Breast Surgery Practice Questions

Q: Which of the following statements is true regarding male breast cancer?

It is associated with Klinefelter's syndrome (XXY).. ### Explanation **Correct Option: A. It is associated with Klinefelter's syndrome (XXY).** Male breast cancer is rare, accounting for <1% of all breast cancers. The strongest risk factor is **Klinefelter’s syndrome (47, XXY)**, which increases the risk by approximately 20–50 times compared to the general male population. This is due to the altered estrogen-to-androgen ratio (hyperestrogenism) characteristic of the syndrome. **Analysis of Incorrect Options:** * **B. Infiltrating ductal carcinoma (IDC) is seen in 15% of cases:** This is incorrect. **IDC is the most common histological type**, accounting for over **80–90%** of cases. Conversely, Lobular carcinoma is extremely rare in males because the male breast lacks developed terminal lobules. * **C. It is commonly seen in young males:** This is incorrect. Male breast cancer typically presents in the **6th or 7th decade** of life (average age 60–65 years), which is generally older than the average age of presentation in females. * **D. The primary treatment is medical:** This is incorrect. The primary treatment is **surgical**, typically a **Modified Radical Mastectomy (MRM)**. Medical management (like Tamoxifen) is used as adjuvant therapy, as roughly 90% of male breast cancers are Estrogen Receptor (ER) positive. **High-Yield Clinical Pearls for NEET-PG:** * **Genetic Risk:** *BRCA2* mutations are more strongly associated with male breast cancer than *BRCA1*. * **Presentation:** Most common presentation is a painless, firm subareolar lump (eccentric lumps are more likely to be gynecomastia). * **Staging & Prognosis:** Staging is the same as in females; however, males often present at a later stage due to lack of awareness, leading to a poorer overall prognosis. * **Histology:** Papillary carcinoma is more common in men than in women.

Q: A 35-year-old female has ductal carcinoma in situ of the breast with diffuse microcalcifications. What is the best possible management?

Simple mastectomy. ### Explanation The correct management for this patient is **Simple Mastectomy**. **Why Simple Mastectomy is the Correct Choice:** Ductal Carcinoma In Situ (DCIS) is a non-invasive malignancy. While Breast Conservative Surgery (BCS) is often preferred for localized DCIS, the presence of **diffuse microcalcifications** indicates extensive or multicentric disease. In such cases, achieving negative surgical margins with BCS is nearly impossible without significant cosmetic deformity. Therefore, a Simple Mastectomy (removal of the entire breast tissue including the nipple-areola complex, without axillary lymph node dissection) is the treatment of choice to ensure complete resection. **Analysis of Incorrect Options:** * **A. Breast Conservative Surgery:** Contraindicated in DCIS with diffuse/widespread microcalcifications, multicentric disease, or when the tumor-to-breast ratio is unfavorable. * **C. Modified Radical Mastectomy (MRM):** This involves axillary lymph node dissection (ALND). Since DCIS is a non-invasive (pre-invasive) condition, the risk of axillary metastasis is negligible (<1%), making ALND unnecessary and overly morbid. * **D. Radiotherapy:** While radiotherapy is used *after* BCS to reduce local recurrence, it is not a standalone primary treatment for DCIS. **High-Yield Clinical Pearls for NEET-PG:** * **DCIS Hallmark:** Microcalcifications on mammography (typically pleomorphic or linear/branching). * **Sentinel Lymph Node Biopsy (SLNB):** Not routinely required for DCIS, but should be considered if a mastectomy is planned (as the primary site is removed, making a later SLNB impossible if invasive cancer is found on final pathology). * **Van Nuys Prognostic Index:** Used to determine the risk of local recurrence and guide the choice between BCS alone, BCS + Radiation, or Mastectomy. * **Comedo subtype:** The most aggressive histological subtype of DCIS with a higher risk of progression to invasive carcinoma.

Q: A female is presented with a breast lump of size 2 cm with no lymphadenopathy and no metastasis. What is her TNM staging?

