Breast Surgery Practice Questions

Q: A 50-year-old woman has a lumpectomy following mammographic discovery of a carcinoma of the breast. Which of the following is a well-known characteristic or association of breast cancer?

Positive family history. **Explanation:** **1. Why Positive Family History is Correct:** Family history is one of the most significant non-modifiable risk factors for breast cancer. Approximately 5–10% of breast cancers are hereditary, often linked to mutations in the **BRCA1 and BRCA2** genes. A woman with a first-degree relative (mother, sister, or daughter) diagnosed with breast cancer has roughly **double the risk** compared to the general population. The risk increases further if the relative was diagnosed pre-menopausally or if multiple relatives are affected. **2. Analysis of Incorrect Options:** * **A. Low-fat diet:** High dietary fat intake is traditionally associated with an increased risk of breast cancer (though data is mixed), whereas a low-fat diet is considered a protective or neutral factor. * **C. Excessive thinness:** In post-menopausal women (like the 50-year-old in this case), **obesity** is a major risk factor. Adipose tissue is the primary source of estrogen (via peripheral aromatization of androgens) after menopause; therefore, thinness is actually protective. * **D. Multiparity:** High parity (having many children) is a **protective factor**. Increased risk is associated with **nulliparity** or having the first full-term pregnancy after the age of 30, as these conditions increase the total lifetime exposure to cyclical estrogen. **3. NEET-PG High-Yield Pearls:** * **Most common site:** Upper Outer Quadrant (Tail of Spence). * **Risk Factors (The "Estrogen Window"):** Early menarche ( 55 years), and HRT increase risk due to prolonged estrogen exposure. * **BRCA Mutations:** BRCA1 (Chromosome 17) and BRCA2 (Chromosome 13). BRCA1 is more strongly associated with Triple Negative Breast Cancer (TNBC). * **Li-Fraumeni Syndrome:** Associated with p53 mutation; increases risk of breast cancer, sarcomas, and leukemia.

Q: A 50-year-old patient has recently undergone a mastectomy for a 2.5 cm multicentric breast cancer with three positive axillary lymph nodes (stage IIB). A metastatic survey is done, and is negative, and she receives adjuvant chemotherapy. What is the most common site for distant metastasis in this patient?

Bone. ### Explanation **Correct Option: B. Bone** In breast cancer, the most common site for distant (systemic) metastasis is the **bone**. This holds true across most molecular subtypes and stages. Approximately 70% of patients with advanced breast cancer will develop bone metastases. The mechanism involves the "seed and soil" hypothesis, where breast cancer cells have a high affinity for the bone marrow microenvironment. Bone metastases in breast cancer are typically **osteolytic**, though they can be mixed or osteoblastic (especially in certain subtypes). **Analysis of Incorrect Options:** * **A. Brain:** While breast cancer is a common cause of brain metastasis, it is significantly less frequent than bone, lung, or liver. Brain involvement is more commonly seen in HER2-positive and Triple-Negative Breast Cancer (TNBC) subtypes, usually occurring later in the disease course. * **C. Lung:** The lung is the second most common site for distant metastasis and is often the first site of metastasis in patients with TNBC. However, statistically, bone involvement remains more prevalent overall. * **D. Gastrointestinal tract:** Metastasis to the GI tract is rare. Interestingly, **Invasive Lobular Carcinoma (ILC)** has a unique predilection for spreading to the GI tract, peritoneum, and ovaries, but it is still less common than bone spread. **Clinical Pearls for NEET-PG:** * **Most common site of distant metastasis:** Bone. * **Most common visceral organ for metastasis:** Lung (followed by the liver). * **Most common site for Lobular Carcinoma:** Atypical sites like the GI tract, peritoneum, and retroperitoneum. * **Batson’s Plexus:** The valveless vertebral venous plexus explains why breast cancer frequently spreads to the axial skeleton (spine and pelvis) without passing through the lungs first. * **Bone Scan (Technetium-99m):** The most sensitive screening tool for detecting asymptomatic bone metastases.

Q: Incisional biopsy of a breast mass in a 35-year-old woman demonstrates a hypercellular fibroadenoma (Cystosarcoma phyllodes) at the time of frozen section. Appropriate management of this lesion could include?

