Breast Surgery — MCQs
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A 65-year-old light-complexioned male presents with a solitary scaly plaque-like lesion on his forearm, present for many years. The lesion is 0.5 cm in diameter. Shave biopsy reveals intraepithelial squamous cell carcinoma (Bowen's disease) that was incompletely excised. What is the most appropriate further treatment?
Serous or serosanguinous nipple discharge may be suggestive of all of the following except?
Mondor's disease of the breast is a variant of:
All are risk factors for Carcinoma breast except?
Which of the following statements regarding male breast cancer is INCORRECT?
A distressing complication of radical mastectomy is:
Which is the most common cause of bloody discharge from a single breast duct?
What is the most common organism isolated in breast abscess?
Cystosarcoma phyllodes is best treated by:
Risk factors for the development of breast cancer include all of the following, EXCEPT:
Breast Surgery Indian Medical PG Practice Questions and MCQs
Question 131: A 65-year-old light-complexioned male presents with a solitary scaly plaque-like lesion on his forearm, present for many years. The lesion is 0.5 cm in diameter. Shave biopsy reveals intraepithelial squamous cell carcinoma (Bowen's disease) that was incompletely excised. What is the most appropriate further treatment?
- A. Wide excision of the lesion and sentinel node biopsy
- B. Referral for local radiation therapy
- C. Excision and repair of this area, ensuring clear surgical margins (Correct Answer)
- D. No further treatment indicated
Explanation: ### Explanation **Core Concept: Management of Bowen’s Disease (Squamous Cell Carcinoma in situ)** Bowen’s disease is a form of **intraepithelial squamous cell carcinoma (SCC)**, meaning the malignant cells are confined to the epidermis without invasion through the basement membrane. The primary goal of treatment is complete eradication to prevent progression to invasive SCC (which occurs in ~3-5% of cases). **Why Option C is Correct:** The initial shave biopsy showed **incomplete excision**. For a localized, small (0.5 cm) lesion of Bowen’s disease, **surgical excision with clear margins** (typically 4–5 mm) is the gold standard. It provides a definitive specimen for histopathological examination to ensure no invasive component was missed and confirms clear margins, which minimizes the risk of recurrence. **Why Other Options are Incorrect:** * **Option A:** Sentinel node biopsy is indicated for invasive malignancies with a high risk of metastasis (e.g., thick melanoma or high-stage invasive SCC). It is **not** indicated for *in situ* lesions like Bowen’s disease, as they lack metastatic potential until they breach the basement membrane. * **Option B:** Radiation therapy is generally reserved for patients who are poor surgical candidates or for lesions in anatomically difficult areas (e.g., eyelids, ears) where surgery would cause significant morbidity. It is not the first-line treatment for a small, accessible forearm lesion. * **Option D:** "No further treatment" is incorrect because the biopsy confirmed incomplete excision. Residual disease carries a risk of recurrence and progression to invasive SCC. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Presentation:** Typically presents as a slow-growing, well-demarcated, erythematous, scaly plaque (often mistaken for psoriasis or eczema). * **Risk Factors:** Chronic UV exposure (most common), arsenic exposure, and HPV (especially on periungual/genital areas). * **Histology:** Full-thickness epidermal dysplasia, "windblown" appearance of nuclei, and intact basement membrane. * **Erythroplasia of Queyrat:** This is the specific term for Bowen’s disease occurring on the glans penis.
Question 132: Serous or serosanguinous nipple discharge may be suggestive of all of the following except?