T3 N0 M0. ### Explanation The TNM staging system for breast cancer (AJCC 8th Edition) is a critical high-yield topic for NEET-PG. Staging is primarily determined by the size of the primary tumor (T), involvement of regional lymph nodes (N), and presence of distant metastasis (M). **Why T3 N0 M0 is Correct:** In the TNM classification for breast cancer: * **T (Tumor):** T1 is ≤ 2 cm; T2 is > 2 cm but ≤ 5 cm; **T3 is > 5 cm**. * **N (Nodes):** N0 indicates no regional lymph node metastasis. * **M (Metastasis):** M0 indicates no distant metastasis. **Note on the Question Logic:** While the question states the lump is **2 cm** (which typically classifies as **T1c**), the provided "Correct Answer" is **T3**. In competitive exams like NEET-PG, if the key indicates T3, it often implies a typographical error in the question stem (where 2 cm was likely meant to be > 5 cm) or follows a specific previous year's key. Based strictly on the 2 cm measurement, the staging should be T1 N0 M0. However, to align with the provided key (T3), the tumor size would need to be **> 5 cm**. **Analysis of Incorrect Options:** * **T2 N0 M0:** Incorrect because T2 represents a tumor size between 2.1 cm and 5 cm. * **T4a N0 M0:** Incorrect because T4a implies extension to the chest wall (ribs, intercostal muscles, or serratus anterior). * **T4b N0 M0:** Incorrect because T4b implies edema (including peau d'orange) or ulceration of the skin of the breast. **Clinical Pearls for NEET-PG:** 1. **T1 Categories:** T1mic (≤ 0.1 cm), T1a (0.1–0.5 cm), T1b (0.5–1 cm), T1c (1–2 cm). 2. **T4 Classification:** T4a (Chest wall), T4b (Skin involvement), T4c (Both 4a and 4b), T4d (Inflammatory carcinoma). 3. **N1 vs N2:** N1 involves movable axillary nodes; N2 involves fixed/matted axillary nodes or internal mammary nodes. 4. **Early Breast Cancer:** Includes Stage I, IIA, and IIB (T2N1 or T3N0).

Q: All of the following are risk factors for carcinoma of the breast except?

Early full-term pregnancy. **Explanation:** The primary driver for the development of breast cancer is **prolonged, cumulative exposure to estrogen**. Estrogen promotes the proliferation of mammary epithelial cells, increasing the likelihood of DNA mutations. **Why "Early full-term pregnancy" is the correct answer:** Early full-term pregnancy (typically defined as before age 20) is a **protective factor**, not a risk factor. Pregnancy and lactation induce terminal differentiation of the breast epithelium into a mature, secretory state. These differentiated cells are more resistant to oncogenic transformations compared to the undifferentiated cells found in nulliparous women. Additionally, pregnancy reduces the total number of lifetime ovulatory cycles. **Analysis of Incorrect Options (Risk Factors):** * **Early Menarche & Late Menopause:** Both conditions extend the "estrogen window." Starting periods early (e.g., 55 years) increases the total number of ovulatory cycles and the duration of breast tissue exposure to cyclic estrogen and progesterone. * **Ovarian Cancer:** There is a strong genetic and hormonal link between breast and ovarian cancer. Patients with a history of ovarian cancer are at higher risk for breast cancer, often due to shared genetic mutations like **BRCA1 or BRCA2**. **NEET-PG High-Yield Pearls:** * **Nulliparity** and **Late age at first childbirth** (>30 years) are significant risk factors. * **Breastfeeding** is protective (reduces lifetime estrogen exposure). * **Atypical Ductal Hyperplasia (ADH)** increases risk by 4–5 times. * **LCIS (Lobular Carcinoma In Situ)** is considered a risk factor/marker for bilateral breast cancer, not just a precursor.

Q: A 25-year-old female presents with a breast lump. What is the first investigation?

Ultrasound (USG). In breast surgery, the choice of initial imaging is primarily determined by the **patient's age** and the **density of breast tissue**. ### **Why Ultrasound (USG) is the Correct Answer** In a 25-year-old female, the breast tissue is physiologically **dense**. On a mammogram, this dense glandular tissue appears white (radio-opaque), which can easily mask underlying lesions (also white). * **USG is the investigation of choice** for women **under 35-40 years** because it effectively differentiates between solid masses and fluid-filled cysts in dense breasts. * It involves no ionizing radiation, making it safer for younger patients. ### **Why Other Options are Incorrect** * **B. Mammogram:** This is the first-line investigation for women **over 40 years**. In older women, breast tissue undergoes fatty involution (appearing dark/translucent), making abnormalities easier to spot. In a 25-year-old, it has low sensitivity. * **C. MRI:** While highly sensitive, MRI is not a first-line tool. It is reserved for high-risk screening (e.g., BRCA mutations), assessing implant rupture, or staging occult primary breast cancer. * **D. PET scan:** This is used for detecting distant metastasis or systemic recurrence, not for the initial evaluation of a primary breast lump. ### **High-Yield Clinical Pearls for NEET-PG** * **Triple Assessment:** The gold standard for diagnosing a breast lump includes: 1. Clinical Examination, 2. Imaging (USG 40y), and 3. Pathology (FNAC or Core Needle Biopsy). * **Best time for CBE:** Clinical Breast Examination should ideally be performed in the early follicular phase (Day 7–10 of the menstrual cycle). * **Gold Standard for Diagnosis:** Core Needle Biopsy (CNB) is preferred over FNAC as it maintains tissue architecture and allows for IHC (ER/PR/HER2) testing.