Wide local excision with a rim of normal tissue. **Explanation:** Phyllodes tumor (Cystosarcoma phyllodes) is a fibroepithelial neoplasm that resembles a fibroadenoma but is characterized by a "leaf-like" growth pattern and high stromal cellularity. The management of these tumors depends on their biological behavior, which ranges from benign to malignant. **Why Option A is correct:** The standard of care for Phyllodes tumor, regardless of whether it is benign, borderline, or malignant, is **Wide Local Excision (WLE)** with a surgical margin of at least **1 cm**. This is because these tumors have a high propensity for local recurrence if the margins are involved. Unlike breast cancer, Phyllodes tumors are not truly invasive in a way that requires systemic clearance; they are locally aggressive. **Why other options are incorrect:** * **Option B:** Axillary lymphadenectomy is unnecessary because Phyllodes tumors are mesenchymal in origin and spread primarily via the **hematogenous route**, not the lymphatic system. Lymph node involvement is seen in less than 1% of cases. * **Option C:** Modified Radical Mastectomy (MRM) is overtreatment. Simple mastectomy is only indicated if the tumor is so large that a 1 cm margin cannot be achieved with breast-conserving surgery or for recurrent disease. * **Option D:** Radiotherapy is not the primary treatment. It may be considered for high-risk malignant Phyllodes or recurrent cases, but the definitive initial management is surgical excision. **NEET-PG High-Yield Pearls:** * **Age:** Typically occurs in women aged 35–50 (older than the typical fibroadenoma age). * **Clinical Feature:** Rapidly enlarging, painless, firm, mobile mass. * **Pathology:** Characterized by "leaf-like" stromal projections and increased stromal cellularity. * **Metastasis:** Most common site of distant metastasis is the **Lungs**. * **Treatment Summary:** WLE (1 cm margin) is the gold standard. No axillary dissection is needed.

Q: In Patey's mastectomy, which of the following steps is NOT performed?

Pectoralis major muscle is removed.. **Explanation:** The core concept in breast surgery for NEET-PG is distinguishing between the various types of mastectomies based on which structures are preserved. **1. Why Option C is the correct answer:** In **Patey’s Modified Radical Mastectomy (MRM)**, the **Pectoralis major muscle is preserved**. The defining feature of Patey’s technique is the **removal of the Pectoralis minor muscle** (or its retraction) to facilitate complete clearance of Level III axillary lymph nodes. Removing the Pectoralis major was a feature of the Halsted Radical Mastectomy, which is now obsolete due to significant morbidity and lack of survival benefit over MRM. **2. Analysis of Incorrect Options:** * **Option A (Nipple and areola):** In any form of Modified Radical Mastectomy (including Patey’s), the Nipple-Areola Complex (NAC) is removed along with the elliptical skin incision to ensure oncological safety. * **Option B (Surrounding normal tissue):** The procedure involves removing the entire breast disc (parenchyma) along with the tumor and a margin of normal tissue to ensure clear margins. * **Option D (Pectoralis minor):** This is a standard step in Patey’s version of MRM. By removing the Pectoralis minor, the surgeon gains access to the highest axillary nodes (Level III/Apical nodes). **Clinical Pearls for NEET-PG:** * **Auchincloss MRM:** Both Pectoralis major and minor are **preserved**. (Most common MRM today). * **Patey’s MRM:** Pectoralis major is preserved; Pectoralis minor is **removed**. * **Halsted Radical Mastectomy:** Both Pectoralis major and minor are **removed**. * **Scanlon’s MRM:** Pectoralis major is preserved; Pectoralis minor is **transected and repaired** (to access Level III nodes). * **Nerves at risk:** Long thoracic nerve (Serratus anterior - Winging of scapula) and Thoracodorsal nerve (Latissimus dorsi).

Q: Which of the following statements about phyllodes tumor is false?

