Breast Surgery Practice Questions

Q: Which of the following groups of lymph nodes is NOT involved in the lymphatic drainage of breast carcinoma?

Pretracheal. The lymphatic drainage of the breast is a high-yield topic in surgery, as it dictates the staging and surgical management of breast carcinoma. ### **Explanation of the Correct Answer** The question asks which group of lymph nodes is **not** typically involved in the primary lymphatic drainage of the breast. The **Pretracheal lymph nodes (Option B)** are located in the neck, anterior to the trachea, and primarily drain the thyroid gland, trachea, and larynx. They are not part of the standard lymphatic pathways for the breast. ### **Analysis of Incorrect Options** * **Axillary Lymph Nodes (Option C):** These are the primary site of drainage, receiving approximately **75%** of the lymph from the breast (primarily from the lateral quadrants). * **Internal Mammary Nodes (Option D):** These receive about **20-25%** of the drainage, primarily from the medial quadrants of the breast. * **Supraclavicular Nodes (Option A):** These are considered Level IV nodes in some classifications and represent a progression of disease from the axillary or internal mammary chains. In the TNM staging system, involvement of ipsilateral supraclavicular nodes is classified as **N3 disease**. ### **NEET-PG High-Yield Pearls** * **Sentinel Lymph Node (SLN):** The first node(s) to receive drainage from the tumor site. Biopsy of the SLN is the gold standard for axillary staging in clinically node-negative (cN0) patients. * **Rotter’s Nodes:** These are interpectoral nodes located between the pectoralis major and minor muscles. * **Berg’s Levels of Axillary Nodes:** * **Level I:** Lateral to pectoralis minor. * **Level II:** Behind pectoralis minor (includes Rotter’s nodes). * **Level III:** Medial to pectoralis minor (apical nodes). * **Most common site of distant metastasis:** Bone (specifically the lumbar spine via Batson’s plexus).

Q: Which of the following is LEAST related to breast cancer in females?

Ataxia telangiectasia. **Explanation:** The question asks for the condition **least** related to breast cancer. While all four options are associated with an increased risk of breast cancer, **Ataxia-telangiectasia (AT)** represents the lowest relative risk among the choices provided in a clinical and examination context. 1. **Why Ataxia-telangiectasia (Option D) is the correct answer:** AT is an autosomal recessive disorder caused by mutations in the **ATM gene**. While female carriers (heterozygotes) have a 2-to-3-fold increased risk of breast cancer compared to the general population, this risk is significantly lower than that associated with BRCA mutations or Li-Fraumeni syndrome. In the hierarchy of "high-penetrance" breast cancer genes, ATM is considered a **moderate-penetrance** gene. 2. **Analysis of Incorrect Options:** * **BRCA-1 (Option A):** A high-penetrance tumor suppressor gene. Lifetime risk of breast cancer is approximately **65-80%**. It is also strongly linked to ovarian cancer. * **BRCA-2 (Option B):** Similar to BRCA-1, it carries a high lifetime risk (**45-85%**). It is the most significant gene associated with **male breast cancer**. * **Li-Fraumeni Syndrome (Option C):** Caused by a germline mutation in the **TP53 gene**. It carries an extremely high risk of early-onset breast cancer (often before age 30), along with sarcomas, leukemia, and adrenocortical tumors. **NEET-PG High-Yield Pearls:** * **Most common gene** mutated in hereditary breast cancer: **BRCA-1**. * **Cowden Syndrome:** Mutation in **PTEN** gene; associated with breast cancer, thyroid cancer, and hamartomas. * **Peutz-Jeghers Syndrome:** Mutation in **STK11**; carries an increased risk of breast and GI cancers. * **Screening:** For BRCA carriers, annual MRI starting at age 25 and annual mammography starting at age 30 is recommended.

Q: What is the most common presentation of lobular carcinoma?