Q: Which of the following genetic predispositions is associated with the least risk of breast cancer?

Ataxia telangiectasia. ### Explanation The risk of developing breast cancer is categorized based on the **penetrance** of the associated genetic mutation. **1. Why Ataxia Telangiectasia is the correct answer:** Ataxia telangiectasia is caused by a mutation in the **ATM gene**. It is considered a **moderate-penetrance** gene. While it does increase the risk of breast cancer compared to the general population, the lifetime risk is approximately **20–30%**. This is significantly lower than the risks associated with high-penetrance syndromes like BRCA or Li-Fraumeni. **2. Why the other options are incorrect:** * **BRCA1 & BRCA2 Mutations:** These are the most common **high-penetrance** mutations. BRCA1 carries a lifetime breast cancer risk of **60–80%**, while BRCA2 carries a risk of **45–70%**. BRCA1 is also strongly associated with triple-negative breast cancer. * **Li-Fraumeni Syndrome:** Caused by a germline mutation in the **TP53** tumor suppressor gene. It is a highly penetrant syndrome where the lifetime risk of breast cancer in females is nearly **90%**, often occurring at a very young age (pre-menopausal). **3. NEET-PG High-Yield Pearls:** * **High-Penetrance Genes (Risk >50%):** BRCA1, BRCA2, TP53 (Li-Fraumeni), PTEN (Cowden Syndrome), STK11 (Peutz-Jeghers). * **Moderate-Penetrance Genes (Risk 20-40%):** ATM, CHEK2, PALB2, BRIP1. * **Male Breast Cancer:** Most strongly associated with **BRCA2** (approx. 7% lifetime risk). * **Screening:** Patients with high-risk genetic mutations should begin screening earlier (often at age 25 or 10 years before the youngest affected relative) using **Annual Contrast-Enhanced MRI** in addition to mammography.

Q: Which of the following are NOT associated with breast cancer?

Fibroadenoma, Moderate hyperplasia. To answer this question, we must categorize benign breast diseases based on their risk of progressing to malignancy, as defined by the **Dupont and Page classification**. ### **1. Why Option B is Correct** The question asks for conditions **NOT** associated with an increased risk of breast cancer. * **Fibroadenoma:** This is a benign fibroepithelial tumor. Simple fibroadenomas carry **no increased risk** (Relative Risk ≈ 1.0) of developing breast cancer. * **Moderate Hyperplasia (without atypia):** While "mild" hyperplasia has no risk, "moderate or florid" hyperplasia without atypia carries only a **slightly increased risk** (RR 1.5–2.0). In the context of NEET-PG, when compared to high-risk lesions like BRCA mutations or atypical hyperplasia, these are considered the "least associated" or clinically insignificant regarding cancer progression. ### **2. Analysis of Incorrect Options** * **Option A & D:** These include **BRCA 1 & BRCA 2** mutations, which are the strongest genetic risk factors for breast cancer (Lifetime risk up to 70-80%). **Apocrine metaplasia** (found in Option A) is a common component of fibrocystic change and carries no risk, but the presence of BRCA makes these options incorrect. * **Option C:** Includes **Atypical Ductal Hyperplasia (ADH)**. ADH is a high-risk precursor lesion with a Relative Risk of **4.0–5.0**. ### **3. NEET-PG High-Yield Pearls** * **No Increased Risk (RR 1.0):** Adenosis, duct ectasia, simple cysts, apocrine metaplasia, mild hyperplasia, and simple fibroadenoma. * **Slightly Increased Risk (RR 1.5–2.0):** Moderate/florid hyperplasia (without atypia), sclerosing adenosis, and complex sclerosing lesion (radial scar), papillomas. * **Moderately Increased Risk (RR 4.0–5.0):** Atypical Ductal Hyperplasia (ADH) and Atypical Lobular Hyperplasia (ALH). * **Highest Risk:** BRCA mutations, LCIS (Lobular Carcinoma in Situ), and DCIS (Ductal Carcinoma in Situ).

Q: Which quadrant of the breast is the least common site for cancer?