Always malignant. **Explanation:** Phyllodes tumor (Cystosarcoma Phyllodes) is a fibroepithelial tumor of the breast characterized by a "leaf-like" appearance on histology. **1. Why Option A is False (The Correct Answer):** Phyllodes tumors are **not always malignant**. They are classified by the WHO into three categories based on histological features (stromal cellularity, atypia, mitotic rate, and border infiltration): * **Benign (60-75%):** The most common type. * **Borderline:** Intermediate features. * **Malignant (approx. 10-20%):** Capable of hematogenous metastasis (most commonly to the lungs). **2. Why the other options are True:** * **Option B (Grows rapidly):** These tumors are known for their characteristic rapid increase in size, often presenting as a large, painless, mobile mass that can cause pressure necrosis of the overlying skin. * **Option C (Unilateral):** They are almost always unilateral and solitary. Bilateral involvement is extremely rare. * **Option D (Excision is the treatment):** The standard treatment is **Wide Local Excision** with at least a **1 cm margin**. Simple mastectomy is reserved only for very large tumors where a 1 cm margin cannot be achieved with breast conservation. Axillary lymph node dissection is generally not required as these tumors spread hematogenously, not via lymphatics. **High-Yield Clinical Pearls for NEET-PG:** * **Age:** Typically occurs in women aged 40–50 (older than the typical fibroadenoma age group). * **Histology:** Characterized by increased stromal cellularity compared to fibroadenoma. * **Imaging:** Hard to distinguish from fibroadenoma on USG/Mammography; diagnosis often requires Core Needle Biopsy. * **Recurrence:** They have a high tendency for local recurrence if margins are inadequate.

Q: A 65-year-old female, who underwent a right radical mastectomy 10 years ago, now presents with multiple subcutaneous nodules in her right upper limb. What is the most probable diagnosis?

Lymphangiosarcoma. ### Explanation **Correct Answer: A. Lymphangiosarcoma** The clinical scenario describes **Stewart-Treves Syndrome**, a rare but classic complication of chronic lymphedema. **Why it is correct:** Lymphangiosarcoma is a malignant tumor of the lymphatic vessels. It typically occurs in patients who have undergone a **Radical Mastectomy** (which involves axillary lymph node dissection) followed by chronic, long-standing lymphedema of the ipsilateral arm. The latency period is usually long, typically **10 years or more** after the initial surgery. Clinically, it presents as multiple bluish-red subcutaneous nodules or plaques that may ulcerate. **Why incorrect options are wrong:** * **B. Multiple lipomas:** These are benign fatty tumors. While they are common subcutaneous nodules, they are not associated with post-mastectomy lymphedema or the specific timeline/location described. * **C. Varicosities:** These are dilated, tortuous veins. While lymphedema involves fluid stasis, it does not typically present as "multiple subcutaneous nodules" in the upper limb following cancer surgery. **NEET-PG High-Yield Pearls:** * **Stewart-Treves Syndrome:** Defined as lymphangiosarcoma arising in a limb with chronic lymphedema (most commonly post-mastectomy). * **Latency:** Usually develops **10–15 years** after surgery. * **Clinical Presentation:** Look for "bruise-like" patches or "purple-red nodules" on a swollen arm. * **Prognosis:** Extremely poor due to early hematogenous spread (often to the lungs). * **Treatment:** Aggressive surgical resection or limb amputation is often required, though palliative care is common due to late presentation.

Q: All of the following regarding cystosarcoma phyllodes are true EXCEPT:

It arises from a single epithelial cell type.. **Explanation:** **Phyllodes Tumor (Cystosarcoma Phyllodes)** is a rare fibroepithelial breast tumor. The correct answer is **C** because Phyllodes tumors are **biphasic tumors**, meaning they arise from both **epithelial and stromal (mesenchymal)** components. In contrast to fibroadenomas, the stroma in Phyllodes is hypercellular and is the component that determines the malignant potential. **Analysis of Options:** * **Option A (True):** Grossly, the tumor exhibits a "leaf-like" appearance (Phyllon = leaf) due to the overgrowth of stroma projecting into the ductal spaces, creating clefts and slits on the cut surface. * **Option B (True):** For malignant Phyllodes, **Simple Mastectomy** is often the preferred treatment, especially if the tumor is large or if clear margins (at least 1 cm) cannot be achieved with breast-conserving surgery. * **Option D (True):** FNAC and Core Needle Biopsy often fail to differentiate Phyllodes from a cellular fibroadenoma. Therefore, **Excision Biopsy** (Wide Local Excision) is the gold standard for definitive diagnosis and treatment of benign variants. **High-Yield Clinical Pearls for NEET-PG:** * **Age Group:** Typically occurs in women aged 40–50 years (older than the typical fibroadenoma age). * **Metastasis:** Unlike breast cancer, malignant Phyllodes spreads via the **hematogenous route** (most commonly to the lungs). Axillary lymph node involvement is rare (<5%), so routine lymph node dissection is not required. * **Treatment Rule:** Wide Local Excision with a **1 cm margin** is the standard. If the tumor-to-breast ratio is high, mastectomy is performed. * **Grading:** Classified by the WHO into Benign, Borderline, and Malignant based on stromal cellularity, atypia, and mitotic count.

