USMLE Step 2 Quiz: Surgical Oncology And Breast Disease

What this quiz covers

This quiz focuses on Surgical Oncology And Breast Disease, giving you a quick way to practice the rules, question types, and explanations that matter most for USMLE Step 2.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. Diagnostic mammography with targeted ultrasound of the palpable region (correct answer)
2. Breast MRI as the sole initial test due to dense breast tissue
3. Whole-body PET/CT to evaluate for occult primary and metastases
4. Therapeutic lumpectomy without imaging to avoid diagnostic delays
5. Repeat clinical breast exam after next menstrual cycle before imaging

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest a palpable mass in a woman with dense breasts requiring initial evaluation, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending diagnostic mammography with targeted ultrasound as first-line for palpable masses in women ≥40. Choice B is incorrect because it represents misuse of MRI as initial test, which often arises from overestimating its role in routine diagnostics. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 2

1. Targeted breast ultrasound of the palpable area (correct answer)
2. CT chest with contrast to evaluate for metastatic disease
3. Breast MRI with gadolinium as the first-line pregnancy test
4. Delay all imaging until after delivery unless severe pain develops
5. Technetium bone scan to screen for skeletal metastases

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest a palpable mass during pregnancy requiring safe evaluation, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending targeted ultrasound as the initial test in pregnancy to avoid fetal radiation exposure. Choice C is incorrect because it represents inappropriate use of contrast agents, which often arises from ignoring pregnancy-specific safety concerns. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 3

1. Paget disease of the breast associated with underlying ductal carcinoma (correct answer)
2. Contact dermatitis requiring stronger topical corticosteroids only
3. Duct ectasia managed with warm compresses and reassurance
4. Inflammatory breast cancer without need for tissue diagnosis
5. Fibrocystic change requiring no imaging if symptoms are chronic

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest Paget disease with underlying carcinoma confirmed by biopsy, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending evaluation for associated DCIS or invasive disease requiring surgical management. Choice B is incorrect because it represents undertreatment with topical therapy, which often arises from confusing malignant with benign dermatologic conditions. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 4

1. Lumpectomy with negative margins followed by whole-breast radiation therapy (correct answer)
2. Observation only because DCIS cannot progress to invasive cancer
3. Neoadjuvant chemotherapy to shrink DCIS before surgery
4. Routine axillary lymph node dissection at time of lumpectomy
5. Radical mastectomy with pectoralis removal to prevent recurrence

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest small, non-invasive DCIS suitable for breast conservation, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending lumpectomy with negative margins followed by radiation to reduce recurrence. Choice D is incorrect because it represents unnecessary nodal surgery, which often arises from overgeneralizing invasive cancer protocols to DCIS. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 5

1. Obtain imaging for suspected bone metastases, such as bone scan or PET/CT (correct answer)
2. Reassure and treat as musculoskeletal strain without further workup
3. Schedule prophylactic mastectomy to prevent metastatic progression
4. Start empiric antibiotics for presumed vertebral osteomyelitis
5. Repeat screening mammography only, as it detects most recurrences

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest possible bone metastases with elevated alkaline phosphatase years post-treatment, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending bone scan or PET/CT for symptomatic evaluation in suspected recurrence. Choice B is incorrect because it represents diagnostic omission, which often arises from attributing symptoms to benign causes without investigation. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 6

1. Refer for genetic counseling and germline testing to guide surgical risk-reduction decisions (correct answer)
2. Avoid genetic testing because it does not change breast cancer treatment
3. Proceed directly to radical mastectomy regardless of genetic results
4. Order CA-125 screening only, then decide on breast surgery
5. Recommend observation because family history suggests benign disease

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest early-onset breast cancer with strong family history warranting genetic evaluation, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending genetic counseling and testing to inform risk-reduction strategies like bilateral mastectomy in carriers. Choice B is incorrect because it represents underutilization of genetics, which often arises from underestimating its impact on surgical decisions. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 7

1. Neoadjuvant chemotherapy with HER2-targeted therapy followed by definitive breast surgery (correct answer)
2. Tamoxifen monotherapy as primary treatment because surgery is high risk
3. Immediate mastectomy without systemic therapy because HER2 disease is localized
4. Observation and repeat biopsy in 6 months to confirm receptor status
5. Radiation alone to the breast and axilla as definitive curative treatment

