Breast Surgery Practice Questions

Q: A distressing complication of radical mastectomy is:

Edema of the arm. **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).

Q: What is the most common organism isolated in breast abscess?

Staphylococcus aureus. **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**.

Q: Regarding breast cancer, all are true except?

Medullary cancer has the poorest prognosis.. **Explanation:** The correct answer is **B**, as Medullary carcinoma of the breast is actually associated with a **favorable prognosis** compared to the more common Invasive Ductal Carcinoma (NOS), despite often being high-grade and "triple-negative." **1. Why Option B is the "Except" (Correct Answer):** Medullary carcinoma typically presents in younger patients (often associated with BRCA1 mutations). Histologically, it shows high-grade nuclei and a dense lymphocytic infiltrate. Despite these aggressive features, it has a better 10-year survival rate than standard infiltrating ductal carcinomas. The **poorest prognosis** in breast cancer is generally associated with **Inflammatory Breast Cancer** or **Metaplastic Carcinoma.** **2. Analysis of Other Options:** * **Option A:** Risk increases with age. The incidence of breast cancer rises significantly after age 40, with the majority of cases occurring in postmenopausal women. * **Option B:** Involvement of subdermal lymphatics leads to **Peau d'orange**, a hallmark of Inflammatory Breast Cancer (T4d). This signifies advanced disease and carries a very poor prognosis. * **Option D:** Prolonged estrogen exposure (early menarche, late menopause, HRT, or nulliparity) is a well-established risk factor for the development of breast cancer. **High-Yield Clinical Pearls for NEET-PG:** * **Most common type:** Invasive Ductal Carcinoma (NOS). * **Best prognosis:** Tubular and Mucinous (Colloid) carcinomas. * **Molecular Subtypes:** Luminal A has the best prognosis; Basal-like (Triple Negative) has a poor prognosis. * **Sentinel Lymph Node Biopsy (SLNB):** The gold standard for axillary staging in clinically node-negative (cN0) patients. * **Paget’s Disease of the Nipple:** Associated with an underlying DCIS or invasive carcinoma in >95% of cases.

Q: Where are Rotter's lymph nodes located?

Interpectoral region. **Explanation:** **Rotter’s lymph nodes**, also known as **interpectoral nodes**, are a specific group of lymph nodes located between the **pectoralis major** and **pectoralis minor** muscles. In the surgical management of breast cancer, these nodes are considered part of the **Level II** axillary lymph nodes. * **Why Option D is correct:** By definition, Rotter's nodes reside in the interpectoral fascia. They serve as a potential pathway for direct lymphatic drainage from the breast to the higher axillary levels (Level III), bypassing Levels I and II. * **Why Options A & C are incorrect:** The **infraclavicular nodes** are classified as **Level III** axillary nodes (located medial/superior to the pectoralis minor), while **supraclavicular nodes** are considered N3 disease (distant metastasis) in the TNM staging of breast cancer, located above the clavicle. * **Why Option B is incorrect:** The **mediastinum** contains internal mammary nodes (medial drainage), but Rotter’s nodes are strictly associated with the axillary drainage system. **High-Yield Clinical Pearls for NEET-PG:** * **Berg’s Levels of Axillary Nodes:** * **Level I:** Lateral to pectoralis minor. * **Level II:** Deep to pectoralis minor (includes **Rotter’s nodes**). * **Level III:** Medial to pectoralis minor. * **Surgical Significance:** During a Modified Radical Mastectomy (MRM), if Rotter’s nodes are palpably enlarged, the interpectoral fascia must be cleared to ensure complete oncological resection. * **Drainage:** They receive lymph directly from the mammary gland and drain into Level II and III nodes.

Q: What is the first investigation to be done in a lactating woman with a painful breast?

