Breast Surgery — MCQs

Breast Surgery Indian Medical PG Practice Questions and MCQs

Question 261: Which structures are preserved in Scanlon's modified radical mastectomy?

A. Lateral pectoral nerves (Correct Answer)
B. Level II nodes in the axilla
C. Pectoral fascia
D. Nipple and the areola

Explanation: In Modified Radical Mastectomy (MRM), the goal is to remove the entire breast tissue, the nipple-areola complex, and the axillary lymph nodes while preserving the pectoral muscles. **Explanation of the Correct Option:** **Scanlon’s modification** (also known as the Patey modification) involves the removal of both the breast and the **Pectoralis minor** muscle (or its reflection) to gain better access to Level III axillary lymph nodes. During this procedure, the **Lateral Pectoral Nerve** (which arises from the lateral cord and supplies the Pectoralis major) must be preserved to prevent atrophy of the Pectoralis major muscle. Preserving this nerve ensures the functional and aesthetic integrity of the chest wall. **Why other options are incorrect:** * **Level II nodes:** In any MRM (Scanlon, Patey, or Auchincloss), Level I and II axillary nodes are routinely removed for staging and treatment. * **Pectoral fascia:** This is the deep surgical margin. It is always removed along with the breast tissue to ensure oncological clearance. * **Nipple and Areola:** These are removed in a standard MRM. They are only preserved in "Nipple-Sparing Mastectomies," which are distinct from the Scanlon procedure. **High-Yield NEET-PG Pearls:** * **Auchincloss Modification:** Preserves both Pectoralis major and minor (most common MRM). * **Patey Modification:** Removes Pectoralis minor to clear Level III nodes. * **Long Thoracic Nerve (Nerve to Serratus Anterior):** Injury leads to "Winging of Scapula." * **Thoracodorsal Nerve (Nerve to Latissimus Dorsi):** Injury leads to weak adduction and internal rotation of the arm.

Question 262: A 65-year-old female, who underwent a right radical mastectomy 10 years ago, now presents with multiple subcutaneous nodules in her right upper limb. What is the most probable diagnosis?

A. Lymphangiosarcoma (Correct Answer)
B. Multiple lipomas
C. Varicosities
D. None of the above

Explanation: ### Explanation **Correct Answer: A. Lymphangiosarcoma** The clinical scenario describes **Stewart-Treves Syndrome**, a rare but classic complication of chronic lymphedema. **Why it is correct:** Lymphangiosarcoma is a malignant tumor of the lymphatic vessels. It typically occurs in patients who have undergone a **Radical Mastectomy** (which involves axillary lymph node dissection) followed by chronic, long-standing lymphedema of the ipsilateral arm. The latency period is usually long, typically **10 years or more** after the initial surgery. Clinically, it presents as multiple bluish-red subcutaneous nodules or plaques that may ulcerate. **Why incorrect options are wrong:** * **B. Multiple lipomas:** These are benign fatty tumors. While they are common subcutaneous nodules, they are not associated with post-mastectomy lymphedema or the specific timeline/location described. * **C. Varicosities:** These are dilated, tortuous veins. While lymphedema involves fluid stasis, it does not typically present as "multiple subcutaneous nodules" in the upper limb following cancer surgery. **NEET-PG High-Yield Pearls:** * **Stewart-Treves Syndrome:** Defined as lymphangiosarcoma arising in a limb with chronic lymphedema (most commonly post-mastectomy). * **Latency:** Usually develops **10–15 years** after surgery. * **Clinical Presentation:** Look for "bruise-like" patches or "purple-red nodules" on a swollen arm. * **Prognosis:** Extremely poor due to early hematogenous spread (often to the lungs). * **Treatment:** Aggressive surgical resection or limb amputation is often required, though palliative care is common due to late presentation.

Question 263: A 64-year-old male is to undergo an elective laparotomy. The proposed wound is considered "clean-contaminated." What wound characteristic does this indicate?

