Breast Surgery Practice Questions

Q: Which of the following statements regarding Paget's disease of the breast is true, except?

None of the above. **Explanation:** Paget’s disease of the breast is a rare manifestation of breast cancer characterized by the infiltration of the epidermis by malignant cells (Paget cells). The question asks for the "false" statement, but since all options (A, B, and C) are clinically accurate, the correct answer is **"None of the above."** **1. Why the options are correct:** * **Option B (Represents underlying malignancy):** This is a hallmark of the disease. In over 95% of cases, Paget’s disease is associated with an underlying **Ductal Carcinoma In Situ (DCIS)** or invasive carcinoma. The Paget cells migrate from the underlying lactiferous ducts to the nipple skin. * **Option C (Presents as eczema):** The classic clinical presentation is a chronic, crusting, scaling, or eroding lesion of the nipple-areola complex that mimics **eczema**. A key differentiating factor is that Paget’s typically involves the **nipple first** and may spread to the areola, whereas cutaneous eczema usually involves the areola and spares the nipple. * **Option A (Treated by simple mastectomy):** While Breast Conserving Surgery (BCS) followed by radiotherapy is an option for localized disease, **Simple Mastectomy** (with or without axillary evaluation) remains a standard and definitive surgical treatment, especially when the underlying malignancy is multicentric. **High-Yield Clinical Pearls for NEET-PG:** * **Pathology:** Paget cells are large, pale cells with granular cytoplasm and pleomorphic nuclei. They are **PAS positive** (diastase resistant) and stain positive for **Her2/neu** and **CK7**. * **Diagnosis:** The gold standard for diagnosis is a **full-thickness punch biopsy** of the nipple-areola complex. * **Prognosis:** The prognosis depends entirely on the stage and characteristics of the underlying breast cancer, not the skin changes themselves.

Q: Unilateral breast involvement with scaly skin around the nipple and intermittent bleeding is suggestive of:

Paget's disease. **Explanation:** The clinical presentation of unilateral, scaly, or eczematous lesions of the nipple-areola complex, especially when associated with intermittent bleeding or ulceration, is a classic hallmark of **Paget’s disease of the breast**. **1. Why Paget’s Disease is Correct:** Paget’s disease is an intraepidermal manifestation of an underlying breast malignancy (usually Ductal Carcinoma In Situ or invasive ductal carcinoma). Malignant "Paget cells" migrate from the lactiferous ducts into the epidermis of the nipple. Key diagnostic features include: * **Unilateral involvement** (unlike constitutional eczema). * **Destruction of the nipple-areola complex** (starts at the nipple and spreads to the areola). * **Palpable mass** present in approximately 50% of cases. **2. Why Other Options are Incorrect:** * **Eczema:** Typically **bilateral**, involves the areola first (sparing the nipple), and presents with intense pruritus without destruction of the nipple architecture. It responds to topical steroids, whereas Paget’s does not. * **Galactocoele:** A milk-containing cyst occurring in lactating women. It presents as a painless, fluctuant mass rather than a surface skin lesion. * **Sebaceous Cysts:** These are common cutaneous lumps that may occur on the breast skin but do not cause diffuse scaling or bleeding of the nipple-areola complex. **Clinical Pearls for NEET-PG:** * **Pathology:** Look for **Paget cells** (large, PAS-positive, pale-staining cells with prominent nucleoli) on skin biopsy. * **Management:** Mammography is mandatory to locate the underlying malignancy. * **Rule of Thumb:** Any "eczema" of the nipple that does not heal with topical treatment within 2–3 weeks must be biopsied to rule out Paget’s disease.

Q: What is the most common site of metastasis for breast carcinoma?

