** Cryptorchidism (undescended testis) is the most significant risk factor. Orchiopexy reduces the risk of trauma/torsion but does not completely eliminate the risk of malignancy. * **Lymphatic Spread:** Testicular tumors spread to **Para-aortic lymph nodes** (not inguinal nodes, unless the scrotum is involved). * **Investigation of Choice:** Scrotal Ultrasound followed by Contrast-Enhanced CT (CECT) for staging. **Biopsy is contraindicated** due to the risk of scrotal seeding.

Q: All of the following ovarian neoplasms secrete hormones, except?

Dysgerminoma. **Explanation:** The core concept tested here is the distinction between **functioning (hormone-secreting)** and **non-functioning** ovarian tumors. **Why Dysgerminoma is the correct answer:** Dysgerminoma is the most common germ cell tumor of the ovary. It is typically **hormonally inert**, meaning it does not produce estrogen, androgens, or progesterone. While it is a classic marker for **LDH (Lactate Dehydrogenase)** and occasionally produces low levels of hCG (if syncytiotrophoblastic giant cells are present), it does not secrete steroid hormones that cause systemic endocrine effects. **Analysis of Incorrect Options:** * **Granulosa Cell Tumor:** A sex cord-stromal tumor known for secreting high levels of **Estrogen**. Clinical presentations include precocious puberty in children or postmenopausal bleeding/endometrial hyperplasia in adults. (Marker: Inhibin). * **Hilus Cell Tumor:** A subtype of Leydig cell tumor. These are pure steroid cell tumors that secrete **Androgens** (testosterone), leading to rapid virilization (hirsutism, clitoromegaly). * **Theca Cell Tumor (Thecoma):** Another sex cord-stromal tumor that is almost always benign and characteristically produces **Estrogen**. **NEET-PG High-Yield Pearls:** 1. **Dysgerminoma Markers:** LDH (Best), Placental Alkaline Phosphatase (PLAP), and hCG (only if syncytiotrophoblastic cells are present). 2. **Most common hormone-secreting tumor:** Granulosa cell tumor (Estrogen). 3. **Struma Ovarii:** A specialized teratoma that secretes **Thyroid hormone**, leading to hyperthyroidism. 4. **Sertoli-Leydig Cell Tumor:** The most common virilizing (Androgen-secreting) tumor of the ovary.

Q: What is the most malignant testicular tumor?

Choriocarcinoma. **Explanation:** In testicular germ cell tumors (GCTs), **Choriocarcinoma** is recognized as the most aggressive and malignant subtype. The underlying medical concept for its high malignancy is its early and extensive **hematogenous spread** (via the bloodstream), often bypassing the typical lymphatic drainage patterns. By the time a primary testicular nodule is even palpable, widespread metastases to the lungs and brain are frequently already present. It is also characterized by extremely high levels of **beta-hCG**, which can lead to paraneoplastic syndromes like gynecomastia. **Analysis of Incorrect Options:** * **Embryonal Cell Carcinoma:** While more aggressive than seminomas and capable of rapid growth, it is less lethal than choriocarcinoma. It often presents as a component of mixed GCTs. * **Seminoma:** This is the most common testicular tumor but has the **best prognosis** because it is highly radiosensitive and tends to remain localized for longer periods. * **Teratoma:** In adults, these are considered malignant (unlike in children) but generally grow slowly and are less likely to metastasize early compared to choriocarcinoma. **High-Yield Clinical Pearls for NEET-PG:** * **Most common testicular tumor:** Seminoma. * **Most common tumor in infants/children:** Yolk Sac Tumor (associated with high Alpha-Fetoprotein/AFP and Schiller-Duval bodies). * **Tumor with the worst prognosis:** Choriocarcinoma. * **Tumor Marker:** Choriocarcinoma produces **only beta-hCG** (never AFP). If AFP is elevated, a mixed GCT must be suspected. * **Characteristic spread:** Choriocarcinoma is notorious for "hemorrhagic metastases," especially in the brain.

Q: In the Bethesda System for reporting cervical cytology, a low-grade squamous intraepithelial lesion (LSIL) involves which of the following?