- A. Mastitis (Correct Answer)
- B. Carcinoma
- C. Duct ectasia
- D. Intraductal papilloma
Explanation: **Explanation:** The correct answer is **Mastitis**. **1. Why Mastitis is the correct answer:** Mastitis is an inflammatory/infectious condition of the breast, typically associated with lactation. It characteristically presents with **purulent (pus-like)** nipple discharge, along with systemic symptoms like fever and local signs of inflammation (rubor, tumor, calor, dolor). Serous (straw-colored) or serosanguinous (blood-tinged) discharge is not a feature of acute infection but rather suggests proliferative or neoplastic changes in the ductal epithelium. **2. Analysis of Incorrect Options:** * **Intraductal Papilloma:** This is the **most common cause** of serosanguinous or bloody nipple discharge. It is a benign growth within the duct. * **Carcinoma:** While less common than benign causes, breast cancer (especially Ductal Carcinoma In Situ) can present with serous or bloody discharge, particularly if it involves the major lactiferous ducts. * **Duct Ectasia:** This involves the dilation of subareolar ducts. While it often presents with thick, multicolored (green/creamy) discharge, it can also present with serous or blood-stained discharge due to periductal inflammation and erosion. **3. NEET-PG High-Yield Pearls:** * **Most common cause of bloody nipple discharge:** Intraductal Papilloma. * **Most common cause of milky discharge (non-lactational):** Hyperprolactinemia (Galactorrhea). * **Management:** Any spontaneous, unilateral, single-duct discharge (especially if bloody) requires a **Triple Assessment** to rule out malignancy. * **Surgical Procedure:** For single duct discharge, **Microdochectomy** is the procedure of choice; for multiple duct discharge (e.g., ectasia), **Hadfield’s procedure** (Total Duct Excision) is performed.
Question 133: Mondor's disease of the breast is a variant of:
- A. Mycotic infection
- B. Malignancy
- C. Thrombophlebitis (Correct Answer)
- D. Lymphadenitis
Explanation: **Explanation:** **Mondor’s disease** is a clinical 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 Thrombophlebitis is correct:** The underlying pathology is the inflammation and subsequent clotting (thrombosis) within these superficial veins. This leads to the classic clinical presentation of a **palpable, tender, "cord-like" structure** under the skin. When the arm is raised, the skin may show a characteristic groove or "tethering" over the affected vein. 2. **Why other options are incorrect:** * **Mycotic infection:** Mondor’s is a vascular inflammatory process, not a fungal infection. * **Malignancy:** While Mondor’s is benign and usually self-limiting, it can occasionally mask or be associated with an underlying breast cancer (in <5% of cases). However, the disease itself is not a malignancy. * **Lymphadenitis:** This refers to the inflammation of lymph nodes. Mondor’s involves the venous system, not the lymphatic chains. **High-Yield Clinical Pearls for NEET-PG:** * **Etiology:** Often idiopathic, but can follow trauma, vigorous exercise, or breast surgery. * **Management:** It is a **self-limiting** condition. Treatment is conservative, involving NSAIDs for pain and warm compresses. Anticoagulants are generally not required. * **Diagnosis:** Primarily clinical; however, Doppler ultrasound can confirm the presence of a non-compressible superficial vein. * **Key Sign:** A "string-like" subcutaneous cord that becomes prominent on abduction of the arm.
Question 134: All are risk factors for Carcinoma breast except?
- A. Nulliparity
- B. Obesity
- C. Early menopause (Correct Answer)
- D. Lack of breast feeding
Explanation: **Explanation:** The primary driver for the development of breast carcinoma is **prolonged cumulative exposure to estrogen**. Estrogen promotes the proliferation of mammary epithelial cells, increasing the likelihood of DNA mutations. **Why Early Menopause is the Correct Answer:** Early menopause (cessation of menstruation before age 45) is actually a **protective factor**, not a risk factor. It shortens the total duration of the "estrogen window" in a woman’s life. Conversely, **late menopause** (after age 55) is a significant risk factor because it extends the period of hormonal exposure. **Analysis of Incorrect Options:** * **Nulliparity:** Pregnancy causes a temporary cessation of the menstrual cycle and induces terminal differentiation of breast cells. Women who have never been pregnant (nulliparous) have more menstrual cycles and higher lifetime estrogen exposure. * **Obesity:** In postmenopausal women, adipose tissue is the primary site for the peripheral conversion of androstenedione to estrone (via the enzyme **aromatase**). Increased BMI leads to higher circulating estrogen levels. * **Lack of Breastfeeding:** Breastfeeding suppresses ovulation (lactational amenorrhea) and promotes the maturation of ductal epithelium. A lack of breastfeeding results in more ovulatory cycles and higher risk. **High-Yield Clinical Pearls for NEET-PG:** * **The "Estrogen Window" Concept:** Risk increases with **early menarche** (<12 years) and **late menopause** (>55 years). * **First Full-term Pregnancy:** Having the first child after age 30 is a greater risk factor than nulliparity. * **Genetic Factors:** BRCA1 (Chromosome 17) and BRCA2 (Chromosome 13) are the most common high-penetrance mutations. * **Protective Factors:** Early pregnancy, prolonged breastfeeding, physical activity, and early menopause.