Lumbar vertebra. **Explanation:** Breast carcinoma is known for its predilection for hematogenous spread to the skeletal system. Bone is the most common site of distant metastasis, occurring in approximately 70% of patients with advanced disease. **Why Lumbar Vertebra is Correct:** The primary route for spinal metastasis in breast cancer is the **Batson’s venous plexus** (a valveless vertebral venous system). This plexus connects the deep pelvic veins and thoracic veins directly to the internal vertebral venous plexus without passing through the lungs or the portal system. Due to the effects of gravity and intra-abdominal pressure, the **Lumbar vertebrae** are the most frequently involved segment of the spine, followed by the thoracic vertebrae. **Analysis of Incorrect Options:** * **Thoracic vertebra (A):** While the thoracic spine is the second most common site of spinal metastasis, it is statistically less frequent than the lumbar region. * **Pelvis (B):** The pelvis is a common site for bony metastasis, but it ranks lower in frequency compared to the axial skeleton (spine). * **Femur (C):** The femur is the most common site for metastasis in the **appendicular skeleton**, but overall, it is less common than spinal involvement. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of distant metastasis:** Bone (specifically the Lumbar spine). * **Most common organ for metastasis:** Lungs (followed by Liver). * **Nature of lesions:** Breast cancer bone metastases are typically **osteolytic**, though they can be osteoblastic (especially in certain subtypes). * **Batson’s Plexus:** This is the key anatomical structure explaining why breast, prostate, and thyroid cancers frequently metastasize to the spine while bypassing the caval system.

Q: BRCA-1 positive women have what percentage increased risk of breast carcinoma?

60%. **Explanation:** The correct answer is **60% (Option D)**. BRCA1 and BRCA2 are tumor suppressor genes involved in DNA repair via homologous recombination. Mutations in these genes significantly elevate the lifetime risk of developing breast and ovarian cancers compared to the general population (whose lifetime risk is approximately 12%). * **BRCA1:** Carries a lifetime breast cancer risk of approximately **60% to 80%**. It is also associated with a 40% risk of ovarian cancer and a higher prevalence of "Triple Negative" (ER/PR/HER2 negative) breast cancers. * **BRCA2:** Carries a slightly lower lifetime breast cancer risk of approximately **45% to 55%** and an ovarian cancer risk of about 20%. It is more commonly associated with male breast cancer. **Analysis of Incorrect Options:** * **Options A & B (10-20%):** These percentages are too low. While 10% of all breast cancers are hereditary, the individual risk for a mutation carrier is much higher. * **Option C (40%):** This is closer to the risk associated with BRCA2 or the ovarian cancer risk for BRCA1, but underestimates the penetrance for breast carcinoma in BRCA1 carriers. **High-Yield Clinical Pearls for NEET-PG:** 1. **Surveillance:** For BRCA-positive women, annual screening with **Contrast-Enhanced MRI** (starting at age 25) and Mammography (starting at age 30) is recommended. 2. **Prophylaxis:** Bilateral Salpingo-oophorectomy (BSO) reduces the risk of ovarian cancer by 90% and breast cancer by 50% if performed pre-menopausally. 3. **Molecular Subtype:** BRCA1 is most frequently associated with **Medullary Carcinoma** and Basal-like (Triple Negative) subtypes. 4. **Treatment:** **PARP inhibitors** (e.g., Olaparib) are specifically effective in BRCA-mutated cancers due to "synthetic lethality."

Q: Phyllodes tumor most commonly presents in which decade of life?

