Breast Surgery — MCQs

Breast Surgery Indian Medical PG Practice Questions and MCQs

Question 71: What type of radiation is used in mammography?

A. Conventional X-ray
B. Bremsstrahlung X-ray (Correct Answer)
C. Low amperage X-ray
D. Stereo Ray

Explanation: ### Explanation **Correct Option: B. Bremsstrahlung X-ray** Mammography utilizes low-energy X-rays to achieve high-contrast images of soft breast tissue. These X-rays are primarily produced via **Bremsstrahlung (braking) radiation**. This occurs when high-speed electrons from the cathode are decelerated by the electric field of the target nucleus (usually Molybdenum or Rhodium), releasing energy in the form of photons. In mammography, the goal is to produce a "monochromatic" or narrow-spectrum beam (typically 15–30 keV) to differentiate between water, fat, and calcium densities. **Analysis of Incorrect Options:** * **A. Conventional X-ray:** While mammography is a form of X-ray, "conventional" usually refers to high-voltage (kVp) imaging used for bones/chest. Mammography requires **low kVp** and specific target/filter combinations (Mo/Mo or Mo/Rh) to enhance soft tissue contrast, which distinguishes it from general radiography. * **C. Low amperage X-ray:** Amperage (mA) controls the *quantity* (intensity) of X-rays, not the type of radiation. While mammography uses specific settings, "low amperage" is not the defining physical principle of the radiation produced. * **D. Stereo Ray:** This is a distractor term. Stereotactic imaging is a *technique* used for breast biopsies, but it is not a type of radiation. **High-Yield Clinical Pearls for NEET-PG:** * **Target Materials:** Molybdenum (Mo) is the most common target; Rhodium (Rh) is used for denser/thicker breasts. * **Window:** Mammography tubes use a **Beryllium window** instead of glass to prevent the absorption of low-energy X-rays. * **Best Time for Mammography:** Day 7 to 10 of the menstrual cycle (when breast tenderness and engorgement are minimal). * **Screening:** The standard views are **Craniocaudal (CC)** and **Mediolateral Oblique (MLO)**. The MLO view is best for visualizing the Upper Outer Quadrant and the Axillary Tail of Spence.

Question 72: Peau d'orange develops due to which of the following?

A. Vascular obstruction
B. Lymphatic obstruction (Correct Answer)
C. Local spread
D. Endocrinal abnormality

Explanation: **Explanation:** **Peau d'orange** (French for "orange peel skin") is a classic clinical sign of inflammatory breast cancer or advanced malignancy. **Why Lymphatic Obstruction is Correct:** The characteristic appearance occurs due to **cutaneous lymphatic obstruction** by tumor emboli. When the deep lymphatics are blocked, it leads to localized lymphedema of the skin. The skin becomes thickened and edematous; however, the hair follicles and sweat glands remain tethered to the underlying subcutaneous fenestrations (Cooper’s ligaments). This creates a pitted, dimpled appearance resembling the skin of an orange. **Analysis of Incorrect Options:** * **Vascular obstruction:** While venous congestion can cause edema, it does not produce the specific "pitted" tethering seen in peau d'orange. * **Local spread:** While the tumor is spreading locally, the specific skin change is a secondary mechanical effect of lymphatic blockage, not the direct invasion of the skin surface itself. * **Endocrinal abnormality:** Hormonal changes (like estrogen excess) can cause breast tenderness or gynecomastia but do not lead to structural skin changes like peau d'orange. **High-Yield Clinical Pearls for NEET-PG:** * **TNM Staging:** The presence of peau d'orange automatically categorizes a breast cancer as **T4b**. * **Differential Diagnosis:** While most commonly associated with breast carcinoma, it can also be seen in severe mastitis or cellulitis. * **Cooper’s Ligaments:** Remember that **skin dimpling** is due to the involvement of Cooper’s ligaments, whereas **peau d'orange** is specifically due to lymphatic edema. * **Biopsy:** If inflammatory breast cancer is suspected, a punch biopsy of the skin may show tumor emboli within the dermal lymphatics.

