Reproductive Pathology Practice Questions

Q: Which of the following benign breast lesions is associated with a moderately increased risk of invasive breast carcinoma?

Atypical lobular hyperplasia. **Explanation:** The risk of developing invasive breast carcinoma is categorized based on the histological features of benign breast lesions. This classification is a high-yield topic for NEET-PG. **1. Why Atypical Lobular Hyperplasia (ALH) is correct:** ALH falls under the category of **Atypical Hyperplasia (Proliferative disease with atypia)**. These lesions possess some, but not all, features of carcinoma in situ [1]. They are associated with a **moderately increased risk (4 to 5-fold)** of developing invasive cancer in either breast [1]. This category also includes Atypical Ductal Hyperplasia (ADH). **2. Analysis of Incorrect Options:** * **Sclerosing adenosis (Option A):** This is a **Proliferative disease without atypia**. It carries only a **mildly increased risk (1.5 to 2-fold)**. Other examples include radial scars and complex sclerosing lesions. * **Apocrine metaplasia (Option C):** This is a feature of **Non-proliferative breast changes** (Fibrocystic changes). It carries **no increased risk** of malignancy. * **Squamous metaplasia (Option D):** Usually seen in the lactiferous ducts (e.g., Zuska’s disease/SMLO), it is a reactive process and is **not associated** with an increased risk of invasive carcinoma. **Clinical Pearls for NEET-PG:** * **No Risk (1x):** Cysts, apocrine metaplasia, mild hyperplasia, fibroadenoma (without complex features). * **Slight Risk (1.5–2x):** Sclerosing adenosis, papillomatosis, moderate/florid hyperplasia without atypia. * **Moderate Risk (4–5x):** ADH and ALH [1]. * **High Risk (8–10x):** LCIS and DCIS (Carcinoma in situ). * **Note:** If a patient with atypical hyperplasia has a positive family history, the risk can increase up to 10-fold. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1054-1056.

Q: Which of the following genes has been most closely associated with familial cases of ovarian cancer?

BRCA1. **Explanation:** **Correct Option: A (BRCA1)** The **BRCA1** (Breast Cancer 1) gene, located on chromosome **17q21**, is a tumor suppressor gene involved in DNA repair via homologous recombination. Mutations in BRCA1 are the most common cause of hereditary breast and ovarian cancer syndromes. Women with a BRCA1 mutation have a significantly higher lifetime risk of developing epithelial ovarian cancer (approx. 40%) compared to those with BRCA2 mutations (approx. 15%) [1]. These cancers are typically high-grade serous carcinomas. **Incorrect Options:** * **B. WT1 (Wilms Tumor 1):** Located on chromosome 11p13, this gene is primarily associated with **Wilms tumor** (nephroblastoma) in children and certain syndromes like WAGR and Denys-Drash syndrome. * **C. NF2 (Neurofibromin 2):** Located on chromosome 22q12, mutations lead to **Neurofibromatosis Type 2**, classically characterized by bilateral acoustic neuromas (vestibular schwannomas) and meningiomas. * **D. VHL (Von Hippel-Lindau):** Located on chromosome 3p25, this gene is associated with VHL syndrome, which presents with **Renal Cell Carcinoma (clear cell type)**, hemangioblastomas, and pheochromocytomas [2]. **High-Yield Clinical Pearls for NEET-PG:** * **BRCA1 vs. BRCA2:** BRCA1 is on Chromosome **17**; BRCA2 is on Chromosome **13**. * **Male Breast Cancer:** More strongly associated with **BRCA2** than BRCA1. * **Prophylaxis:** Bilateral salpingo-oophorectomy is often recommended for mutation carriers after completion of childbearing to reduce risk [1]. * **Treatment:** Ovarian cancers with BRCA mutations are particularly sensitive to **PARP inhibitors** (e.g., Olaparib) due to "synthetic lethality." **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1058-1059. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 298-300.

Q: All changes occur in a fibroid uterus. Except?