A. Entry of the genitourinary or respiratory tract without significant spillage (Correct Answer)
B. Gross spillage from the gastrointestinal tract
C. Entry into non-infected or uninfected tissue with no inflammation
D. Entry into pre-existing infected or contaminated tissue

Explanation: ### Explanation The classification of surgical wounds is a high-yield topic for NEET-PG, based on the **CDC Surgical Wound Classification**, which predicts the risk of postoperative surgical site infections (SSI). **1. Why Option A is Correct:** A **Clean-Contaminated (Class II)** wound occurs when a surgical procedure enters a hollow viscus (respiratory, alimentary, genital, or urinary tract) under **controlled conditions** and without unusual contamination. In this scenario, the laparotomy involves entering these tracts (e.g., an elective cholecystectomy or appendectomy without rupture), where the bacterial load is present but minimal spillage occurs. **2. Analysis of Incorrect Options:** * **Option B (Dirty/Infected - Class IV):** Gross spillage from the GI tract or entering an area with active clinical infection (like a perforated viscus or pus) classifies a wound as "Dirty." * **Option C (Clean - Class I):** These are uninfected operative wounds in which no inflammation is encountered and the respiratory, alimentary, genital, or uninfected urinary tracts are **not** entered. Examples include a hernia repair or mastectomy. * **Option D (Contaminated - Class III):** This involves fresh, accidental open wounds, major breaks in sterile technique, or gross spillage from the GI tract. There is inflammation but no frank pus. **3. Clinical Pearls for NEET-PG:** * **SSI Risk:** Clean (<2%), Clean-Contaminated (3–11%), Contaminated (10–17%), Dirty (>27%). * **Antibiotic Prophylaxis:** Usually indicated for Class II and III. For Class I, it is only indicated if a prosthetic implant is used (e.g., mesh in hernioplasty). * **Timing:** Prophylactic antibiotics should be administered within **60 minutes before** the skin incision.

Question 264: All of the following regarding cystosarcoma phyllodes are true EXCEPT:

A. The cut surface appears leaf-like.
B. Mastectomy is the preferred treatment for malignant tumors.
C. It arises from a single epithelial cell type. (Correct Answer)
D. Excision biopsy is used for diagnosis in benign tumors.

Explanation: **Explanation:** **Phyllodes Tumor (Cystosarcoma Phyllodes)** is a rare fibroepithelial breast tumor. The correct answer is **C** because Phyllodes tumors are **biphasic tumors**, meaning they arise from both **epithelial and stromal (mesenchymal)** components. In contrast to fibroadenomas, the stroma in Phyllodes is hypercellular and is the component that determines the malignant potential. **Analysis of Options:** * **Option A (True):** Grossly, the tumor exhibits a "leaf-like" appearance (Phyllon = leaf) due to the overgrowth of stroma projecting into the ductal spaces, creating clefts and slits on the cut surface. * **Option B (True):** For malignant Phyllodes, **Simple Mastectomy** is often the preferred treatment, especially if the tumor is large or if clear margins (at least 1 cm) cannot be achieved with breast-conserving surgery. * **Option D (True):** FNAC and Core Needle Biopsy often fail to differentiate Phyllodes from a cellular fibroadenoma. Therefore, **Excision Biopsy** (Wide Local Excision) is the gold standard for definitive diagnosis and treatment of benign variants. **High-Yield Clinical Pearls for NEET-PG:** * **Age Group:** Typically occurs in women aged 40–50 years (older than the typical fibroadenoma age). * **Metastasis:** Unlike breast cancer, malignant Phyllodes spreads via the **hematogenous route** (most commonly to the lungs). Axillary lymph node involvement is rare (<5%), so routine lymph node dissection is not required. * **Treatment Rule:** Wide Local Excision with a **1 cm margin** is the standard. If the tumor-to-breast ratio is high, mastectomy is performed. * **Grading:** Classified by the WHO into Benign, Borderline, and Malignant based on stromal cellularity, atypia, and mitotic count.

Question 265: Arrange the incidence of various types of breast cancers in increasing order.

