Breast Surgery — MCQs

Breast Surgery Indian Medical PG Practice Questions and MCQs

Question 191: Best prognosis amongst the following histological variants of breast carcinoma is seen with:

A. Intraductal
B. Colloid (Mucinous) (Correct Answer)
C. Lobular
D. Medullary

Explanation: **Explanation:** The prognosis of breast carcinoma is primarily determined by its histological subtype, grade, and molecular markers. Among the invasive ductal carcinomas, certain "special types" exhibit a significantly more favorable clinical course than the standard Invasive Carcinoma of No Special Type (NST). **Why Colloid (Mucinous) is Correct:** Colloid carcinoma is characterized by large pools of extracellular mucin surrounding small islands of well-differentiated tumor cells. It typically occurs in older women, is often Estrogen Receptor (ER) positive, and has a very low incidence of axillary lymph node metastasis. Because of its slow growth and favorable biological profile, it carries one of the best prognoses among invasive breast cancers, with 10-year survival rates exceeding 90%. **Analysis of Incorrect Options:** * **Intraductal (DCIS):** While this is a "pre-invasive" stage (Stage 0) and technically has an excellent prognosis, it is considered a precursor rather than an invasive histological variant. In the context of invasive variants, Colloid is the classic answer for "best prognosis." * **Lobular (ILC):** Invasive Lobular Carcinoma generally has a prognosis similar to or slightly worse than standard ductal carcinoma. It is notorious for being multifocal, bilateral, and having an unusual metastatic pattern (serosal surfaces, ovaries). * **Medullary:** While Medullary carcinoma has a better prognosis than standard ductal carcinoma (despite its high-grade appearance), it is generally considered slightly less favorable than pure Colloid or Tubular variants. **NEET-PG High-Yield Pearls:** * **Best Prognosis overall:** Tubular Carcinoma (often cited as >95% 10-year survival). * **Order of Favorable Prognosis:** Tubular > Colloid (Mucinous) > Papillary > Medullary. * **Worst Prognosis:** Inflammatory Breast Cancer (T4d). * **Molecular Marker:** Colloid carcinoma is usually **ER/PR positive** and **HER2 negative** (Luminal A type).

Question 192: What is the most sensitive and specific investigation for carcinoma breast?

A. CT scan
B. Thermography
C. USG
D. Mammography (Correct Answer)

Explanation: **Explanation:** **Mammography** is the gold standard and the most sensitive and specific investigation for the detection of breast carcinoma, especially in women over the age of 35. Its primary strength lies in its ability to detect **microcalcifications** and soft tissue masses before they become clinically palpable. For screening purposes, it has a sensitivity of approximately 85–90%. **Analysis of Options:** * **CT Scan:** While useful for staging (detecting distant metastasis to lungs or liver), it is not used for primary breast imaging due to poor resolution of breast parenchyma and high radiation exposure. * **Thermography:** This measures infrared heat patterns. It has a very high false-positive rate and lacks the specificity required for diagnosis; it is currently not recommended in standard clinical practice. * **USG (Ultrasonography):** This is the investigation of choice for women **under 35 years** (due to dense breast tissue) and for differentiating cystic from solid lesions. However, it is less sensitive than mammography for detecting early microcalcifications. **Clinical Pearls for NEET-PG:** * **Triple Assessment:** The definitive protocol for diagnosing a breast lump includes: 1. Clinical Examination, 2. Imaging (Mammography/USG), and 3. Pathology (FNAC/Core Needle Biopsy). * **BI-RADS Score:** Mammography results are reported using the Breast Imaging-Reporting and Data System (0-6 scale). * **MRI Breast:** Though more sensitive than mammography, it is less specific. It is the investigation of choice for screening high-risk patients (BRCA mutations), evaluating breast implants, or detecting occult primary tumors. * **Best Diagnostic Investigation:** While mammography is the best *imaging*, the "Gold Standard" for definitive diagnosis remains **Core Needle Biopsy**.

Question 193: On which of the following does prognosis in male breast cancer depend?