Question 73: Which of the following genetic predispositions is associated with the least risk of breast cancer?

A. BRCA1 mutation
B. BRCA2 mutation
C. Li-Fraumeni syndrome
D. Ataxia telangiectasia (Correct Answer)

Explanation: ### 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.

Question 74: Which of the following are NOT associated with breast cancer?

A. BRCA 1 & BRCA 2, Apocrine metaplasia, Moderate hyperplasia
B. Fibroadenoma, Moderate hyperplasia (Correct Answer)
C. Atypical ductal hyperplasia, Moderate hyperplasia, Fibroadenoma
D. BRCA 1 & BRCA 2, Atypical ductal hyperplasia, Moderate hyperplasia

Explanation: 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).

Question 75: In which one of the following types of carcinoma of the breast is a biopsy of the opposite breast advised?

A. Inflammatory carcinoma
B. Medullary carcinoma
C. Lobular carcinoma (Correct Answer)
D. Scirrhous carcinoma

Explanation: **Explanation:** The correct answer is **Lobular Carcinoma (Invasive Lobular Carcinoma - ILC)**. **1. Why Lobular Carcinoma is correct:** Invasive Lobular Carcinoma is uniquely characterized by its high rate of **multicentricity** (multiple foci within the same breast) and **bilaterality** (occurrence in the opposite breast). Approximately 10–15% of patients with ILC will have synchronous or metachronous cancer in the contralateral breast. This is attributed to the loss of **E-cadherin** expression, which leads to a diffuse growth pattern rather than a discrete mass. Because these lesions are often clinically and mammographically occult, a low threshold for biopsy or surveillance of the opposite breast is traditionally advised. **2. Why the other options are incorrect:** * **Inflammatory Carcinoma:** This is a clinical diagnosis characterized by dermal lymphatic invasion. It is highly aggressive and spreads rapidly, but it does not have the specific biological predisposition for bilateral primary tumors seen in ILC. * **Medullary Carcinoma:** This subtype is often associated with BRCA1 mutations. While BRCA mutations increase the risk of bilateral breast cancer, the specific pathological subtype itself does not mandate a contralateral biopsy as a standard of care compared to ILC. * **Scirrhous Carcinoma:** This is an older term for Invasive Carcinoma of No Special Type (NST) with significant fibrosis. It is the most common form of breast cancer and typically presents as a unilateral, focal mass. **High-Yield Clinical Pearls for NEET-PG:** * **E-cadherin loss:** The hallmark molecular feature of Lobular Carcinoma (helps differentiate it from Ductal Carcinoma). * **Indian File Pattern:** The classic histopathological arrangement of cells in ILC. * **Mirror Image Biopsy:** Historically, ILC was the classic indication for a "mirror image biopsy" of the contralateral breast, though modern practice often utilizes **Breast MRI** for screening the opposite breast due to its high sensitivity for ILC. * **Metastatic Pattern:** Unlike ductal carcinoma, ILC tends to metastasize to unusual sites like the peritoneum, GI tract, and ovaries.

Question 76: Which quadrant of the breast is the least common site for cancer?

A. Superior Outer
B. Inferior Outer
C. Subareolar
D. Lower Inner Quadrant (Correct Answer)

Explanation: **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 77: A 26-year-old breastfeeding woman presents with redness, pain around the nipple, and purulent discharge. Staphylococcus aureus was cultured from the discharge. Which of the following statements is true about the patient's condition?

A. This condition mostly occurs during the first month of breastfeeding. (Correct Answer)
B. NSAIDs are contraindicated in this condition.
C. The patient is suffering from periductal mastitis.
D. Breastfeeding is contraindicated.