A. PTEN (Cowden disease)
B. Sporadic breast cancer
C. Hereditary breast cancer
D. BRCA1 (Correct Answer)

Explanation: This question tests your understanding of the epidemiology and genetic distribution of breast cancer, a high-yield topic for NEET-PG. ### **Explanation of the Correct Order** The incidence of breast cancer types follows a specific hierarchy based on genetic risk versus population prevalence. To arrange them in **increasing order** of incidence: **BRCA1 < PTEN (Cowden) < Hereditary Breast Cancer < Sporadic Breast Cancer.** 1. **BRCA1 (Lowest Incidence):** While BRCA1 mutations carry a high lifetime risk (up to 70-80%), they are rare in the general population. BRCA1 mutations account for only about **2-3%** of all breast cancer cases. 2. **PTEN / Cowden Syndrome:** This is a rare autosomal dominant condition. While it significantly increases the risk of breast, thyroid, and endometrial cancers, its contribution to the total pool of breast cancer patients is extremely small (less than 1%). *Note: In the context of this specific MCQ, BRCA1 is often used as the representative "rare genetic marker" compared to broader categories.* 3. **Hereditary Breast Cancer:** This category includes all cases with a strong family history (including BRCA1, BRCA2, TP53, PTEN, etc.). It accounts for approximately **5-10%** of all breast cancers. 4. **Sporadic Breast Cancer (Highest Incidence):** The vast majority of breast cancers (**85-90%**) occur sporadically due to environmental factors, aging, and somatic mutations, without a defined germline genetic predisposition. ### **Why the Other Options are Incorrect** * **Sporadic Breast Cancer:** This is the **most common** type. It cannot be the answer for the "lowest" incidence in an increasing sequence. * **Hereditary Breast Cancer:** This is a broad umbrella term. It is more common than specific single-gene mutations like BRCA1 but less common than sporadic cases. * **PTEN:** While rarer than BRCA1 in some cohorts, in standard surgical teaching, BRCA mutations are the classic "low-incidence/high-risk" examples used to contrast with sporadic cases. ### **High-Yield Clinical Pearls for NEET-PG** * **Most common site of Breast Cancer:** Upper Outer Quadrant. * **Most common histological type:** Invasive Ductal Carcinoma (NOS). * **BRCA1 Association:** Often associated with **Triple Negative Breast Cancer (TNBC)** and Medullary Carcinoma. * **BRCA2 Association:** More commonly associated with **Male Breast Cancer**. * **Li-Fraumeni Syndrome:** Caused by **TP53** mutation; associated with early-onset breast cancer, sarcomas, and adrenocortical tumors.

Question 266: What is the treatment for hormone-dependent fungating carcinoma of the breast with lung secondaries in a 30-year-old female patient?

A. Simple mastectomy followed by oophorectomy (Correct Answer)
B. Radical mastectomy followed by oophorectomy
C. Adrenalectomy
D. Lumpectomy followed by castration

Explanation: ### Explanation This clinical scenario describes a **Stage IV (Metastatic) Breast Cancer** in a young, premenopausal female. The presence of lung secondaries (metastases) indicates that the goal of treatment is **palliative**, not curative. **1. Why Option A is Correct:** * **Simple Mastectomy:** In the presence of a "fungating" lesion (an ulcerating, infected, or bleeding tumor), a **Toilet Mastectomy** (a form of simple mastectomy) is performed. This is a palliative procedure intended to improve the patient's quality of life by removing the source of infection, odor, and hemorrhage. * **Oophorectomy:** Since the patient is 30 years old (premenopausal) and the tumor is **hormone-dependent**, the primary systemic treatment involves reducing estrogen. Bilateral oophorectomy (surgical castration) is a classic method to eliminate the primary source of estrogen in premenopausal women, thereby controlling the systemic spread (lung secondaries). **2. Why the Other Options are Incorrect:** * **Option B (Radical Mastectomy):** Radical or Modified Radical Mastectomy (MRM) is indicated for localized or locally advanced breast cancer with curative intent. In Stage IV disease, aggressive axillary clearance offers no survival benefit and increases morbidity. * **Option C (Adrenalectomy):** This was historically used for hormonal ablation but has been completely replaced by medical management (Aromatase inhibitors) or oophorectomy due to high surgical morbidity. * **Option D (Lumpectomy):** Lumpectomy is part of Breast Conservation Surgery (BCS). It is contraindicated in fungating carcinomas where the skin is extensively involved and the goal is palliative hygiene. **3. Clinical Pearls for NEET-PG:** * **Toilet Mastectomy:** Always remember that for a fungating, foul-smelling breast mass in the setting of distant metastasis, the surgical procedure is a palliative "Toilet Mastectomy." * **Hormonal Status:** In premenopausal women, the ovaries are the main estrogen source; in postmenopausal women, peripheral conversion in fat (via aromatase) is the source. * **Triple Negative Breast Cancer (TNBC):** If the question specified the tumor was hormone-receptor negative, chemotherapy would be the systemic treatment of choice instead of oophorectomy.