Squamous metaplasia. **Explanation:** The correct answer is **Squamous metaplasia**. Leiomyomas (fibroids) are benign tumors derived from the **smooth muscle cells** of the myometrium [1]. Squamous metaplasia is a process where one adult epithelial cell type is replaced by another (e.g., columnar to squamous). Since fibroids are mesenchymal (connective tissue) tumors and not epithelial, they do not undergo squamous metaplasia. Squamous metaplasia is typically seen in the cervix or the endometrial lining, but not within the substance of a leiomyoma. **Analysis of Incorrect Options:** * **Atrophy (A):** Fibroids are estrogen-dependent. Following menopause or during treatment with GnRH analogues, the lack of estrogen leads to a reduction in cell size (atrophy) and shrinkage of the tumor. * **Hyaline Degeneration (C):** This is the **most common** type of degeneration in fibroids. The smooth muscle is replaced by homogenous, eosinophilic collagenous tissue [2]. * **Calcification (D):** Often occurring after menopause (secondary to circulatory changes), this is known as "calcareous degeneration." It results in a "womb stone" appearance on X-ray. **Clinical Pearls for NEET-PG:** * **Most common degeneration:** Hyaline degeneration. * **Most common degeneration during pregnancy:** Red degeneration (Carneous degeneration), caused by rapid growth leading to venous thrombosis and infarction. * **Malignant transformation:** Leiomyosarcomas almost always arise *de novo* and NOT from pre-existing fibroids. [2] * **Cystic degeneration:** Occurs when hyaline tissue liquefies; often mimics pregnancy or ovarian cysts on ultrasound. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 276-278. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1024-1025.

Q: How does seminoma typically spread?

Lymphatics. **Explanation:** **1. Why Lymphatics is Correct:** Seminoma, the most common germ cell tumor (GCT) of the testis, follows a predictable pattern of spread. Like most carcinomas (and unlike most sarcomas), seminomas primarily spread via the **lymphatic system**. The lymphatic drainage of the testes follows the path of the testicular arteries back to their origin from the aorta. Therefore, the primary site of metastasis is the **retroperitoneal para-aortic lymph nodes** [1]. **2. Why Other Options are Incorrect:** * **Hematogenous route:** While non-seminomatous germ cell tumors (NSGCTs), particularly choriocarcinoma, frequently spread via the blood to the lungs and liver, seminomas rarely do so in the early stages [1]. * **Direct route/Spermatic cord:** While local invasion into the tunica albuginea or spermatic cord can occur (T-staging), it is not the *typical* or primary mode of systemic dissemination. **3. NEET-PG High-Yield Pearls:** * **Lymphatic Exception:** If a patient has a history of orchiopexy or scrotal surgery, the lymphatic drainage may shift to the **inguinal lymph nodes** instead of the para-aortic nodes. * **Radiosensitivity:** Seminomas are exquisitely **radiosensitive** and have an excellent prognosis (95% cure rate in early stages). * **Tumor Markers:** Seminomas may show elevated **hCG** (if syncytiotrophoblasts are present) but **never** show elevated AFP [2]. An elevated AFP in a suspected seminoma automatically reclassifies it as a Mixed Germ Cell Tumor. * **Microscopy:** Look for "Fried egg" appearance (clear cytoplasm, central nuclei) and fibrous septa infiltrated with **T-lymphocytes** [2]. **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. 510-512. [2] 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 is the commonest genetic mutation in a 50-year-old obese female presenting with postmenopausal bleeding and diagnosed with endometrial cancer?