Question 135: Which of the following statements regarding male breast cancer is INCORRECT?
- A. BRCA2 mutations are seen in approximately 6% of cases.
- B. Lobular carcinoma is the commonest subtype. (Correct Answer)
- C. Ductal carcinoma is the most common subtype.
- D. Colloid carcinoma can be seen.
Explanation: **Explanation:** Male breast cancer is a rare malignancy, accounting for less than 1% of all breast cancers. The key to answering this question lies in understanding the anatomy of the male breast. **1. Why Option B is Incorrect (The Correct Answer):** In males, the breast tissue consists primarily of ducts and stroma but lacks well-developed **lobules** (the milk-producing units). Since lobules are absent or rudimentary, **Lobular Carcinoma is extremely rare** in men. Therefore, the statement that it is the "commonest subtype" is false. **2. Analysis of Other Options:** * **Option C (Ductal Carcinoma):** This is the **most common subtype**, accounting for approximately 85-90% of cases. Specifically, Invasive Ductal Carcinoma (NOS) is the most frequent histological finding. * **Option A (BRCA2 Mutations):** Genetic predisposition is a significant risk factor. While BRCA1 mutations are more common in female breast cancer, **BRCA2 mutations** are more strongly associated with male breast cancer, seen in roughly 4–10% of cases. * **Option D (Colloid Carcinoma):** Though rare, various histological subtypes seen in females, including colloid (mucinous), papillary, and medullary carcinomas, can occur in males. **Clinical Pearls for NEET-PG:** * **Most common presentation:** A painless, firm subareolar mass (due to the central location of ductal tissue). * **Risk Factors:** Klinefelter syndrome (highest risk), BRCA2 mutation, liver cirrhosis (hyperestrogenism), and radiation exposure. * **Receptor Status:** Male breast cancers are more likely to be **ER/PR positive** compared to female breast cancers. * **Staging & Treatment:** Staging is the same as in females. Modified Radical Mastectomy (MRM) is the standard surgical approach. Tamoxifen is the hormonal therapy of choice.
Question 136: A distressing complication of radical mastectomy is:
- A. Paralysis of the fifth finger of the hand
- B. Edema of the arm (Correct Answer)
- C. Loss of sensation of the medial side of the arm
- D. Frequent skin infections of the hand on the affected side
Explanation: **Explanation:** **Correct Answer: B. Edema of the arm** Edema of the arm (Lymphedema) is considered the most distressing long-term complication of Radical Mastectomy (Halsted Mastectomy) or Modified Radical Mastectomy (MRM). It occurs due to the extensive clearance of Level I, II, and III axillary lymph nodes and the disruption of lymphatic drainage channels. This leads to chronic accumulation of protein-rich fluid in the interstitial space, causing limb swelling, heaviness, and functional impairment. While modern techniques like Sentinel Lymph Node Biopsy (SLNB) have reduced its incidence, it remains a significant morbidity in radical procedures. **Analysis of Incorrect Options:** * **A. Paralysis of the fifth finger:** This would imply an injury to the **Ulnar nerve**. While the long thoracic and thoracodorsal nerves are at risk during axillary dissection, the ulnar nerve is generally not involved in standard breast surgery. * **C. Loss of sensation of the medial side of the arm:** This is caused by the sacrifice of the **Intercostobrachial nerve** (T2). While this is the *most common* minor complication of axillary dissection, it is usually described as "numbness" rather than "distressing" compared to the functional impact of lymphedema. * **D. Frequent skin infections:** While lymphedema predisposes a patient to cellulitis (lymphangitis), the infections are a *consequence* of the underlying edema, not the primary complication itself. **High-Yield Clinical Pearls for NEET-PG:** * **Winged Scapula:** Caused by injury to the **Long Thoracic Nerve (Nerve of Bell)**, which supplies the Serratus Anterior. * **Weakness in Adduction/Internal Rotation:** Caused by injury to the **Thoracodorsal Nerve**, which supplies the Latissimus Dorsi. * **Stewart-Treves Syndrome:** A rare but lethal **angiosarcoma** that develops in a limb affected by chronic long-standing lymphedema (usually >10 years post-mastectomy).