Question 267: What sign is typically seen in large duct papilloma?

A. Nipple discharge (Correct Answer)
B. Breast mass
C. Skin excoriation
D. Lymph node involvement

Explanation: **Explanation:** **Intraductal Papilloma** is the most common cause of spontaneous, bloody nipple discharge in women. It is a benign proliferative lesion occurring within the lactiferous ducts. 1. **Why Nipple Discharge is Correct:** Large duct papillomas (solitary) typically arise in the **subareolar region** within the major lactiferous ducts. Because these lesions are fragile and highly vascular, they bleed easily into the ductal system. This manifests clinically as a **spontaneous, serosanguinous, or bloody discharge** from a single duct orifice. 2. **Why Other Options are Incorrect:** * **Breast Mass:** While a large papilloma can occasionally be felt as a small subareolar lump, it is usually too small (often <0.5 cm) to be palpable. A mass is more characteristic of fibroadenomas or carcinomas. * **Skin Excoriation:** This is typically seen in Paget’s disease of the breast or severe eczema, not in intraductal lesions. * **Lymph Node Involvement:** This is a hallmark of malignant processes (metastasis). Intraductal papilloma is a benign condition and does not spread to lymph nodes. **High-Yield NEET-PG Pearls:** * **Investigation of Choice:** Microdochectomy (excision of the involved duct) is both diagnostic and therapeutic. * **Triple Assessment:** Always perform imaging (Mammography/Ultrasound) to rule out underlying malignancy, though papillomas are often invisible on standard mammograms. * **Galactography:** Historically used to show a "filling defect," but now largely replaced by ductoscopy or high-resolution USG. * **Solitary vs. Multiple:** Solitary papillomas (large duct) carry a minimal risk of malignancy, whereas **multiple papillomas** (small duct/peripheral) are associated with a higher risk of developing breast cancer.

Question 268: What is the most important prognostic factor in breast cancer?

A. Lymph node status (Correct Answer)
B. Tumor size
C. Progesterone receptor status
D. Stage

Explanation: **Explanation:** In breast cancer, the **axillary lymph node status** is the single most important independent prognostic factor. The presence and number of involved nodes directly correlate with the risk of distant metastasis and overall survival. While tumor biology (like grade or receptors) dictates the type of treatment, the extent of nodal involvement remains the most reliable predictor of the patient's long-term outcome. **Analysis of Options:** * **A. Lymph node status (Correct):** It is the most significant prognostic indicator. A patient with zero positive nodes has a significantly higher 10-year survival rate compared to one with four or more involved nodes. * **B. Tumor size:** This is the second most important prognostic factor. While larger tumors generally have a worse prognosis, a small tumor with positive nodes carries a poorer prognosis than a larger tumor with negative nodes. * **C. Progesterone receptor (PR) status:** This is a **predictive factor** (indicating response to hormonal therapy) rather than the primary prognostic factor. While Triple Negative Breast Cancer (TNBC) has a worse prognosis, nodal status still overrides receptor status in staging and survival prediction. * **D. Stage:** While the TNM stage as a whole is used to determine prognosis, the question asks for the *individual* factor. Within the TNM system, the 'N' (node) component carries the most weight for survival. **Clinical Pearls for NEET-PG:** * **Most important prognostic factor:** Axillary lymph node status. * **Most important factor for recurrence:** Number of axillary lymph nodes involved. * **Sentinel Lymph Node Biopsy (SLNB):** The gold standard for axillary staging in clinically node-negative (cN0) patients. * **Triple Negative Breast Cancer:** Associated with the worst prognosis among molecular subtypes.

Question 269: A patient presents with a 1.2 cm breast lump and three palpable lymph nodes in the ipsilateral axilla. The lymph nodes are fixed, and there is no evidence of distant metastasis. According to the AJCC staging system, what is the stage of this patient's disease?