Ultrasound (USG). **Explanation:** The correct answer is **Ultrasound (USG)**. In a lactating woman presenting with a painful breast, the most common clinical concern is **Lactational Mastitis** or a **Breast Abscess**. **Why USG is the first investigation:** 1. **Safety:** USG involves no ionizing radiation, making it safe for both the mother and the nursing infant. 2. **Diagnostic Accuracy:** It is the gold standard for differentiating between simple mastitis (cellulitis) and a breast abscess (fluid collection). If an abscess is present, USG can guide needle aspiration for both diagnosis and treatment. 3. **Breast Density:** Lactating breasts are physiologically dense due to glandular hyperplasia. USG is far superior to mammography in visualizing lesions within dense breast tissue. **Why other options are incorrect:** * **Mammography:** It is difficult to interpret in lactating women due to high parenchymal density (low sensitivity). Furthermore, the compression required is extremely painful in an acutely inflamed breast and carries a risk of radiation. * **CT Scan:** It is not a primary modality for breast imaging. It lacks the resolution for detailed breast anatomy and involves significant radiation. * **MRI:** While highly sensitive, it is expensive, time-consuming, and unnecessary for diagnosing common inflammatory conditions like mastitis or abscesses. **Clinical Pearls for NEET-PG:** * **Triple Assessment:** Clinical examination, Imaging (USG 35 yrs), and Pathology (FNAC/Biopsy). * **Management:** For a lactational abscess, **ultrasound-guided needle aspiration** is now preferred over traditional Incision and Drainage (I&D) as it allows for continued breastfeeding and results in less scarring. * **Breastfeeding:** Patients should be encouraged to **continue breastfeeding** from the affected breast to prevent milk stasis, unless there is frank pus draining from the nipple.

Q: All of the following conditions are associated with an increased risk of breast cancer, except?

Hereditary nonpolyposis colorectal cancer (HNPCC). **Explanation:** The correct answer is **D. Hereditary nonpolyposis colorectal cancer (HNPCC)**, also known as **Lynch Syndrome**. **1. Why HNPCC is the correct answer:** Lynch Syndrome is caused by germline mutations in DNA mismatch repair (MMR) genes (*MLH1, MSH2, MSH6, PMS2*). While it significantly increases the risk of **colorectal, endometrial, ovarian, gastric, and urinary tract cancers**, it is **not** classically associated with an increased risk of breast cancer. In the context of NEET-PG, breast cancer is not considered part of the Lynch syndrome tumor spectrum. **2. Analysis of incorrect options:** * **Peutz-Jeghers Syndrome (PJS):** Caused by *STK11* mutations. It is characterized by hamartomatous polyps and mucocutaneous pigmentation. Patients have a significantly elevated lifetime risk of breast cancer (approx. 30-50%). * **Cowden Syndrome:** Part of the PTEN Hamartoma Tumor Syndrome. Mutations in the *PTEN* gene lead to multiple hamartomas and a very high lifetime risk of breast cancer (up to 85%). * **BRCA 1 Mutation:** This is the most well-known genetic risk factor for breast cancer. BRCA1 mutations carry a lifetime breast cancer risk of 60-80% and are also associated with ovarian and pancreatic cancers. **Clinical Pearls for NEET-PG:** * **Li-Fraumeni Syndrome (*TP53*):** Another high-yield association with early-onset breast cancer, sarcomas, and adrenocortical carcinomas. * **Lynch Syndrome Mnemonic:** Remember **"CEO"** (Colorectal, Endometrial, Ovarian) for the primary associated malignancies. * **Ataxia-Telangiectasia:** Carriers of the *ATM* gene mutation also have an increased risk of breast cancer.

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

Mammography. ### Explanation The management of a breast lump follows the **Triple Assessment** protocol: Clinical Examination, Imaging, and Pathology (Biopsy). **Why Mammography is the correct answer:** In a woman aged **45 years**, the breast tissue is typically less dense and more fatty, making **Mammography** the gold-standard initial imaging modality. It helps characterize the lesion (looking for microcalcifications or spiculation) and screens the contralateral breast for occult lesions. In the NEET-PG context, the age cutoff for choosing Mammography over Ultrasound is generally **35 years**. Since this patient is 45, Mammography is the mandatory next step after clinical examination. **Analysis of Incorrect Options:** * **Fine Needle Aspiration Cytology (FNAC):** While part of the triple assessment, imaging should ideally precede tissue diagnosis to avoid hematomas that might interfere with radiological interpretation. Furthermore, Core Needle Biopsy (CNB) has largely replaced FNAC as the preferred pathological tool. * **Ultrasound (USG):** This is the investigation of choice for women **<35 years** (due to dense breasts) or to differentiate between cystic and solid lesions. In a 45-year-old, it is used as an adjunct to mammography, not the primary next step. * **Excision Biopsy:** This is an invasive procedure and is never the "next" step. It is only indicated if triple assessment is inconclusive or if the lesion is suspicious despite negative imaging/cytology. **Clinical Pearls for NEET-PG:** * **Triple Assessment Accuracy:** If all three components (Clinical, Imaging, Pathology) are concordant, the diagnostic accuracy is >99%. * **Age Cutoff:** 35 years = Mammography. * **BIRADS Scoring:** Used in mammography to standardize reporting (BIRADS 1-6). * **Gold Standard for Diagnosis:** Core Needle Biopsy (CNB) is superior to FNAC as it preserves tissue architecture and allows for IHC (ER/PR/HER2) testing.