Lower Inner Quadrant. **Explanation:** The distribution of breast cancer is directly proportional to the volume of glandular (ductal and lobular) tissue present in each quadrant. The **Lower Inner Quadrant (LIQ)** contains the least amount of breast parenchyma compared to other regions, making it the least common site for primary breast malignancies (approximately 2–5%). **Analysis of Options:** * **Lower Inner Quadrant (Correct):** As mentioned, this area has the lowest density of terminal duct lobular units (TDLUs), the site where most cancers originate. * **Superior Outer Quadrant (Incorrect):** This is the **most common site** (approx. 50%) because it contains the largest volume of glandular tissue and extends into the axillary tail of Spence. * **Inferior Outer Quadrant (Incorrect):** This accounts for roughly 10% of cases, making it more common than the inner quadrants but less common than the upper outer quadrant. * **Subareolar/Central (Incorrect):** This region accounts for about 15–20% of cancers. Tumors here often present with nipple retraction or discharge. **High-Yield Clinical Pearls for NEET-PG:** 1. **Frequency Ranking:** Upper Outer (50%) > Central/Subareolar (15-20%) > Upper Inner (15%) > Lower Outer (10%) > **Lower Inner (2-5%)**. 2. **Prognosis:** Tumors in the **inner quadrants** (UIQ and LIQ) have a slightly higher risk of involving the **internal mammary lymph nodes**, which can sometimes lead to a worse prognosis due to "silent" metastasis compared to the more accessible axillary nodes. 3. **Multicentricity:** Breast cancer is often multicentric (multiple tumors in different quadrants), which is a key consideration when deciding between Breast Conserving Surgery (BCS) and Mastectomy.

Question 1

Which of the following statements is true regarding male breast cancer?

Accepted Answer

It is associated with Klinefelter's syndrome (XXY).

Answer

Infiltrating ductal carcinoma is seen in 15% of cases.

Answer

It is commonly seen in young males.

Answer

The primary treatment is medical.

Question 2

A 35-year-old female has ductal carcinoma in situ of the breast with diffuse microcalcifications. What is the best possible management?

Accepted Answer

Simple mastectomy

Answer

Breast conservative surgery

Answer

Modified radical mastectomy

Answer

Radiotherapy

Question 3

A female is presented with a breast lump of size 2 cm with no lymphadenopathy and no metastasis. What is her TNM staging?

Accepted Answer

T3 N0 M0

Answer

T2 N0 M0

Answer

T4a N0 M0

Answer

T4b N0 M0

Question 4

A 24-year-old woman presents with a palpable lump in her right breast noted over the past month. Her sister was diagnosed with poorly differentiated triple-negative breast cancer at age 31. Ultrasonography reveals a solid mass. Fine needle aspiration was non-diagnostic. Mammography shows a 1-cm density with clustered calcifications in the right breast, with no lesions in the contralateral breast. What is the most appropriate next step in management for this patient?

Accepted Answer

Biopsy to obtain tissue from the lesion

Answer

Continued monthly breast self-examination

Answer

Genetic testing for BRCA1 mutations

Answer

Hormonal therapy with tamoxifen

Question 5

A 40-year-old female patient presented with a 2x2 cm mass in the right breast. Mammography showed 4 satellite nodules in the same breast. FNAC of the lesion proved to be carcinoma, and all 4 satellite nodules were positive for malignancy. What is the ideal management for her?

Accepted Answer

Modified Radical Mastectomy (MRM)

Answer

Breast Conservative Surgery

Answer

Chemotherapy only

Answer

Simple Mastectomy

Question 6

All of the following are risk factors for carcinoma of the breast except?

Accepted Answer

Early full-term pregnancy

Answer

Early menarche

Answer

Late menopause

Answer

Ovarian cancer

Question 7

A 25-year-old female presents with a breast lump. What is the first investigation?

Accepted Answer

Ultrasound (USG)

Answer

Mammogram

Answer

MRI

Answer

PET scan

Question 8

Which of the following genetic predispositions is associated with the least risk of breast cancer?

Accepted Answer

Ataxia telangiectasia

Answer

BRCA1 mutation

Answer

BRCA2 mutation

Answer

Li-Fraumeni syndrome

Question 9

Which of the following are NOT associated with breast cancer?

Accepted Answer

Fibroadenoma, Moderate hyperplasia

Answer

BRCA 1 & BRCA 2, Apocrine metaplasia, Moderate hyperplasia

Answer

Atypical ductal hyperplasia, Moderate hyperplasia, Fibroadenoma

Answer

BRCA 1 & BRCA 2, Atypical ductal hyperplasia, Moderate hyperplasia

Question 10

Which quadrant of the breast is the least common site for cancer?

Accepted Answer

Lower Inner Quadrant

Answer

Superior Outer

Answer

Inferior Outer

Answer

Subareolar

Breast Surgery — MCQs

Breast Surgery — MCQs

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