A. T1N0M0
B. T1N1M0
C. T1N2aM0 (Correct Answer)
D. T2N1M0

Explanation: ### Explanation The staging of breast cancer follows the **AJCC TNM system**. To determine the correct stage, we must evaluate the Tumor (T), Node (N), and Metastasis (M) components based on the clinical findings provided. **1. Why T1N2aM0 is correct:** * **T (Tumor):** The lump is **1.2 cm**. T1 is defined as a tumor ≤ 2 cm in greatest dimension. Specifically, this is T1c (>1 cm to ≤2 cm). * **N (Node):** The patient has palpable, **fixed** ipsilateral axillary lymph nodes. According to AJCC, **N2a** is defined as metastases in ipsilateral unresectable **fixed** or matted axillary lymph nodes. * **M (Metastasis):** There is no evidence of distant metastasis, categorized as **M0**. Combining these gives **T1N2aM0**. **2. Why other options are incorrect:** * **A (T1N0M0):** Incorrect because N0 implies no regional lymph node metastasis, but this patient has palpable, fixed nodes. * **B (T1N1M0):** Incorrect because N1 refers to **mobile** (not fixed) level I/II axillary lymph nodes. The presence of "fixed" nodes upgrades the stage to N2a. * **D (T2N1M0):** Incorrect because T2 requires a tumor size > 2 cm but ≤ 5 cm (this lump is only 1.2 cm). Additionally, N1 does not account for the "fixed" nature of the nodes. **Clinical Pearls for NEET-PG:** * **N1:** Mobile ipsilateral axillary nodes. * **N2a:** Fixed or matted ipsilateral axillary nodes. * **N3a:** Metastasis in ipsilateral infraclavicular lymph nodes. * **N3b:** Metastasis in ipsilateral internal mammary and axillary nodes. * **N3c:** Metastasis in ipsilateral supraclavicular lymph nodes. * **High-Yield:** Any "fixed" node automatically moves the staging to at least N2, regardless of the number of nodes.

Question 270: A 25-year-old female presents with a rubbery, movable nodule in her left breast during the menstrual cycle. What is the most likely diagnosis?

A. Phyllodes tumor
B. Fibroadenoma (Correct Answer)
C. Intraductal papilloma
D. Carcinoma of the breast

Explanation: ### Explanation **Correct Answer: B. Fibroadenoma** **Why it is correct:** Fibroadenoma is the most common benign breast tumor in young women (typically aged 15–30). The clinical description of a **"rubbery, movable nodule"** is the classic presentation. These tumors are often referred to as the **"Breast Mouse"** because they are highly mobile and slip away under the examining fingers. They are estrogen-sensitive, which explains why they may become more prominent or symptomatic during the menstrual cycle or pregnancy. **Why the other options are incorrect:** * **Phyllodes Tumor:** While also mobile, these typically occur in an older age group (40–50s) and are characterized by rapid growth and a much larger size. Histologically, they show a "leaf-like" pattern and increased stromal cellularity. * **Intraductal Papilloma:** This is the most common cause of **bloody nipple discharge**. It is usually a small, subareolar lesion that is often not palpable as a distinct "rubbery" mass. * **Carcinoma of the Breast:** Malignant lesions are typically hard, painless, fixed to the skin or underlying muscle (not movable), and have irregular margins. They are less common in a 25-year-old compared to fibroadenomas. **NEET-PG High-Yield Pearls:** * **Investigation of Choice:** In a woman <30 years, the initial investigation is **Ultrasound (USG)**. Mammography is avoided due to dense breast tissue. * **Triple Assessment:** Includes Clinical Examination, Imaging (USG/Mammography), and Pathology (FNAC/Core Needle Biopsy). * **Histology:** Fibroadenomas show two patterns: **Intracanalicular** (stroma compresses ducts into slits) and **Pericanalicular** (ducts remain patent). * **Management:** Conservative management is preferred if the diagnosis is certain; surgical excision is indicated if the mass is >3 cm, rapidly enlarging, or if the patient is anxious.

Practice by Chapter

Breast Anatomy and Physiology

Practice Questions

Benign Breast Diseases

Practice Questions

Breast Cancer Screening

Practice Questions

Breast Cancer: Diagnosis and Staging

Practice Questions

Surgical Management of Breast Cancer

Practice Questions

Oncoplastic Breast Surgery

Practice Questions

Sentinel Lymph Node Biopsy

Practice Questions

Axillary Surgery

Practice Questions

Breast Reconstruction Techniques

Practice Questions

Male Breast Disorders

Practice Questions

Phyllodes Tumors

Practice Questions

Management of Ductal Carcinoma In Situ

Practice Questions

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