CIN I. The Bethesda System (TBS) is the standardized nomenclature for reporting cervical cytology. It categorizes squamous cell abnormalities into two main tiers based on their clinical management and biological behavior: **LSIL** and **HSIL**. ### Explanation of the Correct Answer **LSIL (Low-grade Squamous Intraepithelial Lesion)** corresponds to **CIN I** (Cervical Intraepithelial Neoplasia Grade I). It represents a transient infection with Human Papillomavirus (HPV) and mild dysplasia involving the lower one-third of the cervical epithelium. Cytologically, LSIL is characterized by **koilocytosis** (perinuclear halo and nuclear wrinkling), which is the hallmark of HPV infection. ### Analysis of Incorrect Options * **B and C (CIN II and CIN III):** These are categorized under **HSIL (High-grade Squamous Intraepithelial Lesion)** in the Bethesda System. CIN II (moderate dysplasia) and CIN III (severe dysplasia/carcinoma in situ) carry a higher risk of progression to invasive cancer and require more aggressive management (e.g., LEEP or cold knife conization). * **D (Squamous Metaplasia):** This is a **physiological** process where the columnar epithelium of the endocervix is replaced by squamous epithelium at the transformation zone. It is a benign finding and not a dysplastic lesion. ### High-Yield Clinical Pearls for NEET-PG * **LSIL Management:** In women >25 years, LSIL is generally managed with colposcopy. However, in adolescents (21–24 years), observation with repeat cytology at 12 months is preferred due to high regression rates. * **CIN Classification:** * **CIN I:** Dysplasia in the lower 1/3rd of the epithelium. * **CIN II:** Dysplasia in the lower 2/3rd. * **CIN III:** Dysplasia involving >2/3rd or the full thickness (Carcinoma in situ). * **Key Marker:** **p16** is a surrogate biomarker for high-risk HPV; it is typically negative/focal in LSIL but shows strong, diffuse staining in HSIL.

Q: Which of the following tumors shows increased serum elevation of placental alkaline phosphatase and positive immunohistochemical staining for placental alkaline phosphatase?

Seminoma. **Explanation:** **Seminoma** is the most common germ cell tumor of the testis. It characteristically expresses **Placental Alkaline Phosphatase (PLAP)**, which serves as both a serum marker and a highly sensitive immunohistochemical (IHC) marker [1]. PLAP is an enzyme normally produced by the placenta; its elevation in a male patient is highly suggestive of a germ cell origin, specifically seminoma or dysgerminoma (its female counterpart). **Analysis of Options:** * **A. Seminoma (Correct):** Shows diffuse membranous positivity for PLAP, c-KIT (CD117), and OCT3/4 [1]. Serum PLAP levels are elevated in approximately 40-50% of cases. * **B. Hepatoblastoma:** This is a childhood liver tumor. Its primary markers are **Alpha-fetoprotein (AFP)** and Beta-catenin (nuclear staining). * **C. Hepatocellular Carcinoma (HCC):** The classic serum marker is **AFP**. IHC markers include HepPar-1, Glypican-3, and Arginase-1. * **D. Peripheral Neuroectodermal Tumor (PNET/Ewing Sarcoma):** These belong to the small round blue cell tumor family. The characteristic IHC marker is **CD99 (MIC2)**, and they are associated with the t(11;22) translocation. **NEET-PG High-Yield Pearls:** 1. **Seminoma vs. Non-Seminoma:** Seminomas *never* produce AFP. If AFP is elevated, it indicates a non-seminomatous component (like Yolk Sac Tumor). 2. **HCG in Seminoma:** About 10-15% of seminomas contain syncytiotrophoblastic giant cells which can cause a mild elevation in serum **beta-HCG** [1]. 3. **Classic IHC Triad for Seminoma:** PLAP (+), CD117 (+), and OCT3/4 (+). Note that CD30 is typically negative (positive in Embryonal Carcinoma) [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. 980-982.

Q: Which of the following statements regarding Krukenberg tumor is incorrect?