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest locally advanced HER2-positive breast cancer suitable for neoadjuvant therapy, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending neoadjuvant chemotherapy with HER2-targeted agents to downstage disease before surgery. Choice C is incorrect because it represents incorrect sequencing, which often arises from underestimating systemic therapy's role in HER2-positive disease. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 8

1. Plan adjuvant endocrine therapy after surgery due to ER-positive tumor biology (correct answer)
2. Avoid endocrine therapy because surgery alone cures all ER-positive cancers
3. Use trastuzumab because ER positivity predicts HER2-targeted benefit
4. Recommend antibiotics first to assess if the mass resolves
5. Defer all adjuvant therapy until routine surveillance imaging shows recurrence

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest ER-positive invasive carcinoma in a postmenopausal woman planning surgery, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending adjuvant endocrine therapy post-surgery to reduce recurrence based on receptor status. Choice B is incorrect because it represents undertreatment, which often arises from misconceptions that surgery alone is curative regardless of biology. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 9

1. Inflammatory breast cancer requiring neoadjuvant therapy and multimodal treatment (correct answer)
2. Acute bacterial mastitis requiring broader-spectrum antibiotics and drainage
3. Fat necrosis after trauma requiring reassurance only
4. Paget disease limited to the nipple-areolar complex without invasion
5. Fibroadenoma with reactive skin changes from hormonal cycling

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest inflammatory breast cancer with failed antibiotic response and biopsy confirmation, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending neoadjuvant therapy followed by mastectomy and radiation for this aggressive subtype. Choice B is incorrect because it represents diagnostic delay, which often arises from misattributing symptoms to infection despite lack of improvement. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 10

1. Lumpectomy alone without radiation because margins can be negative
2. Neoadjuvant chemotherapy followed by surgery with appropriate axillary staging (correct answer)
3. Tamoxifen therapy as primary treatment given high recurrence risk
4. Immediate radical mastectomy with routine removal of pectoralis muscles
5. Observation with imaging every 6 months because CT shows no metastases

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest locally advanced triple-negative breast cancer without metastases, which is key to determining the appropriate management step. The correct answer, choice B, is correct because it aligns with guidelines recommending neoadjuvant chemotherapy for stage II–III triple-negative disease to downstage the tumor and assess response before surgery. Choice A is incorrect because it represents undertreatment by omitting radiation, which often arises from misconceptions about margin status eliminating recurrence risk. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 11

1. Annual mammography plus adjuvant whole-breast radiation and endocrine therapy (correct answer)
2. PET/CT every 6 months for 2 years to detect early metastasis
3. No radiation needed if margins are negative after lumpectomy
4. Tumor marker monitoring monthly with CA 15-3 to detect recurrence
5. Prophylactic contralateral mastectomy as standard follow-up for all patients

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest early-stage ER-positive breast cancer post-lumpectomy with negative nodes, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending annual mammography, whole-breast radiation, and endocrine therapy for surveillance and risk reduction. Choice B is incorrect because it represents overuse of advanced imaging, which often arises from anxiety-driven misconceptions about detecting asymptomatic metastases. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 12

1. Annual mammography and regular clinical visits; avoid routine systemic imaging if asymptomatic (correct answer)
2. PET/CT every 6 months indefinitely to detect microscopic recurrence
3. Monthly CA 15-3 levels and CT chest/abdomen annually for 10 years
4. No follow-up needed after 2 years if physical exam is normal
5. Breast MRI every 3 months regardless of risk factors or symptoms

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest asymptomatic status years post-treatment for early-stage breast cancer, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending annual mammography and clinical visits without routine advanced imaging to avoid unnecessary tests. Choice B is incorrect because it represents overuse of surveillance, which often arises from fear of missing recurrence despite lack of survival benefit. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 13

1. Perform sentinel lymph node biopsy; if negative, omit further axillary surgery (correct answer)
2. Perform routine axillary lymph node dissection for all invasive cancers
3. Avoid any nodal staging because tumor size is under 3 cm
4. Use PET/CT instead of surgical nodal staging to reduce complications
5. Biopsy contralateral axillary nodes to exclude occult bilateral spread