A. Duration of disease
B. Nipple discharge
C. Ulceration of nipple
D. Lymph node status (Correct Answer)

Explanation: ### Explanation The prognosis of male breast cancer (MBC) is primarily determined by the **axillary lymph node status**, which is the most significant independent prognostic factor for both overall survival and disease-free survival. This mirrors female breast cancer, where the presence and number of involved nodes dictate the stage and long-term outcome. **Why Lymph Node Status is Correct:** In MBC, the tumor is often located centrally due to the lack of extensive lobular tissue. Because the male breast is small, cancer quickly reaches the lymphatics. The presence of nodal metastasis indicates a higher likelihood of systemic spread, directly correlating with a poorer prognosis. **Analysis of Incorrect Options:** * **Duration of disease (A):** While a delay in diagnosis is common in men (often leading to presentation at a higher stage), the duration itself is a subjective variable and not a standardized prognostic indicator compared to pathological staging. * **Nipple discharge (B):** This is a clinical symptom. While bloody nipple discharge in a male is highly suspicious for malignancy (papillary carcinoma), it does not independently determine the survival outcome. * **Ulceration of nipple (C):** Ulceration indicates local advancement (T4b stage). While it signifies a more advanced local stage, the ultimate prognosis is still more heavily influenced by whether the disease has spread to the regional lymph nodes. **Clinical Pearls for NEET-PG:** * **Most common type:** Invasive Ductal Carcinoma (IDC) is the most common histological subtype. Lobular carcinoma is rare because males lack terminal lobules. * **Risk Factors:** BRCA2 mutation (stronger association than BRCA1), Klinefelter syndrome (highest risk), and hyperestrogenism (cirrhosis, obesity). * **Presentation:** Usually presents as a painless, firm subareolar mass. * **Receptor Status:** Men are more likely to be **ER/PR positive** than women. * **Treatment:** Modified Radical Mastectomy (MRM) is the standard surgical approach. Tamoxifen is the preferred adjuvant hormonal therapy.

Question 194: Which of the following is the most important prognostic factor in breast cancer?

A. Histological grade of the tumor
B. Stage of the tumor at the time of diagnosis (Correct Answer)
C. Status of estrogen and progesterone receptors
D. Overexpression of p-53 tumor suppressor gene

Explanation: **Explanation:** In breast cancer, the **Stage of the tumor** (determined by the TNM classification) is the most important overall prognostic factor. Staging incorporates the size of the primary tumor (T), the presence and extent of regional lymph node involvement (N), and distant metastasis (M). Among these, **axillary lymph node status** is specifically recognized as the single most important *individual* prognostic factor within the staging system. Patients with node-negative disease have a significantly higher 10-year survival rate compared to those with nodal involvement. **Analysis of Incorrect Options:** * **A. Histological grade:** While the Bloom-Richardson grade (assessing tubule formation, nuclear pleomorphism, and mitotic count) provides insight into the tumor's aggressiveness, it is secondary to the anatomical extent (stage) of the disease. * **C. Receptor status (ER/PR):** These are primarily **predictive factors** used to determine the likelihood of response to hormonal therapy (e.g., Tamoxifen). While Triple Negative Breast Cancer (TNBC) has a poorer prognosis, receptor status alone does not outweigh the stage. * **D. p-53 Overexpression:** This is a molecular marker associated with poor differentiation and a more aggressive clinical course, but it remains a minor prognostic indicator compared to clinical staging. **NEET-PG High-Yield Pearls:** * **Most important prognostic factor:** Stage of the tumor. * **Most important individual prognostic factor:** Axillary lymph node status. * **Most common site of distant metastasis:** Bone (specifically the lumbar spine via Batson’s plexus). * **Most important factor for recurrence:** Number of positive axillary nodes. * **HER2/neu:** A predictive marker for response to Trastuzumab (Herceptin).

Question 195: Male breast carcinoma is usually associated with which of the following genetic mutations?