Explanation: The patient is presenting with **Lactational Mastitis**, a common inflammatory condition of the breast typically caused by *Staphylococcus aureus* entering through cracks or fissures in the nipple. ### **Explanation of Options:** * **Option A (Correct):** Lactational mastitis most frequently occurs during the **first 6 weeks (first month)** of breastfeeding. This is due to the mother and infant adjusting to breastfeeding techniques, leading to milk stasis or nipple trauma, which facilitates bacterial entry. * **Option B (Incorrect):** NSAIDs (like Ibuprofen) are the **first-line treatment** for pain and inflammation in mastitis. They are safe during breastfeeding and help facilitate continued milk drainage. * **Option C (Incorrect):** **Periductal mastitis** is a condition typically seen in **smokers** and is unrelated to lactation. It involves inflammation of the subareolar ducts and often presents with recurrent abscesses. * **Option D (Incorrect):** Breastfeeding is **not contraindicated**; in fact, frequent emptying of the breast (via feeding or pumping) is the cornerstone of management to prevent the progression to a breast abscess. ### **High-Yield Clinical Pearls for NEET-PG:** * **Most common organism:** *Staphylococcus aureus*. * **Management:** Continued breastfeeding + NSAIDs + Antibiotics (Flucloxacillin or Dicloxacillin). * **Complication:** If a fluctuant mass develops, suspect a **Breast Abscess**. The gold standard treatment is **Ultrasound-guided needle aspiration** (preferred over Incision & Drainage to avoid milk fistula). * **Differentiating Factor:** Unlike lactational mastitis, **Inflammatory Breast Cancer** presents with *peau d'orange* and does not respond to antibiotics.

Question 78: The Gail Model is used for risk assessment of which of the following?

A. Ovarian cancer
B. Prostate cancer
C. Breast cancer (Correct Answer)
D. Lung cancer

Explanation: **Explanation:** The **Gail Model** (also known as the Breast Cancer Risk Assessment Tool) is a widely used clinical tool designed to estimate a woman's risk of developing **invasive breast cancer** over the next five years and over her lifetime (up to age 90). It utilizes specific personal and family history factors to calculate risk. **Why Breast Cancer is Correct:** The model incorporates key risk factors including: * Current age. * Age at menarche. * Age at first live birth. * Number of previous breast biopsies and presence of atypical hyperplasia. * Number of first-degree relatives with breast cancer. * Race/ethnicity. **Why Other Options are Incorrect:** * **Ovarian Cancer:** Risk is typically assessed using the **ROMA score** (Risk of Ovarian Malignancy Algorithm) or genetic testing for BRCA1/2 mutations. * **Prostate Cancer:** Screening and risk are primarily assessed via **PSA levels** and the **IPSS score** (for symptoms), not the Gail Model. * **Lung Cancer:** Risk is determined by smoking history (pack-years) and assessed using low-dose CT screening criteria (e.g., USPSTF guidelines). **High-Yield Clinical Pearls for NEET-PG:** * **Threshold for Intervention:** A 5-year risk score of **≥1.67%** is considered "high risk." In such patients, chemoprevention with Selective Estrogen Receptor Modulators (SERMs) like **Tamoxifen** or **Raloxifene** may be indicated. * **Limitations:** The Gail Model **underestimates** risk in women with a strong family history of paternal breast cancer or those with known **BRCA1/2 mutations**. For these patients, the **Claus Model** or **BRCAPRO** is preferred. * **Modified Gail Model:** This version is specifically validated for use in various ethnic groups, including Asian Americans.

Question 79: A 42-year-old woman presents with a swollen, painful, erythematous left breast which does not respond to a 10-day course of oxacillin. Ultrasound reveals no abscess. What is the next step in management?