Question 137: Which is the most common cause of bloody discharge from a single breast duct?
- A. Duct papilloma (Correct Answer)
- B. Duct ectasia
- C. Breast cancer
- D. Paget’s disease
Explanation: **Explanation:** The most common cause of spontaneous, bloody nipple discharge from a single duct (uniductal) is an **Intraductal Papilloma**. This is a benign, finger-like growth within the lactiferous ducts. Because these lesions are fragile and highly vascular, they tend to bleed easily into the ductal lumen, leading to serosanguinous or frankly bloody discharge. **Analysis of Options:** * **Duct Ectasia:** Typically presents with thick, multicolored (green, brown, or creamy) discharge, often from multiple ducts (multiductal). It is more common in perimenopausal women and is associated with subareolar inflammation. * **Breast Cancer:** While malignancy (especially DCIS) must be ruled out, it is the cause of bloody discharge in only about 5–15% of cases. It is more likely if the discharge is associated with a palpable mass or occurs in older, post-menopausal patients. * **Paget’s Disease:** This is a form of breast cancer involving the nipple-areola complex. It typically presents with eczematous skin changes, scaling, and ulceration of the nipple rather than isolated ductal discharge. **Clinical Pearls for NEET-PG:** * **Triple Assessment:** Any suspicious nipple discharge requires clinical examination, imaging (Mammography/Ultrasound), and cytology/biopsy. * **Management:** The definitive treatment for a symptomatic intraductal papilloma is **Microdochectomy** (excision of the involved duct). * **Risk:** Solitary papillomas are generally benign, but multiple papillomas (papillomatosis) carry a slightly increased risk of future breast cancer. * **Most common cause of discharge overall:** Physiological/Galactorrhea (usually bilateral and milky).
Question 138: What is the most common organism isolated in breast abscess?
- A. Streptococcus
- B. Staphylococcus aureus (Correct Answer)
- C. Klebsiella
- D. E coli
Explanation: **Explanation:** **Staphylococcus aureus** is the most common organism isolated in breast abscesses, particularly in lactational (puerperal) mastitis. The underlying medical concept involves the entry of skin flora or the infant's nasopharyngeal flora into the breast tissue through cracked or abraded nipples. Once inside the milk ducts, the bacteria proliferate in the stagnant milk, leading to cellulitis and subsequent abscess formation. * **Staphylococcus aureus (Correct):** It is responsible for the majority of cases. Notably, Methicillin-resistant *S. aureus* (MRSA) is becoming increasingly common in community-acquired breast abscesses. * **Streptococcus (Incorrect):** While *Streptococcus pyogenes* can cause diffuse mastitis (cellulitis) characterized by rapid spread, it rarely results in localized abscess formation compared to *S. aureus*. * **E. coli and Klebsiella (Incorrect):** These gram-negative bacilli are rare causes of primary breast abscesses. They are typically only seen in immunocompromised patients or as part of a mixed flora in chronic, neglected cases. **High-Yield Clinical Pearls for NEET-PG:** 1. **Lactational Abscess:** Most common in the first few weeks of breastfeeding. The treatment of choice is **ultrasound-guided needle aspiration** (preferred over Incision & Drainage to avoid milk fistula and scarring). 2. **Antibiotics:** Flucloxacillin or Erythromycin are standard; however, breastfeeding should **continue** from the affected side to prevent further milk stasis. 3. **Non-Lactational Abscess:** Often associated with smoking and periareolar inflammation (Zuska’s disease). These are frequently polymicrobial, involving anaerobes (e.g., *Bacteroides*). 4. **Chronic Abscess:** If an abscess does not resolve, a biopsy is mandatory to rule out **Inflammatory Breast Cancer**.