A. BRCA1
B. BRCA2 (Correct Answer)
C. STK1
D. STK2

Explanation: **Explanation:** Male breast carcinoma is a rare malignancy, accounting for less than 1% of all breast cancer cases. The most significant genetic risk factor identified for male breast cancer is a germline mutation in the **BRCA2** gene. 1. **Why BRCA2 is Correct:** While BRCA1 and BRCA2 are both tumor suppressor genes involved in DNA repair, their association with male breast cancer differs significantly. Men with a **BRCA2 mutation** have a cumulative lifetime risk of developing breast cancer of approximately **6–8%** (nearly an 80-fold increase compared to the general population). In contrast, BRCA1 mutations carry a much lower lifetime risk (around 1%) for males. 2. **Why Other Options are Incorrect:** * **BRCA1:** Primarily associated with early-onset female breast cancer and epithelial ovarian cancer. Its association with male breast cancer is weak. * **STK11 (often mislabeled as STK1):** Mutations in the *STK11* gene cause **Peutz-Jeghers Syndrome**. While this syndrome increases the risk of various cancers (including female breast cancer), it is not the primary genetic driver for male breast carcinoma. * **STK2:** This is not a recognized high-yield genetic marker associated with breast cancer syndromes in standard surgical pathology. **High-Yield Clinical Pearls for NEET-PG:** * **Most common histological type:** Invasive Ductal Carcinoma (IDC) is the most common. Lobular carcinoma is extremely rare in men due to the lack of acini. * **Receptor Status:** Male breast cancers are more likely to be **Estrogen Receptor (ER) positive** than female breast cancers. * **Risk Factors:** Klinefelter syndrome (47, XXY) is the strongest non-genetic risk factor (associated with a 20-50 fold increase in risk). * **Presentation:** Usually presents as a painless subareolar mass, often at a later stage due to lack of screening and awareness.

Question 196: In Radical mastectomy, which of the following is spared?

A. Pectorialis major
B. Pectoralis minor
C. Axillary lymph nodes
D. Supraclavicular lymph nodes (Correct Answer)

Explanation: In breast surgery, understanding the anatomical extent of different types of mastectomies is high-yield for NEET-PG. ### **Explanation of the Correct Answer** The question refers to the **Halsted Radical Mastectomy (RM)**. By definition, this procedure involves the en-bloc removal of the entire breast tissue, the overlying skin, the **pectoralis major**, the **pectoralis minor**, and the **axillary lymph nodes** (Levels I, II, and III). **Supraclavicular lymph nodes (Option D)** are considered Level IV nodes. In the staging of breast cancer (AJM/TNM), involvement of supraclavicular nodes is classified as **N3c (Stage IIIC)** and is traditionally viewed as regional spread that is beyond the scope of standard radical surgery. These nodes are **not** part of a Radical Mastectomy. ### **Analysis of Incorrect Options** * **A. Pectoralis major:** This is the hallmark of the Halsted Radical Mastectomy. It is removed to ensure a deep clear margin and to facilitate access to the apex of the axilla. * **B. Pectoralis minor:** This is also removed in a Radical Mastectomy to allow complete clearance of the Level II and III axillary lymph nodes. (Note: In a *Modified* Radical Mastectomy, this muscle is either retracted or divided, but not necessarily removed). * **C. Axillary lymph nodes:** Complete axillary dissection (Levels I-III) is a mandatory component of any radical surgical approach for breast cancer. ### **High-Yield Clinical Pearls for NEET-PG** * **Halsted Radical Mastectomy:** Removes Breast + Both Pectorals + Axillary nodes. * **Patey’s Modified Radical Mastectomy (MRM):** Removes Breast + **Pectoralis minor** + Axillary nodes (Pectoralis major is **spared**). * **Auchincloss MRM:** Removes Breast + Axillary nodes (Both Pectoralis major and minor are **spared**). * **Nerves at risk during surgery:** Long thoracic nerve (Serratus anterior - Winging of scapula) and Thoracodorsal nerve (Latissimus dorsi).

Question 197: A female patient presents with a hard, mobile lump in her right breast. Which investigation would be most helpful in making the diagnosis?