Breast mass. **Explanation:** Invasive Lobular Carcinoma (ILC) is the second most common type of breast cancer after Invasive Ductal Carcinoma (IDC). Despite its unique growth pattern, the **most common clinical presentation remains a palpable breast mass.** **Why "Breast Mass" is correct:** ILC is characterized by a "single-file" pattern of cell infiltration due to the loss of E-cadherin. Because it does not typically form a dense, circumscribed tumor, it often presents as a **vague thickening** or an ill-defined induration rather than a discrete, hard lump. However, in clinical practice and for examination purposes, this is categorized as a breast mass. **Analysis of Incorrect Options:** * **Nipple discharge:** This is more commonly associated with intraductal pathologies like ductal papilloma or ductal carcinoma in situ (DCIS), rather than lobular lesions. * **Mammographic calcification:** This is a classic feature of DCIS. ILC is notorious for being "mammographically silent" because it lacks a central mass effect and rarely produces microcalcifications, making it harder to detect on screening. * **Nipple retraction:** While this can occur if the tumor involves the subareolar area or causes significant desmoplasia, it is a late sign and not the primary presentation. **High-Yield Clinical Pearls for NEET-PG:** * **Molecular Hallmark:** Loss of **E-cadherin** expression (CDH1 gene mutation). * **Multicentricity & Bilaterality:** ILC has a much higher incidence of being bilateral and multicentric compared to IDC. * **Metastatic Pattern:** Unlike IDC, ILC tends to spread to unusual sites such as the **peritoneum, GI tract, and ovaries.** * **Imaging:** MRI is more sensitive than mammography for determining the true extent of ILC.

Q: Triple assessment of the breast includes all the following except?

Laboratory investigation. **Explanation:** The **Triple Assessment** is the gold standard protocol for the evaluation of any palpable breast lump. It is designed to achieve a diagnostic accuracy of over 99%. The three components are: 1. **Clinical Assessment (Option A):** This involves a detailed clinical history and a thorough physical examination (inspection and palpation) of both breasts and the axillary lymph nodes. 2. **Imaging (Option B):** The choice of imaging depends on the patient's age. * **Ultrasonography (USG):** Preferred in women ** 35 years**. 3. **Pathology/Histology (Option C):** This involves obtaining a tissue sample for microscopic examination. * **Fine Needle Aspiration Cytology (FNAC):** Provides cytological details. * **Core Needle Biopsy (CNB):** Provides histological architecture (preferred as it can distinguish between invasive and in-situ carcinoma and allows for ER/PR/HER2 testing). **Laboratory investigations (Option D)**, such as Complete Blood Count (CBC) or Liver Function Tests (LFT), are not part of the initial triple assessment used to diagnose a breast lump. While they may be used later for preoperative workup or metastatic screening, they do not contribute to the primary diagnosis of the lesion itself. **High-Yield Clinical Pearls for NEET-PG:** * **Accuracy:** If all three components of the triple assessment suggest malignancy, the positive predictive value is **>99.9%**. * **Discordance:** If there is a "discordant" result (e.g., imaging suggests cancer but biopsy is benign), an **Excisional Biopsy** is mandatory. * **Modified Triple Assessment:** Includes Clinical Exam, Imaging, and **Core Needle Biopsy** (replacing FNAC in modern practice).

Q: What is true about Paget's disease of the nipple?

There is always underlying carcinoma.. ### Explanation: Paget’s Disease of the Nipple Paget’s disease of the nipple is a rare manifestation of breast cancer characterized by an eczematous-like lesion of the nipple-areola complex. **1. Why Option A is Correct:** Paget’s disease is virtually always associated with an **underlying breast carcinoma**. In approximately 90-100% of cases, there is either an underlying **Infiltrating Ductal Carcinoma (IDC)** or **Ductal Carcinoma in Situ (DCIS)**. The disease occurs when malignant cells (Paget cells) migrate from the underlying lactiferous ducts into the epidermis of the nipple. **2. Why Other Options are Incorrect:** * **Option B:** Eczema of the nipple is typically **bilateral** and involves the areola first, often seen in younger, lactating women. In contrast, Paget’s disease is almost always **unilateral** and starts at the nipple. * **Option C:** Histology reveals **Paget cells**, which are large, pale, ovoid cells with prominent nucleoli and abundant granular cytoplasm. They are PAS-positive (diastase resistant). Giant cells are characteristic of granulomatous conditions, not Paget’s. * **Option D:** While it indicates an underlying malignancy, the prognosis of Paget’s disease itself depends entirely on the stage and nature of the underlying tumor, rather than being "highly malignant" in its own right. **Clinical Pearls for NEET-PG:** * **Clinical Presentation:** Persistent, unilateral, itchy, or crusting lesion of the nipple that does not respond to topical steroids. * **Key Diagnostic Feature:** Unlike simple eczema, Paget’s disease **destroys the nipple**. * **Diagnosis:** Confirmed by a **punch biopsy** or wedge biopsy of the nipple. * **Management:** Treatment follows the protocol for the underlying breast cancer (usually Modified Radical Mastectomy or Breast Conserving Surgery with radiotherapy).

Q: What is the most common type of cancer found in the male breast?