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest clinically node-negative invasive carcinoma requiring axillary staging, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending sentinel lymph node biopsy, omitting further surgery if negative to minimize morbidity. Choice B is incorrect because it represents overtreatment with routine dissection, which often arises from outdated practices predating sentinel node techniques. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 14

1. Omit completion axillary dissection and proceed with planned adjuvant radiation therapy (correct answer)
2. Perform immediate completion axillary dissection for any positive sentinel node
3. Cancel radiation because nodal involvement makes it ineffective
4. Repeat sentinel node biopsy in 3 months to confirm nodal status
5. Start antibiotics for presumed reactive lymphadenitis and delay oncology care

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest limited sentinel node positivity in a patient receiving lumpectomy and radiation, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending omission of completion axillary dissection in select cases to reduce lymphedema risk. Choice B is incorrect because it represents overtreatment with dissection, which often arises from not applying modern trial data like Z0011. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 15

1. Postmastectomy chest wall and regional nodal radiation plus adjuvant systemic therapy (correct answer)
2. No radiation after mastectomy because margins are negative
3. Routine PET/CT surveillance every 3 months instead of radiation therapy
4. Axillary re-dissection to remove any remaining microscopic disease
5. Observation only because endocrine therapy replaces radiation in all cases

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest high-risk features post-mastectomy with multiple positive nodes, which is key to determining the appropriate management step. The correct answer, choice A, is correct because it aligns with guidelines recommending postmastectomy radiation to chest wall and nodes plus adjuvant systemic therapy to reduce recurrence. Choice B is incorrect because it represents undertreatment by omitting radiation, which often arises from overemphasizing negative margins alone. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 16

1. Breast MRI with and without contrast for initial lesion characterization
2. Diagnostic mammography of both breasts with targeted right breast ultrasound (correct answer)
3. PET/CT to evaluate for distant metastases before biopsy
4. Repeat screening mammography in 6 months to assess interval change
5. Empiric antibiotics and reassessment in 1 week for presumed mastitis

Explanation: This question tests USMLE Step 2 CK skills in surgical oncology and breast disease management, focusing on evidence-based clinical decision-making. Understanding breast cancer management involves recognizing appropriate diagnostic and treatment strategies based on patient presentation and current guidelines. In this scenario, the patient's clinical findings and test results suggest a suspicious palpable mass with high malignancy risk due to family history and exam features, which is key to determining the appropriate management step. The correct answer, choice B, is correct because it aligns with guidelines recommending diagnostic mammography with targeted ultrasound for women ≥40 with palpable masses to characterize the lesion and guide biopsy. Choice A is incorrect because it represents an inappropriate initial imaging choice, which often arises from overreliance on advanced modalities without following stepwise evaluation protocols. To effectively manage breast disease cases, students should stay updated on guidelines, understand risk stratification, and practice integrating clinical findings with management planning.

Question 17

1. Schedule whole-breast external-beam radiation therapy followed by endocrine treatment (correct answer)
2. Begin adjuvant cyclophosphamide, doxorubicin, and paclitaxel chemotherapy immediately
3. Observe without additional local or systemic therapy because the nodes are negative
4. Proceed to completion mastectomy to eliminate the need for radiation

Explanation: When you encounter early-stage breast cancer questions on Step 2, focus on the breast conservation pathway and understand that successful lumpectomy with clear margins requires adjuvant radiation to achieve outcomes equivalent to mastectomy. This patient has early-stage invasive ductal carcinoma (T1c, N0, M0) with hormone receptor-positive, HER2-negative disease. She's an ideal candidate for breast-conserving therapy since she has a small tumor relative to breast size, clear surgical margins, negative nodes, and desires breast preservation. The standard of care after successful lumpectomy is whole-breast radiation therapy followed by endocrine therapy (tamoxifen or an aromatase inhibitor) for her hormone receptor-positive disease. This approach provides local control equivalent to mastectomy while preserving the breast. Choice B is incorrect because chemotherapy isn't typically indicated for small, node-negative, hormone receptor-positive tumors unless high-risk features are present or genomic testing suggests benefit. Choice C fails because observation alone after lumpectomy leads to unacceptably high local recurrence rates (around 30-40% at 10 years without radiation). Choice D represents overtreatment since breast conservation with radiation achieves equivalent survival outcomes to mastectomy for early-stage disease. Key Step 2 strategy: Remember the breast conservation trinity - appropriate candidate selection, negative surgical margins, and adjuvant radiation therapy. When all three elements are present, breast-conserving therapy is preferred over mastectomy. Always consider the patient's preferences when equivalent treatment options exist, but don't compromise oncologic principles.

