Breast Surgery — MCQs

Breast Surgery Indian Medical PG Practice Questions and MCQs

Question 41: All the following structures are preserved in modified radical mastectomy except?

A. Subclavian vein
B. Intercostobrachial nerve (Correct Answer)
C. Long thoracic nerve
D. Nerve to latissimus dorsi

Explanation: In a **Modified Radical Mastectomy (MRM)**, the goal is to remove the entire breast tissue along with the axillary lymph nodes (Levels I and II), while preserving the pectoralis major and minor muscles and vital neurovascular structures. ### Why the Intercostobrachial Nerve is the Correct Answer The **intercostobrachial nerve** (the lateral cutaneous branch of the second intercostal nerve) traverses the axillary fat pad, which is removed during axillary lymph node dissection. While some surgeons attempt to preserve it to prevent sensory loss, it is **routinely sacrificed** in a standard MRM to ensure an adequate oncological clearance of the axillary contents. Injury or excision leads to numbness or paresthesia along the medial aspect of the upper arm. ### Explanation of Incorrect Options * **Subclavian Vein (A):** This forms the superior boundary of the axillary dissection. It must be preserved to maintain venous drainage of the upper limb; injury leads to severe hemorrhage or chronic lymphedema. * **Long Thoracic Nerve (C):** Also known as the Nerve of Bell, it supplies the **Serratus Anterior**. It must be preserved to avoid "Winging of the Scapula." * **Nerve to Latissimus Dorsi (D):** Also known as the Thoracodorsal nerve. It must be preserved to maintain the function of the Latissimus Dorsi, which is crucial for internal rotation and adduction of the arm. ### High-Yield Clinical Pearls for NEET-PG * **Patey’s MRM:** Removes Pectoralis minor; **Auchincloss MRM:** Preserves Pectoralis minor. * **Boundaries of Axillary Dissection:** Axillary vein (Superior), Latissimus dorsi (Lateral), Serratus anterior (Medial). * **Nerve most commonly injured in MRM:** Intercostobrachial nerve. * **Nerve most commonly injured in Axillary Clearance:** Long thoracic nerve (leading to functional deformity).

Question 42: A female presents with ductal carcinoma in situ of the breast with diffuse microcalcifications on mammography. She also has a family history of breast cancer. What is the best possible management?

A. Breast conservative surgery
B. Simple mastectomy (Correct Answer)
C. Modified radical mastectomy
D. Radiotherapy

Explanation: **Explanation:** The management of **Ductal Carcinoma in Situ (DCIS)** depends primarily on the extent of the disease and the ability to achieve clear surgical margins. **Why Simple Mastectomy is correct:** In this patient, the presence of **diffuse microcalcifications** on mammography indicates extensive or multicentric disease. Breast-conserving surgery (BCS) is contraindicated when the disease is widespread because it is impossible to achieve negative margins while maintaining an acceptable cosmetic result. Furthermore, a strong family history increases the risk of recurrence or contralateral cancer. For extensive DCIS, a **Simple Mastectomy** (removal of the entire breast tissue including the NAC complex, without axillary dissection) is the treatment of choice, offering a cure rate of nearly 98-99%. **Why other options are incorrect:** * **A. Breast Conservative Surgery (BCS):** This is ideal for localized DCIS. However, it is contraindicated in cases of diffuse malignant microcalcifications, multicentricity, or when the tumor-to-breast ratio is unfavorable. * **C. Modified Radical Mastectomy (MRM):** MRM involves axillary lymph node dissection. Since DCIS is a non-invasive (pre-invasive) malignancy, the risk of nodal metastasis is negligible (<1%). Therefore, routine axillary dissection is unnecessary and leads to avoidable morbidity. * **D. Radiotherapy:** While radiotherapy is used *after* BCS to reduce local recurrence, it is not a primary standalone treatment for DCIS. **Clinical Pearls for NEET-PG:** * **DCIS** is a precursor to invasive ductal carcinoma; the hallmark mammographic finding is **clustered microcalcifications**. * **Van Nuys Prognostic Index (VNPI)** is used to decide between excision alone, excision + radiation, or mastectomy in DCIS. * **Sentinel Lymph Node Biopsy (SLNB):** Should be considered during a simple mastectomy for DCIS if there is a high suspicion of occult invasion (e.g., large mass or high-grade DCIS), as SLNB cannot be performed accurately after the breast tissue is removed.