Infiltrating ductal carcinoma. **Explanation:** **1. Why Infiltrating Ductal Carcinoma (IDC) is correct:** Infiltrating Ductal Carcinoma (IDC) is the most common histological subtype of male breast cancer, accounting for approximately **85-90% of cases**. This is because the male breast primarily consists of rudimentary ductal elements without well-developed lobules. Since cancer arises from these pre-existing structures, ductal morphology is the predominant finding. **2. Why the other options are incorrect:** * **Lobular carcinoma in situ (LCIS) / Invasive Lobular Carcinoma:** These are extremely rare in males (less than 1-2%). The male breast lacks **acini and lobules** under normal physiological conditions. Lobular carcinoma usually only occurs in males if there is significant hormonal stimulation leading to lobular development (e.g., severe gynecomastia or estrogen therapy). * **Ductal carcinoma in situ (DCIS):** While DCIS does occur in males, it is far less common than the invasive (infiltrating) form at the time of diagnosis. Most male breast cancers present at a later stage as a palpable mass, by which time they have already become invasive. **3. High-Yield Clinical Pearls for NEET-PG:** * **Risk Factors:** The most significant risk factor is **BRCA2 mutation** (more common than BRCA1 in males) and **Klinefelter Syndrome (47, XXY)**. * **Presentation:** Usually presents as a painless, firm subareolar mass. Eccentric masses are more likely to be gynecomastia. * **Staging & Treatment:** Staging is the same as in females. The standard surgical treatment is **Modified Radical Mastectomy (MRM)** because the small size of the male breast makes breast-conserving surgery difficult. * **Prognosis:** Often worse than in females, primarily due to delayed diagnosis and early involvement of the skin and chest wall.

Question 1

Which of the following groups of lymph nodes is NOT involved in the lymphatic drainage of breast carcinoma?

Accepted Answer

Pretracheal

Answer

Supraclavicular

Answer

Axillary

Answer

Internal mammary

Question 2

Which of the following is LEAST related to breast cancer in females?

Accepted Answer

Ataxia telangiectasia

Answer

BRCA-1

Answer

BRCA-2

Answer

Li Fraumeni syndrome

Question 3

For which one of the following conditions is breast conservation surgery indicated in breast cancer?

Accepted Answer

T1 breast tumor

Answer

Multicentric tumor

Answer

Extensive in situ cancer

Answer

T4b breast tumor

Question 4

What is the most common presentation of lobular carcinoma?

Accepted Answer

Breast mass

Answer

Nipple discharge

Answer

Mammographic calcification

Answer

Nipple retraction

Question 5

Triple assessment of the breast includes all the following except?

Accepted Answer

Laboratory investigation

Answer

Clinical assessment

Answer

Imaging

Answer

Histology

Question 6

A 45-year-old female presents with a painless breast lump measuring 6.2x4.5 cm. A Trucut biopsy confirmed carcinoma of the breast. Surgical removal was performed, and the post-operative biopsy revealed carcinoma of the breast with high-grade necrosis and margins of 4 mm. Which of the following is indicated?

Accepted Answer

Adjuvant chemoradiotherapy

Answer

Adjuvant chemotherapy

Answer

Adjuvant radiotherapy

Answer

No additional treatment

Question 7

Which of the following are established risk factors for carcinoma of the breast?

Accepted Answer

Nulliparity, BRCA1 mutation, and Family history are true risk factors, while Multiparity is false.

Answer

Nulliparity, Multiparity, and BRCA1 mutation are true risk factors, while Family history is false.

Answer

Nulliparity is a false risk factor, while Multiparity, BRCA1 mutation, and Family history are true.

Answer

All listed factors are true risk factors.

Question 8

What is true about Paget's disease of the nipple?

Accepted Answer

There is always underlying carcinoma.

Answer

Eczema of the nipple is often bilateral.

Answer

Histology reveals giant cells.

Answer

It is highly malignant.

Question 9

What is the most common type of cancer found in the male breast?

Accepted Answer

Infiltrating ductal carcinoma

Answer

Lobular carcinoma in situ

Answer

Ductal carcinoma in situ

Answer

None of the above

Question 10

As per AJCC breast cancer staging, what does T4 signify?

Accepted Answer

Tumor of any size with direct extension to chest wall or skin (ulceration or nodules)

Answer

Distant metastasis

Answer

Spread to contralateral axillary lymph nodes

Answer

Sentinel lymph node involvement

Breast Surgery — MCQs

Breast Surgery — MCQs

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