Q: In breast conservative surgery, what is the typically healthy margin excised?

1 cm. **Explanation:** The goal of **Breast Conservative Surgery (BCS)**, such as lumpectomy or wide local excision, is to remove the primary tumor with a clear margin of healthy tissue while preserving the cosmetic appearance of the breast. **1. Why 1 cm is correct:** Traditionally, a **1 cm margin** of healthy tissue is excised circumferentially around the tumor to ensure "negative margins." In modern surgical oncology, the consensus (SSO-ASTRO guidelines) for invasive carcinoma is "no ink on tumor," meaning even a microscopic margin is acceptable. However, for the purpose of standard surgical practice and competitive exams like NEET-PG, **1 cm** remains the classic benchmark for a healthy macroscopic margin to minimize the risk of local recurrence. **2. Why other options are incorrect:** * **2 cm & 3 cm:** These margins are excessively large for BCS. Excising this much healthy tissue significantly compromises the cosmetic outcome, defeating the primary purpose of "conservation." * **5 cm:** This margin is historically associated with **Radical Mastectomies** or the excision of very large benign tumors (like Giant Fibroadenomas). In malignant cases, a 5 cm margin would essentially result in a mastectomy. **Clinical Pearls for NEET-PG:** * **Absolute Contraindications for BCS:** Multicentric disease, prior radiation to the breast/chest wall, pregnancy (first/second trimester), and persistent positive margins after re-excision. * **Mandatory Adjunct:** BCS must *always* be followed by **Radiotherapy** to the remaining breast tissue to reduce recurrence rates to levels comparable to a mastectomy. * **Margin Status:** For **DCIS (Ductal Carcinoma In Situ)**, a wider margin of **2 mm** is specifically recommended, whereas for invasive cancer, "no ink on tumor" is the standard.

Question 1

A distressing complication of radical mastectomy is:

Accepted Answer

Edema of the arm

Answer

Paralysis of the fifth finger of the hand

Answer

Loss of sensation of the medial side of the arm

Answer

Frequent skin infections of the hand on the affected side

Question 2

What is the most common organism isolated in breast abscess?

Accepted Answer

Staphylococcus aureus

Answer

Streptococcus

Answer

Klebsiella

Answer

E coli

Question 3

What forms the supero-lateral boundary of axillary dissection?

Accepted Answer

Axillary vein

Answer

Clavi-pectoral fascia

Answer

Brachial plexus

Answer

Axillary artery

Question 4

Cystosarcoma phyllodes is best treated by:

Accepted Answer

Simple mastectomy

Answer

Lumpectomy

Answer

Radiotherapy

Answer

Radical mastectomy

Question 5

Regarding breast cancer, all are true except?

Accepted Answer

Medullary cancer has the poorest prognosis.

Answer

It increases with increasing age.

Answer

Involvement of subdermal lymphatics carries a bad prognosis.

Answer

It has an increased incidence with estrogen exposure.

Question 6

Where are Rotter's lymph nodes located?

Accepted Answer

Interpectoral region

Answer

Infraclavicular region

Answer

Mediastinum

Answer

Supraclavicular region

Question 7

What is the first investigation to be done in a lactating woman with a painful breast?

Accepted Answer

Ultrasound (USG)

Answer

Mammography

Answer

CT scan

Answer

MRI

Question 8

All of the following conditions are associated with an increased risk of breast cancer, except?

Accepted Answer

Hereditary nonpolyposis colorectal cancer (HNPCC)

Answer

Peutz-Jeghers syndrome

Answer

Cowden syndrome

Answer

BRCA 1 mutation

Question 9

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

Accepted Answer

Mammography

Answer

Fine needle aspiration cytology (FNAC)

Answer

Ultrasound (USG)

Answer

Excision biopsy

Question 10

In breast conservative surgery, what is the typically healthy margin excised?

Accepted Answer

1 cm

Answer

2 cm

Answer

3 cm

Answer

5 cm

Breast Surgery — MCQs

Breast Surgery — MCQs

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