Question 43: Hormonal therapy is useful if breast cancer expresses which of the following?

A. Estrogen receptor (Correct Answer)
B. Progesterone receptor
C. HER2/neu
D. VEGF

Explanation: **Explanation:** The cornerstone of hormonal therapy in breast cancer is the presence of hormone receptors. **Estrogen Receptor (ER)** expression is the single most important predictor of response to endocrine therapies such as Selective Estrogen Receptor Modulators (SERMs like Tamoxifen) or Aromatase Inhibitors (AIs like Letrozole). These drugs work by either blocking the ER or lowering systemic estrogen levels, thereby depriving the tumor of its primary growth stimulus. * **Option A (Correct):** ER positivity is the primary indicator for hormonal therapy. Approximately 75-80% of breast cancers are ER-positive. * **Option B (Incorrect):** While **Progesterone Receptor (PR)** status is often tested alongside ER and its presence suggests a functional ER pathway (improving prognosis), the primary target and driver for initiating hormonal therapy remains the Estrogen Receptor. * **Option C (Incorrect):** **HER2/neu** is a tyrosine kinase receptor. Overexpression indicates eligibility for targeted therapy with monoclonal antibodies like **Trastuzumab**, not hormonal therapy. * **Option D (Incorrect):** **VEGF** (Vascular Endothelial Growth Factor) is involved in angiogenesis. While targeted by drugs like Bevacizumab, it is not a marker for hormonal treatment. **High-Yield Clinical Pearls for NEET-PG:** * **Best Prognostic Factor:** Number of axillary lymph nodes involved. * **Best Predictive Factor for Hormonal Response:** ER/PR status. * **Tamoxifen:** Drug of choice for ER+ tumors in **pre-menopausal** women (Risk: Endometrial carcinoma). * **Aromatase Inhibitors:** Drug of choice for ER+ tumors in **post-menopausal** women (Risk: Osteoporosis). * **Luminal A subtype** (ER+/PR+/HER2-) has the best overall prognosis.

Question 44: Mondor's disease is?

A. Superficial thrombophlebitis of the breast (Correct Answer)
B. Fat necrosis in the breast
C. Postradiation breast and arm edema
D. Skin infection over the breast

Explanation: **Explanation:** **Mondor’s Disease** is a rare condition characterized by **superficial thrombophlebitis** of the veins of the breast and anterior chest wall. It most commonly involves the **lateral thoracic vein**, the **thoracoepigastric vein**, or the **superior epigastric vein**. 1. **Why Option A is Correct:** The underlying pathology is an inflammatory process leading to a blood clot within a superficial vein. Clinically, it presents as a sudden onset of a **painful, palpable "cord-like" structure** in the breast. When the arm is elevated, a characteristic skin groove or "tethering" may be seen over the cord. It is usually self-limiting and benign. 2. **Why Other Options are Incorrect:** * **Option B:** Fat necrosis usually follows trauma and presents as a firm, irregular, painless lump that can mimic carcinoma on imaging, but it does not involve venous thrombosis. * **Option C:** Postradiation edema (and lymphedema) is caused by the disruption of lymphatic drainage, not superficial venous inflammation. * **Option D:** Skin infections (like cellulitis or mastitis) present with diffuse erythema, warmth, and systemic symptoms (fever), rather than a localized, thrombosed venous cord. **High-Yield Clinical Pearls for NEET-PG:** * **Etiology:** Often idiopathic, but can be triggered by vigorous exercise, trauma, tight clothing, or breast surgery. * **Association:** While usually benign, it can rarely be a presentation of underlying **breast malignancy** (approx. 5% of cases); hence, a mammogram is recommended to rule out cancer. * **Management:** Reassurance and symptomatic relief with **NSAIDs** and warm compresses. Anticoagulants are generally not required. * **Key Sign:** The "Iron Wire" sign (palpable cord).