It is always secondary to a primary malignancy.. **Explanation:** A **Krukenberg tumor** is a specific type of metastatic signet-ring cell carcinoma of the ovary. **Why Option A is the correct (incorrect statement) answer:** While Krukenberg tumors are classically secondary to a primary malignancy elsewhere, the statement "It is **always** secondary" is technically incorrect in a pathological sense. Very rarely, a **primary** Krukenberg tumor can arise directly from the ovary (likely from ovarian mucinous cysts). For NEET-PG purposes, remember that while >99% are metastatic, "always" makes the statement false. **Analysis of other options:** * **Option B (The most common primary site is the ovary):** This is the **incorrect statement** regarding the origin. The primary site is almost always the **Stomach** (Gastrointestinal tract), followed by the colon and breast. The ovary is the *recipient* site, not the *primary* site. * **Option C (The tumor is often bilateral):** This is a **correct** statement. Approximately 80% of Krukenberg tumors present as bilateral, solid ovarian masses. * **Option D ('Signet ring' cells are characteristic):** This is a **correct** statement. Histologically, these tumors feature mucin-secreting cells that displace the nucleus to the periphery, creating a "signet ring" appearance. **NEET-PG High-Yield Pearls:** 1. **Most common primary:** Stomach (specifically the pylorus). 2. **Route of spread:** Traditionally thought to be retrograde lymphatic spread (not transcoelomic). 3. **Gross appearance:** Large, solid, multinodular, and usually bilateral ovarian enlargement. 4. **Histology:** Signet-ring cells in a dense, cellular stroma (Sarcomatoid stroma). 5. **Clinical hint:** A patient with dyspepsia or gastric symptoms presenting with bilateral adnexal masses.

Question 1

Which of the following causes apoptotic damage to sperms?

Accepted Answer

Chlamydia

Answer

Treponema pallidum

Answer

Clostridium

Answer

Hemophilus ducreyi

Question 2

All are true regarding testicular tumors except?

Accepted Answer

Choriocarcinoma is not a germ cell tumor.

Answer

Seminoma is the most common testicular tumor.

Answer

Lymphoma can occur in the testes.

Answer

Embryonal carcinoma is a non-seminomatous germ cell tumor.

Question 3

All of the following ovarian neoplasms secrete hormones, except?

Accepted Answer

Dysgerminoma

Answer

Granulosa cell tumor

Answer

Hilus cell tumor

Answer

Theca cell tumor

Question 4

What is the most malignant testicular tumor?

Accepted Answer

Choriocarcinoma

Answer

Embryonal cell carcinoma

Answer

Seminoma

Answer

Teratoma

Question 5

A 56-year-old woman presents with vaginal bleeding for 1 week. Her last menstrual period was 10 years ago. Physical examination reveals a palpable lower abdominal mass. Endometrial biopsy shows endometrial carcinoma, and an abdominal CT scan shows a 6-cm mass in the left ovary. A total abdominal hysterectomy is performed. Microscopically, the ovarian mass is identified as a granulosa-theca cell tumor producing estrogen. Which of the following best describes the relationship between the endometrial carcinoma and the estrogen-producing ovarian tumor?

Accepted Answer

Promotion of carcinogenesis by estrogen

Answer

Genetic susceptibility to tumorigenesis

Answer

Mutational inactivation of a tumor suppressor gene

Answer

Paraneoplastic syndrome

Question 6

In the Bethesda System for reporting cervical cytology, a low-grade squamous intraepithelial lesion (LSIL) involves which of the following?

Accepted Answer

CIN I

Answer

CIN II

Answer

CIN III

Answer

Squamous metaplasia

Question 7

What condition presents the maximum risk of invasive breast carcinoma?

Accepted Answer

Atypical ductal hyperplasia

Answer

Complex fibroadenoma

Answer

Sclerosing adenosis

Answer

Intraductal papilloma

Question 8

Which of the following tumors shows increased serum elevation of placental alkaline phosphatase and positive immunohistochemical staining for placental alkaline phosphatase?

Accepted Answer

Seminoma

Answer

Hepatoblastoma

Answer

Hepatocellular carcinoma

Answer

Peripheral neuroectodermal tumor

Question 9

Which type of breast carcinoma is characterized by a pushing border?

Accepted Answer

Medullary carcinoma

Answer

Invasive ductal carcinoma

Answer

Invasive lobular carcinoma

Answer

Mucinous carcinoma

Question 10

Which of the following statements regarding Krukenberg tumor is incorrect?

Accepted Answer

It is always secondary to a primary malignancy.

Answer

The most common primary site is the ovary.

Answer

The tumor is often bilateral.

Answer

'Signet ring' looking cells are characteristic.

Reproductive Pathology — MCQs

Reproductive Pathology — MCQs

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