Sixth decade. **Explanation:** **Phyllodes Tumor (Cystosarcoma Phyllodes)** is a rare fibroepithelial breast tumor. The correct answer is the **sixth decade (50s)** because, unlike fibroadenomas which occur in younger women, Phyllodes tumors typically present in an older age group. The peak incidence is between **45 and 55 years**. * **Why Option D is Correct:** Large-scale clinical studies and standard textbooks (like Bailey & Love) indicate that the median age of presentation is approximately 45–50 years. While it can occur at any age, the "sixth decade" represents the peak statistical frequency. * **Why Options A, B, and C are Incorrect:** * **Second and Third Decades (10s–20s):** This is the classic age group for **Fibroadenomas**. While "Juvenile Phyllodes" exists, it is extremely rare. * **Fourth Decade (30s):** This is a transitional period where benign breast diseases are common, but the incidence of Phyllodes is still lower than in the perimenopausal period. **High-Yield Clinical Pearls for NEET-PG:** 1. **Origin:** It arises from the **periductal stromal cells**, not the ducts themselves. 2. **Clinical Feature:** Presents as a large, painless, mobile mass with **stretched, shiny skin** and prominent superficial veins. It shows rapid growth. 3. **Pathology:** Characterized by a **"leaf-like"** appearance on histology (Phyllon = leaf). 4. **Classification:** Can be Benign, Borderline, or Malignant based on stromal cellularity, atypia, and mitotic index. 5. **Management:** Wide local excision with a **1 cm margin** is the gold standard. Lymphadenectomy is not routine as it spreads via the hematogenous route (like a sarcoma), not lymphatics.

Question 1

Which of the following pathologic findings is the strongest contraindication to breast preservation (lumpectomy with breast radiation) as primary treatment for a newly diagnosed breast cancer?

Accepted Answer

Positive surgical margin for invasive cancer

Answer

Grade 3, poorly differentiated, infiltrating ductal carcinoma

Answer

Extensive intraductal cancer around the invasive lesion

Answer

Tumor size less than 3 cm

Question 2

Which of the following statements regarding Paget's disease of the breast is true, except?

Accepted Answer

None of the above

Answer

Treated by simple mastectomy

Answer

Represents underlying malignancy

Answer

Presents as eczema

Question 3

Unilateral breast involvement with scaly skin around the nipple and intermittent bleeding is suggestive of:

Accepted Answer

Paget's disease

Answer

Galactocoele

Answer

Eczema

Answer

Sebaceous cysts

Question 4

Which of the following statements is FALSE regarding breast cancer during pregnancy?

Accepted Answer

Mammography has reduced sensitivity during pregnancy.

Answer

Axillary lymph node metastases are present in 75% of affected women.

Answer

Radiation therapy cannot be considered for treatment during pregnancy.

Answer

Less than 25% of breast nodules discovered are cancerous.

Question 5

A patient presents with carcinoma in the upper outer quadrant of the breast. Which of the following lymph node groups is LEAST likely to be a site of metastasis?

Accepted Answer

Parasternal nodes

Answer

Anterior axillary nodes

Answer

Central axillary nodes

Answer

Lateral axillary nodes

Question 6

Fibrocystic disease of the breast has been associated with elevated blood levels of which hormone?

Accepted Answer

Estrogen

Answer

Testosterone

Answer

Progesterone

Answer

Luteinizing hormone

Question 7

A 45-year-old lady presents with a lump in her right breast. The lump is 4 cm in diameter with evidence of cutaneous edema (peau d'orange), not fixed to the pectoralis major muscle. The axillary lymph nodes are not enlarged. What is the status of T in the TNM classification?

Accepted Answer

T4: tumor of any size with direct extension to chest wall or skin

Answer

T1: tumor ≤ 2 cm in greatest dimension

Answer

T2: tumor > 2 cm but ≤ 5 cm in greatest dimension

Answer

T3: tumor > 5 cm in greatest dimension

Question 8

What is the most common site of metastasis for breast carcinoma?

Accepted Answer

Lumbar vertebra

Answer

Thoracic vertebra

Answer

Pelvis

Answer

Femur

Question 9

BRCA-1 positive women have what percentage increased risk of breast carcinoma?

Accepted Answer

60%

Answer

10%

Answer

20%

Answer

40%

Question 10

Phyllodes tumor most commonly presents in which decade of life?

Accepted Answer

Sixth decade

Answer

Second decade

Answer

Third decade

Answer

Fourth decade

Breast Surgery — MCQs

Breast Surgery — MCQs

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