A. Fine Needle Aspiration Cytology (FNAC)
B. Needle biopsy
C. Excision biopsy (Correct Answer)
D. Mammography

Explanation: ### Explanation The correct answer is **Excision biopsy**. **1. Why Excision Biopsy is the Correct Choice:** In clinical practice, a "hard, mobile lump" in a young female is often a **Fibroadenoma** (the most common benign breast tumor). While the "Triple Assessment" (Clinical exam, Imaging, and Pathology) is the standard protocol, the question asks for the investigation that is **most helpful in making the diagnosis**. Excision biopsy is considered the **gold standard** because it provides the entire specimen for histopathological examination (HPE). It allows for the assessment of the tissue architecture, which is essential to definitively differentiate between a benign fibroadenoma, a phyllodes tumor, or a malignancy. In cases where a lump is clinically suspicious or causing anxiety, excision serves both a diagnostic and therapeutic purpose. **2. Why Other Options are Incorrect:** * **FNAC (A):** Provides only cytological details (individual cells). It cannot distinguish between certain conditions like a cellular fibroadenoma and a low-grade phyllodes tumor because it lacks architectural context. * **Needle Biopsy (B):** (Core Needle Biopsy) is better than FNAC as it provides tissue architecture, but in the context of a mobile, discrete lump where a definitive diagnosis is required, excision is the definitive "final" step. * **Mammography (D):** This is a screening and diagnostic imaging tool. While it helps characterize the lesion (e.g., popcorn calcifications in old fibroadenomas), it is not a confirmatory pathological diagnosis. Furthermore, in young women, dense breast tissue often makes mammography less sensitive. **3. Clinical Pearls for NEET-PG:** * **Fibroadenoma** is known as the **"Breast Mouse"** due to its high mobility. * **Triple Assessment:** The combination of clinical examination, imaging (USG <35 years, Mammography >35 years), and pathology (FNAC/Core Biopsy) has an accuracy of >99%. * If a lump is >4cm or rapidly increasing in size, always suspect a **Phyllodes tumor**. * **Investigation of choice** for a breast lump in a woman <30 years is **Ultrasound**, whereas for >35 years, it is **Mammography**.

Question 198: Radiotherapy after mastectomy would not be required in which of the following case scenarios of breast cancer?

A. Large tumor
B. Metastasis (Correct Answer)
C. Axillary nodal involvement
D. Positive margins

Explanation: ### Explanation The primary goal of **Post-Mastectomy Radiotherapy (PMRT)** is **locoregional control**. It is indicated when there is a high risk of local recurrence at the chest wall or regional lymph nodes. **Why "Metastasis" is the correct answer:** In the presence of **distant metastasis (Stage IV disease)**, the treatment intent shifts from curative to **palliative**. While radiotherapy may be used palliatively to treat painful bone metastases or brain lesions, it is not a standard "post-mastectomy" requirement for local control. The management of metastatic disease is primarily systemic (chemotherapy, hormonal therapy, or targeted therapy). **Analysis of Incorrect Options:** * **Large Tumor (Option A):** Tumors >5 cm (T3) or those involving the skin/chest wall (T4) have a high risk of local recurrence, necessitating PMRT. * **Axillary Nodal Involvement (Option B):** Presence of 4 or more positive nodes is a definitive indication for PMRT. Many centers also consider it for 1–3 positive nodes depending on other risk factors. * **Positive Margins (Option D):** If surgical margins are involved by the tumor and cannot be re-excised, radiotherapy is mandatory to sterilize the remaining microscopic disease. **NEET-PG High-Yield Pearls:** * **Standard Indications for PMRT:** 1. Tumor size **>5 cm (T3)**. 2. **4 or more** positive axillary lymph nodes (N2). 3. **Positive or close (<2mm) resection margins**. 4. Skin or chest wall involvement (**T4**). * **Goal:** PMRT reduces the risk of local recurrence by approximately two-thirds and provides a modest improvement in overall survival in high-risk patients. * **Sequence:** Usually administered *after* adjuvant chemotherapy but *before* or *during* hormonal therapy.

Question 199: A 45-year-old patient presents with greenish discharge from the breast and a tender mass below the areolar tissue. Which of the following is true about this condition?