Question 45: Which of the following markers indicates an increased risk of recurrent carcinoma breast?

A. CA 125
B. CA 19-9
C. CA 27-29 (Correct Answer)
D. PSA

Explanation: **Explanation:** The correct answer is **C. CA 27-29**. **Clinical Concept:** Tumor markers are biochemical substances used to monitor treatment response and detect recurrence in malignancy. For breast cancer, the most specific markers are **CA 15-3** and **CA 27-29**. Both are directed against different epitopes of the same antigen, the **MUC1 gene product** (mucin). CA 27-29 is considered slightly more sensitive than CA 15-3. An elevation in these markers in a patient previously treated for breast cancer is highly suggestive of disease recurrence or systemic metastasis, often predating clinical or radiological findings. **Analysis of Incorrect Options:** * **A. CA 125:** This is the primary marker for **Epithelial Ovarian Cancer**. While it can be elevated in various physiological (menstruation) and pathological (endometriosis, pelvic inflammatory disease) conditions, it is not specific to breast cancer. * **B. CA 19-9:** This is the marker of choice for **Pancreatic Adenocarcinoma** and is also used in biliary tract cancers (cholangiocarcinoma). * **D. PSA (Prostate-Specific Antigen):** This is a highly specific marker for **Prostate Cancer** and is used for screening, monitoring, and detecting recurrence in males. **High-Yield Pearls for NEET-PG:** * **Most sensitive marker for Breast Cancer recurrence:** CA 27-29. * **Standard marker for Breast Cancer monitoring:** CA 15-3. * **Carcinoembryonic Antigen (CEA):** Also used in breast cancer monitoring but is less specific than CA 15-3/CA 27-29 (primarily associated with Colorectal Cancer). * **Triple Negative Breast Cancer (TNBC):** Generally lacks reliable serum tumor markers, making clinical and radiological follow-up crucial. * **HER2/neu:** While a prognostic marker/target for therapy (Trastuzumab), it is not typically used as a circulating serum marker for recurrence in the same way as CA 27-29.

Question 46: Bleeding from the nipple is seen in which of the following conditions?

A. Duct ectasia, Ductal papilloma, and Fibroadenoma are true, while Chronic breast abscess and Carcinoma of Breast are false.
B. Duct ectasia, Ductal papilloma, and Fibroadenoma are false, while Chronic breast abscess and Carcinoma of Breast are true.
C. Duct ectasia, Ductal papilloma, and Carcinoma of Breast are false, while Fibroadenoma and Chronic breast abscess are true.
D. Duct ectasia, Ductal papilloma, and Carcinoma of Breast are true, while Fibroadenoma and Chronic breast abscess are false. (Correct Answer)

Explanation: **Explanation:** Bleeding from the nipple (serosanguinous or bloody discharge) is a significant clinical finding that typically indicates pathology within the ductal system of the breast. **1. Why the Correct Answer (D) is Right:** * **Ductal Papilloma:** The most common cause of spontaneous bloody nipple discharge. It is a benign neoplastic growth within a major lactiferous duct; its fragile vascular stalk easily bleeds. * **Carcinoma of Breast:** Specifically **Ductal Carcinoma in Situ (DCIS)** or invasive papillary carcinoma. Malignant erosion of the ductal epithelium leads to bleeding. * **Duct Ectasia:** Characterized by dilation of the subareolar ducts and periductal inflammation. While the discharge is often thick and creamy (green/black), it can be blood-stained due to ulceration of the duct lining. **2. Why the Other Options are Incorrect:** * **Fibroadenoma:** This is a benign tumor of the breast parenchyma (fibroepithelial). Since it does not involve the ductal lumen, it does not cause nipple discharge. * **Chronic Breast Abscess:** This typically presents with pain, a palpable mass, or skin changes. While it may cause purulent discharge through a sinus or the nipple, frank bleeding is not a characteristic feature. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of bloody nipple discharge:** Intraductal Papilloma. * **Most common cause of nipple discharge overall:** Duct Ectasia. * **Triple Assessment:** Any patient with bloody nipple discharge must undergo clinical examination, imaging (Mammography/Ultrasound), and cytology/biopsy to rule out malignancy. * **Management:** For a single duct discharge, **Microdochectomy** (removal of the involved duct) is the procedure of choice for both diagnosis and treatment. For multiple ducts, **Hadfield’s procedure** (Total duct excision) is performed.