PTEN. **Explanation:** The clinical presentation describes a classic case of **Type I Endometrial Carcinoma** (Endometrioid adenocarcinoma). This type typically occurs in peri- or postmenopausal women and is strongly associated with obesity, which leads to chronic unopposed estrogen stimulation. **Why PTEN is correct:** The **PTEN (Phosphatase and Tensin homolog)** gene is a tumor suppressor gene located on chromosome 10q23. Mutations in PTEN are the most common genetic alteration in Type I endometrial cancer, occurring in **30–80%** of cases. It is often an early event in carcinogenesis, frequently seen even in the precursor lesion, atypical endometrial hyperplasia. **Analysis of Incorrect Options:** * **A. P53:** Mutations in the *TP53* gene are the hallmark of **Type II Endometrial Carcinoma** (Serous and Clear cell types). These occur in older, non-obese women, are estrogen-independent, and carry a much poorer prognosis. * **C. CHD4:** While mutations in *CHD4* (Chromodomain Helicase DNA Binding Protein 4) are identified in serous carcinomas, they are significantly less common than PTEN in the endometrioid subtype. * **D. Beta-catenin:** Mutations in *CTNNB1* (encoding Beta-catenin) occur in about 15–20% of Type I cases. While relevant, it is not the *most* common mutation compared to PTEN. **High-Yield Clinical Pearls for NEET-PG:** * **Type I (Endometrioid):** Estrogen-dependent, associated with obesity/PCOS, PTEN mutation (most common), Microsatellite Instability (MSI), and KRAS. Good prognosis. * **Type II (Serous/Clear Cell):** Estrogen-independent, associated with p53 mutation and HER2/neu amplification. Poor prognosis. * **Lynch Syndrome:** Always suspect if a young patient (<50 years) presents with endometrial cancer; it involves germline mutations in DNA mismatch repair (MMR) genes (MLH1, MSH2, MSH6, PMS2).

Question 1

Which of the following benign breast lesions is associated with a moderately increased risk of invasive breast carcinoma?

Accepted Answer

Atypical lobular hyperplasia

Answer

Sclerosing adenosis

Answer

Apocrine metaplasia

Answer

Squamous metaplasia

Question 2

Which of the following genes has been most closely associated with familial cases of ovarian cancer?

Accepted Answer

BRCA1

Answer

WT1

Answer

NF2

Answer

VHL

Question 3

A 52-year-old perimenopausal woman has had vaginal bleeding for a week. She has no medical problems and takes no medications. Hysteroscopy is performed and there is a single, 2-cm, smooth, soft mass protruding into the endometrial cavity. Biopsies are taken. What is the microscopic examination of this lesion most likely to show?

Accepted Answer

Endometrial glands resembling stratum basalis

Answer

Endocervical glands with squamous metaplasia

Answer

Papillae with marked cellular atypia

Answer

Smooth muscle cells in bundles

Question 4

Women carrying the BRCA1 gene have a higher likelihood of developing which type of breast carcinoma?

Accepted Answer

Medullary

Answer

Lobular

Answer

Colloid

Answer

Secretory

Question 5

All changes occur in a fibroid uterus. Except?

Accepted Answer

Squamous metaplasia

Answer

Atrophy

Answer

Hyaline degeneration

Answer

Calcification

Question 6

What is the histological type of cervical cancer that is most sensitive to radiotherapy?

Accepted Answer

Squamous cell carcinoma

Answer

Adenocarcinoma

Answer

Endometrioid carcinoma

Answer

Mixed variety

Question 7

How does seminoma typically spread?

Accepted Answer

Lymphatics

Answer

Hematogenous route

Answer

Direct route

Answer

Directly via the spermatic cord

Question 8

Arrange the following in increasing order for risk of malignancy: Fibroadenoma, Sclerosing adenosis, Atypical ductal hyperplasia, Lobular carcinoma in situ.

Accepted Answer

Fibroadenoma, Sclerosing adenosis, Atypical ductal hyperplasia, Lobular carcinoma in situ

Answer

Sclerosing adenosis, Fibroadenoma, Atypical ductal hyperplasia, Lobular carcinoma in situ

Answer

Fibroadenoma, Sclerosing adenosis, Lobular carcinoma in situ, Atypical ductal hyperplasia

Answer

Sclerosing adenosis, Fibroadenoma, Lobular carcinoma in situ, Atypical ductal hyperplasia

Question 9

A 30-year-old patient presents with testicular hypoechoic mass and back pain. Which tumor marker is most appropriate?

Accepted Answer

AFP (Alpha-fetoprotein)

Answer

Calcitonin

Answer

CA 19-9

Answer

CEA (Carcinoembryonic antigen)

Question 10

Which of the following is the commonest genetic mutation in a 50-year-old obese female presenting with postmenopausal bleeding and diagnosed with endometrial cancer?

Accepted Answer

PTEN

Answer

P53

Answer

CHD4

Answer

Beta catenin

Reproductive Pathology — MCQs

Reproductive Pathology — MCQs

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