Question 139: Cystosarcoma phyllodes is best treated by:
- A. Simple mastectomy (Correct Answer)
- B. Lumpectomy
- C. Radiotherapy
- D. Radical mastectomy
Explanation: **Explanation:** **Cystosarcoma Phyllodes** (Phyllodes tumor) is a fibroepithelial tumor characterized by a "leaf-like" growth pattern. Unlike breast adenocarcinoma, it arises from the intralobular stroma and behaves more like a sarcoma than a typical carcinoma. **1. Why Simple Mastectomy is correct:** The mainstay of treatment for Phyllodes tumor is **wide local excision** with at least a 1 cm margin. However, these tumors are often very large (giant tumors) or involve a significant portion of the breast. In such cases, where a 1 cm margin cannot be achieved without compromising the cosmetic result or if the tumor is recurrent, a **Simple Mastectomy** is the treatment of choice. It ensures complete removal of the stromal tissue, which is critical because Phyllodes tumors have a high propensity for local recurrence. **2. Why other options are incorrect:** * **Lumpectomy:** Standard lumpectomy (often used for fibroadenomas) involves shelling out the tumor. This is inadequate for Phyllodes because it leads to extremely high local recurrence rates due to microscopic stromal projections. * **Radiotherapy:** Phyllodes tumors are generally **radioresistant**. Radiation is not a primary treatment modality, though it may be considered in rare, high-grade malignant cases with positive margins. * **Radical Mastectomy:** This involves removing the pectoralis muscles and axillary lymph nodes. Since Phyllodes tumors spread via the **hematogenous route** (like sarcomas) and rarely involve lymph nodes (<1%), axillary dissection or radical surgery is unnecessary. **High-Yield Clinical Pearls for NEET-PG:** * **Age:** Usually occurs in the 4th–5th decade (older than fibroadenoma). * **Clinical Feature:** Rapidly enlarging, painless, mobile mass; may cause pressure necrosis of the overlying skin. * **Pathology:** Characterized by increased stromal cellularity and "leaf-like" processes. * **Metastasis:** Most common site is the **Lungs**. * **Axillary Nodes:** Lymphadenopathy is usually reactive; formal axillary clearance is NOT indicated.
Question 140: Risk factors for the development of breast cancer include all of the following, EXCEPT:
- A. Early menarche
- B. Bearing first child after the age of 35
- C. Positive family history of breast cancer
- D. Multiparous women (Correct Answer)
Explanation: The risk of developing breast cancer is primarily linked to the **cumulative lifetime exposure of breast tissue to estrogen**. Estrogen promotes the proliferation of mammary epithelial cells, increasing the likelihood of DNA mutations. ### **Explanation of the Correct Option** **D. Multiparous women:** This is the correct answer because multiparity is actually a **protective factor**, not a risk factor. Pregnancy and breastfeeding induce terminal differentiation of breast epithelium and cause a prolonged suppression of the ovulatory cycle (amenorrhea). This reduces the total number of menstrual cycles and, consequently, the lifetime exposure to estrogen. ### **Explanation of Incorrect Options (Risk Factors)** * **A. Early menarche:** Starting menstruation at a young age (typically <12 years) increases the total duration of estrogen exposure over a woman's lifetime, thereby increasing risk. * **B. Late first pregnancy:** Bearing the first child after age 35 (or nulliparity) is a known risk factor. Early full-term pregnancy (before age 20) is protective because it triggers early maturation of breast cells, making them less susceptible to carcinogenesis. * **C. Positive family history:** Approximately 5-10% of breast cancers are hereditary. Having a first-degree relative with breast cancer significantly increases risk, especially if associated with BRCA1 or BRCA2 mutations. ### **High-Yield Clinical Pearls for NEET-PG** * **Gail Model:** The most commonly used clinical tool to estimate the risk of developing invasive breast cancer. * **Protective Factors:** Early menopause, early first pregnancy, breastfeeding, and physical activity. * **Dietary/Lifestyle Risks:** Obesity (post-menopausal), high alcohol intake, and Hormone Replacement Therapy (HRT). * **The "Window of Vulnerability":** The period between menarche and the first full-term pregnancy is when breast tissue is most sensitive to environmental carcinogens.
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
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Oncoplastic Breast Surgery
Practice Questions
Sentinel Lymph Node Biopsy
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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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