Question 47: Which of the following conditions may be mistaken for carcinoma of the breast based on appearance?

A. Breast abscess
B. Nodular mucinosis (Correct Answer)
C. Cystosarcoma phylloides
D. Fibroadenosis

Explanation: **Explanation:** **Nodular Mucinosis** (also known as Mucocele-like lesions or focal mucinosis) is a rare benign condition characterized by the accumulation of extracellular mucin. It is the correct answer because it often presents as a **firm, irregular, and fixed mass** that clinically mimics the induration of an invasive carcinoma. On imaging (mammography/ultrasound), it can show microcalcifications or irregular margins, further complicating the clinical diagnosis and necessitating a biopsy to rule out malignancy. **Analysis of Incorrect Options:** * **Breast Abscess:** Typically presents with acute inflammatory signs—exquisite tenderness, calor (heat), rubor (redness), and fluctuation. While a chronic "cold abscess" can mimic a tumor, the acute presentation is usually distinct from the painless, progressive nature of carcinoma. * **Cystosarcoma Phylloides:** These are usually very large, smooth, and bosselated (lumpy) tumors. While they can be malignant, their rapid growth and "leaf-like" architecture on pathology distinguish them from the typical presentation of common breast carcinomas. * **Fibroadenosis (ANDI):** This is a physiological aberration (lumpy breasts) characterized by generalized heaviness and cyclical mastalgia. It lacks the discrete, hard, "stony" consistency of a carcinoma. **Clinical Pearls for NEET-PG:** * **Fat Necrosis:** This is the *most common* benign condition to mimic breast carcinoma clinically (history of trauma, skin tethering, and hard consistency). * **Plasma Cell Mastitis:** Can cause nipple retraction, another classic sign of malignancy. * **Triple Assessment:** Always remember that any suspicious lump requires clinical examination, imaging (USG/Mammography), and pathology (FNAC/Core Biopsy) to confirm the diagnosis.

Question 48: Patey's mastectomy is a type of:

A. Simple mastectomy
B. Extended mastectomy
C. Modified radical mastectomy (Correct Answer)
D. Halsted's radical mastectomy

Explanation: **Explanation:** **Patey’s mastectomy** is a specific technique of **Modified Radical Mastectomy (MRM)**. The core concept of MRM is the removal of the entire breast tissue along with the axillary lymph nodes, while preserving the pectoralis major muscle. 1. **Why Option C is Correct:** In Patey’s mastectomy, the **pectoralis minor muscle is sacrificed (excised)** to facilitate complete clearance of Level III axillary lymph nodes (apical nodes). However, the **pectoralis major muscle is preserved**, which distinguishes it from a radical mastectomy. This provides a better cosmetic result and reduces morbidity compared to older techniques. 2. **Why Other Options are Incorrect:** * **Simple Mastectomy:** Also known as Total Mastectomy, it involves removing the breast tissue and nipple-areola complex but **does not** include axillary lymph node dissection. * **Extended Mastectomy:** This refers to a Radical Mastectomy plus the removal of internal mammary lymph nodes. * **Halsted’s Radical Mastectomy:** This is a more aggressive procedure where **both** the pectoralis major and pectoralis minor muscles are removed along with the breast and all three levels of axillary nodes. **High-Yield Clinical Pearls for NEET-PG:** * **Auchincloss Mastectomy:** Another type of MRM where **both** pectoralis major and minor muscles are preserved. Level III nodes are usually not cleared. * **Madden’s Mastectomy:** Similar to Auchincloss; it preserves both muscles and is currently the most commonly performed MRM technique. * **Nerves at risk during MRM:** Long thoracic nerve (leads to Winging of Scapula), Thoracodorsal nerve (Latissimus dorsi weakness), and Intercostobrachial nerve (loss of sensation in the inner arm). * **Standard of Care:** MRM has largely replaced Halsted’s Radical Mastectomy because it offers similar survival rates with significantly less deformity.