Question 1

A 50-year-old woman has a lumpectomy following mammographic discovery of a carcinoma of the breast. Which of the following is a well-known characteristic or association of breast cancer?

Accepted Answer

Positive family history

Answer

Low-fat diet

Answer

Excessive thinness

Answer

Multiparity

Question 2

A 50-year-old patient has recently undergone a mastectomy for a 2.5 cm multicentric breast cancer with three positive axillary lymph nodes (stage IIB). A metastatic survey is done, and is negative, and she receives adjuvant chemotherapy. What is the most common site for distant metastasis in this patient?

Accepted Answer

Bone

Answer

Brain

Answer

Lung

Answer

Gastrointestinal tract

Question 3

Incisional biopsy of a breast mass in a 35-year-old woman demonstrates a hypercellular fibroadenoma (Cystosarcoma phyllodes) at the time of frozen section. Appropriate management of this lesion could include?

Accepted Answer

Wide local excision with a rim of normal tissue

Answer

Lumpectomy and axillary lymphadenectomy

Answer

Modified radical mastectomy

Answer

Excision and postoperative radiotherapy

Question 4

In Patey's mastectomy, which of the following steps is NOT performed?

Accepted Answer

Pectoralis major muscle is removed.

Answer

Nipple and areola are removed.

Answer

Surrounding normal tissue of the tumor is removed.

Answer

Pectoralis minor muscle is removed.

Question 5

A 53-year-old woman discovers a lump in her breast. Physical examination confirms a mass in the lower, outer quadrant of the left breast. Mammography demonstrates an ill-defined, stellate density measuring 1 cm. Needle aspiration reveals malignant ductal epithelial cells. A modified radical mastectomy is performed. The surgical specimen reveals a firm irregular mass. Which of the following cellular markers would be the most useful to evaluate before considering therapeutic options for this patient?

Accepted Answer

Estrogen receptors

Answer

Collagenase

Answer

Galactosyltransferase

Answer

Lysosomal acid hydrolases

Question 6

Which of the following statements about phyllodes tumor is false?

Accepted Answer

Always malignant

Answer

Grows rapidly

Answer

Unilateral

Answer

Excision is the treatment

Question 7

A 65-year-old female, who underwent a right radical mastectomy 10 years ago, now presents with multiple subcutaneous nodules in her right upper limb. What is the most probable diagnosis?

Accepted Answer

Lymphangiosarcoma

Answer

Multiple lipomas

Answer

Varicosities

Answer

None of the above

Question 8

All of the following regarding cystosarcoma phyllodes are true EXCEPT:

Accepted Answer

It arises from a single epithelial cell type.

Answer

The cut surface appears leaf-like.

Answer

Mastectomy is the preferred treatment for malignant tumors.

Answer

Excision biopsy is used for diagnosis in benign tumors.

Question 9

Arrange the incidence of various types of breast cancers in increasing order.

Accepted Answer

BRCA1

Answer

PTEN (Cowden disease)

Answer

Sporadic breast cancer

Answer

Hereditary breast cancer

Question 10

What is the treatment for hormone-dependent fungating carcinoma of the breast with lung secondaries in a 30-year-old female patient?

Accepted Answer

Simple mastectomy followed by oophorectomy

Answer

Radical mastectomy followed by oophorectomy

Answer

Adrenalectomy

Answer

Lumpectomy followed by castration

Breast Surgery — MCQs

Breast Surgery — MCQs

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