A. Associated with smoking (Correct Answer)
B. Associated with alcohol intake
C. Always unilateral
D. Single duct is involved

Explanation: **Explanation:** The clinical presentation of **greenish nipple discharge** and a **tender subareolar mass** in a 45-year-old patient is characteristic of **Mammary Duct Ectasia** (also known as Periductal Mastitis). **1. Why Option A is Correct:** Smoking is the most significant risk factor for periductal mastitis. Components in cigarette smoke (like cotinine) cause direct damage to the subareolar duct epithelium and lead to anaerobic infections. This results in periductal inflammation, ductal dilatation (ectasia), and the accumulation of thick, stagnant secretions that appear green or "cheesy." **2. Why the other options are Incorrect:** * **Option B:** There is no established clinical association between alcohol intake and the pathogenesis of duct ectasia. * **Option C:** While it can present unilaterally, duct ectasia is frequently **bilateral**. It is a degenerative process of the lactiferous ducts that often affects both breasts simultaneously. * **Option D:** Unlike an Intraductal Papilloma (which typically involves a single duct and causes bloody discharge), duct ectasia usually involves **multiple ducts**. **Clinical Pearls for NEET-PG:** * **Discharge Characteristics:** The discharge is typically thick, multi-colored (green, brown, or creamy), and originates from multiple ducts. * **Physical Exam:** May reveal a "slit-like" nipple retraction (due to fibrosis) and a doughy subareolar mass. * **Complications:** Can lead to **Zuska’s Disease** (recurrent subareolar abscesses) or a mammary fistula. * **Management:** Smoking cessation is crucial. Surgical management involves **Hadfield’s operation** (Total Subareolar Duct Excision). * **Differential:** Must be differentiated from malignancy; however, the presence of greenish discharge and tenderness strongly points toward ectasia.

Question 200: A 45-year-old woman presents with a hard and mobile lump in the breast. What is the next investigation?

A. Fine Needle Aspiration Cytology (FNAC) (Correct Answer)
B. Ultrasonography (USG)
C. Mammography
D. Excision biopsy

Explanation: **Explanation:** The management of any breast lump follows the **Triple Assessment** protocol, which consists of clinical examination, imaging, and pathological diagnosis. This approach has a diagnostic accuracy of over 99%. **Why FNAC is the correct answer:** In the context of a palpable, hard, and mobile lump in a 45-year-old woman, the next step is to obtain a tissue/cytological diagnosis. While core needle biopsy (CNB) is increasingly preferred for definitive diagnosis, **FNAC** remains a standard, rapid, and cost-effective first-line investigation in many clinical settings to confirm the nature of the lump (benign vs. malignant). In the hierarchy of "next investigation" for a palpable lump in many traditional surgical teaching modules and exams, FNAC is prioritized to establish pathology. **Why other options are incorrect:** * **Ultrasonography (USG):** This is the imaging modality of choice for women **under 35 years** (due to dense breast tissue) or to differentiate cystic from solid lesions. * **Mammography:** This is the primary imaging tool for women **over 35 years**. While it helps characterize the lesion and screen the contralateral breast, it does not provide a pathological diagnosis. * **Excision Biopsy:** This is a surgical procedure and is no longer the "next" step. It is only indicated if triple assessment is inconclusive or if the lump is small and requires removal for both diagnosis and treatment. **Clinical Pearls for NEET-PG:** * **Triple Assessment:** Clinical Exam + Imaging (USG/Mammography) + Pathology (FNAC/Core Biopsy). * **Age Cut-off:** Use USG for <35 years; Mammography for >35 years. * **Gold Standard for Diagnosis:** Core Needle Biopsy (CNB) is superior to FNAC as it preserves architecture and allows for IHC (ER/PR/HER2) testing. * **Hard & Mobile Lump:** Often suggests a benign lesion like a fibroadenoma (though usually in younger women) or a well-circumscribed malignancy. Always rule out malignancy in patients >40 years.

Practice by Chapter

Breast Anatomy and Physiology

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Benign Breast Diseases

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Breast Cancer Screening

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Breast Cancer: Diagnosis and Staging

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Surgical Management of Breast Cancer

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Oncoplastic Breast Surgery

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Sentinel Lymph Node Biopsy

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Axillary Surgery

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Breast Reconstruction Techniques

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Male Breast Disorders

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Phyllodes Tumors

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Management of Ductal Carcinoma In Situ

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