Question 49: Fixity of the breast tissue in carcinoma of the breast indicates infiltration of what structure?

A. Suspensory ligaments
B. Lymphatics
C. Pectoralis muscle and fascia (Correct Answer)
D. Internal mammary artery

Explanation: **Explanation:** In breast carcinoma, the mobility of the breast mass is a key clinical indicator of the extent of local invasion. **Why Pectoralis Muscle and Fascia is correct:** The breast lies upon the deep pectoral fascia, which covers the pectoralis major muscle. When a tumor is mobile, it means it is confined to the breast parenchyma. **Fixity** occurs when the tumor cells infiltrate the deep pectoral fascia and the underlying pectoralis major muscle. * **Clinical Test:** Fixity is demonstrated by asking the patient to press their hands against their hips (contracting the pectoralis major). If the lump becomes fixed or its mobility is significantly restricted during contraction, it indicates infiltration of the muscle/fascia. This upstages the tumor to **T4b** in the TNM staging system. **Analysis of Incorrect Options:** * **A. Suspensory ligaments (Cooper’s ligaments):** Infiltration of these ligaments leads to **skin dimpling** or tethering, not fixity of the entire breast tissue to the chest wall. * **B. Lymphatics:** Obstruction of the subdermal lymphatics by tumor cells leads to lymphedema of the skin, resulting in the characteristic **Peau d'orange** appearance. * **D. Internal mammary artery:** This is a vascular structure providing blood supply; its involvement relates to metastasis or surgical clearance (Level III nodes) rather than mechanical fixity of the breast tissue. **High-Yield Clinical Pearls for NEET-PG:** * **Fixity to Chest Wall:** Indicates involvement of the Serratus anterior, Ribs, or Intercostal muscles (T4a). * **Paget’s Disease:** Represents DCIS involving the nipple-areola complex; characterized by large cells with clear cytoplasm (Paget cells). * **Most Common Site:** Upper Outer Quadrant (approx. 50%). * **Retraction of Nipple:** Caused by infiltration of the lactiferous ducts.

Question 50: A 67-year-old business executive and tennis player has a basal cell carcinoma removed from the right cheek. What is TRUE of basal cell carcinoma?

A. It may show a flat ulcer. (Correct Answer)
B. It may metastasize to lymph nodes.
C. It may metastasize to remote skin areas.
D. It is found exclusively in the head and neck.

Explanation: **Explanation:** Basal Cell Carcinoma (BCC) is the most common skin cancer worldwide, arising from the non-keratinizing cells of the basal layer of the epidermis. **1. Why Option A is Correct:** BCC presents with diverse clinical morphologies. The **"Rodent Ulcer"** (ulcus exedens) is a classic presentation characterized by a central depression or a **flat ulcer** surrounded by a raised, pearly, "rolled" border with telangiectasia. Other variants include nodular (most common), pigmented, and morpheaform (sclerotic). **2. Why Other Options are Incorrect:** * **Options B & C:** BCC is characterized by **local invasiveness** but an extremely low rate of metastasis (less than 0.1%). It rarely spreads to regional lymph nodes or remote skin areas. When it does, it is usually after years of neglect or in specific aggressive subtypes. * **Option D:** While approximately 80% of BCCs occur on the sun-exposed skin of the **head and neck** (especially above the line joining the lobe of the ear to the angle of the mouth), it can occur on any hair-bearing skin surface, including the trunk and extremities. It is notably absent on non-hair-bearing areas like palms and soles. **Clinical Pearls for NEET-PG:** * **Risk Factor:** Chronic UV light exposure is the primary trigger. * **Growth Pattern:** It is a "slow-growing" tumor that destroys local tissues (hence "Rodent Ulcer") but rarely kills via metastasis. * **Management:** Surgical excision with negative margins is the gold standard. **Mohs Micrographic Surgery** is the treatment of choice for high-risk areas (face/medial canthus) to ensure maximum tissue preservation. * **Inheritance:** Associated with **Gorlin Syndrome** (Basal Cell Nevus Syndrome), which includes multiple BCCs, odontogenic keratocysts, and bifid ribs.

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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