A. Begin a 10-day course of vancomycin
B. Workup the patient for an immunosuppressive disease
C. Incision and drainage of the area
D. Biopsy the skin and parenchyma of the breast (Correct Answer)

Explanation: **Explanation:** The clinical presentation of a painful, erythematous, and swollen breast that fails to respond to antibiotics is a classic "red flag" for **Inflammatory Breast Cancer (IBC)**. IBC often mimics acute mastitis or a breast abscess (the "masquerader"), but it is caused by the blockage of dermal lymphatics by tumor emboli rather than infection. **1. Why Option D is Correct:** When a suspected mastitis does not resolve after a standard course of antibiotics (usually 7–10 days) and ultrasound has ruled out a drainable abscess, the clinician must rule out malignancy. A **skin punch biopsy** is essential to look for **dermal lymphatic invasion**, and a core needle biopsy of the underlying parenchyma is required to confirm the primary invasive carcinoma. **2. Why Incorrect Options are Wrong:** * **Option A:** Continuing or changing antibiotics (Vancomycin) delays the diagnosis of a highly aggressive malignancy. If there is no response to the first-line agent and no abscess is present, the etiology is likely non-infectious. * **Option B:** While inflammatory conditions can occur in immunosuppressed patients, the priority in a 42-year-old with these symptoms is ruling out IBC, which carries a much higher mortality risk. * **Option C:** Incision and drainage (I&D) is contraindicated because the ultrasound specifically confirmed the **absence of an abscess**. Attempting I&D in IBC can lead to non-healing wounds and local spread of the tumor. **Clinical Pearls for NEET-PG:** * **Peau d'orange:** The characteristic "orange peel" appearance of the skin in IBC is due to cutaneous edema caused by lymphatic obstruction. * **TNM Staging:** Inflammatory Breast Cancer is automatically classified as **T4d**, making it at least Stage IIIB at presentation. * **Management Sequence:** Diagnosis (Biopsy) → Neoadjuvant Chemotherapy → Modified Radical Mastectomy (if responsive) → Radiotherapy. * **Rule of Thumb:** Any "mastitis" in a non-lactating woman or one that doesn't resolve with antibiotics must be biopsied.

Question 80: A 35-year-old premenopausal patient has recently developed a 1.5 cm sized pigmented lesion on her back. Which of the following forms of tissue diagnosis will you recommend for her?

A. Needle biopsy
B. Trucut biopsy
C. Excision biopsy (Correct Answer)
D. Incisional biopsy

Explanation: **Explanation:** The clinical presentation of a new, pigmented lesion in a 35-year-old patient must be managed with a high index of suspicion for **Malignant Melanoma**. **1. Why Excision Biopsy is the Correct Choice:** For any suspicious pigmented lesion, the gold standard for diagnosis is an **Excisional Biopsy** with a narrow margin (typically 1–3 mm). The primary reason is that the prognosis and surgical management of melanoma are determined by the **Breslow Depth** (the vertical thickness of the tumor in millimeters). An excisional biopsy provides the pathologist with the entire architecture of the lesion, allowing for an accurate measurement of depth and ensuring no "sampling error" occurs. **2. Why Other Options are Incorrect:** * **Needle Biopsy (FNAC) & Trucut Biopsy (Options A & B):** These provide only cytological or small architectural samples. They are insufficient for determining the Breslow depth and have a high rate of false negatives in pigmented lesions. * **Incisional Biopsy (Option D):** This involves taking only a piece of the lesion. It is generally contraindicated for small pigmented lesions because it may miss the thickest part of the tumor (leading to understaging) and theoretically risks "seeding" or disrupting the local lymphatics, though the latter is debated. It is only reserved for very large lesions or those in cosmetically sensitive areas (e.g., face, subungual). **Clinical Pearls for NEET-PG:** * **Breslow Thickness:** The most important prognostic factor in cutaneous melanoma. * **ABCDE Criteria:** Used to identify suspicious lesions (Asymmetry, Border irregularity, Color variegation, Diameter >6mm, Evolving). * **Safety Margins:** Once melanoma is confirmed via excision biopsy, a **Wide Local Excision (WLE)** is performed with margins based on the Breslow depth (e.g., 1 cm margin for depth <1 mm; 2 cm margin for depth >2 mm).

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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