Question 18

1. Initiate neoadjuvant multi-agent chemotherapy before surgical resection (correct answer)
2. Perform modified radical mastectomy with immediate reconstruction
3. Proceed directly to wide local excision (lumpectomy) with sentinel node sampling
4. Offer preoperative endocrine therapy to shrink the tumor volume

Explanation: When you encounter locally advanced breast cancer (T3/T4 tumors), the key decision point is whether neoadjuvant therapy can downstage the tumor to allow for better surgical outcomes and breast conservation. This patient has a 5-cm mass fixed to the pectoralis muscle, making it at least T4a (locally advanced). The triple-negative histology is actually favorable for neoadjuvant chemotherapy, as these tumors are typically chemosensitive and can achieve significant pathologic responses. Since she desires breast conservation, neoadjuvant multi-agent chemotherapy (option A) is the most appropriate first step to potentially shrink the tumor and convert an inoperable or marginally operable case into one amenable to breast-conserving surgery. Option B (modified radical mastectomy) ignores the patient's preference for breast conservation and doesn't address the locally advanced nature that may benefit from systemic therapy first. Option C (immediate lumpectomy) is inappropriate because the 5-cm tumor fixed to muscle would likely have positive margins and poor cosmetic outcomes without downstaging. Option D (endocrine therapy) is incorrect because this is triple-negative breast cancer, meaning it lacks estrogen and progesterone receptors, making it unresponsive to hormonal manipulation. Remember this pattern: For locally advanced breast cancer where the patient desires breast conservation, neoadjuvant chemotherapy is often the bridge between an initially unresectable/poor surgical candidate and successful breast-conserving therapy. Triple-negative tumors respond particularly well to neoadjuvant chemotherapy, making this approach even more compelling.

Question 19

1. Whole-breast radiation after lumpectomy (correct answer)
2. Six cycles of adjuvant anthracycline-based chemotherapy
3. Five years of aromatase inhibitor monotherapy
4. No additional therapy because DCIS is noninvasive

Explanation: When you encounter high-grade DCIS treated with lumpectomy, think about local recurrence prevention. DCIS is a pre-invasive lesion confined to breast ducts, but it has significant potential for local recurrence, which can be either DCIS again or invasive cancer. A) Whole-breast radiation is correct because multiple randomized trials (NSABP B-17, EORTC 10853) have consistently shown that radiation therapy after lumpectomy reduces ipsilateral breast recurrence by approximately 50-60% in DCIS patients. This benefit applies to both DCIS recurrence and progression to invasive cancer. Radiation addresses microscopic disease that may remain in the breast despite clear margins. B) Anthracycline-based chemotherapy is used for invasive breast cancer with high recurrence risk, but DCIS hasn't invaded beyond the basement membrane. Chemotherapy targets systemic micrometastases, which don't exist in pure DCIS, making this inappropriate and unnecessarily toxic. C) Aromatase inhibitor monotherapy isn't standard for DCIS. While tamoxifen has shown modest benefit in hormone receptor-positive DCIS, aromatase inhibitors alone aren't the primary adjuvant therapy and don't address the full spectrum of DCIS biology as effectively as radiation. D) No additional therapy ignores substantial evidence that DCIS recurrence rates are unacceptably high (15-20% at 10 years) without radiation, and roughly half of recurrences are invasive cancer. Study tip: For DCIS management questions, remember that radiation after lumpectomy is the gold standard for reducing local recurrence. The key distinction is local control (radiation) versus systemic therapy (chemotherapy/hormones), which isn't needed for non-invasive disease.

Question 20

1. Total (simple) mastectomy with sentinel lymph node biopsy (correct answer)
2. Wide local excision with whole-breast radiation similar to female breast conservation
3. Radical mastectomy removing pectoralis major and minor muscles en bloc
4. Excision of the mass only because male breasts lack significant residual tissue

Explanation: When you encounter male breast cancer on the USMLE Step 2, remember that while rare (accounting for <1% of all breast cancers), the surgical principles largely mirror female breast cancer treatment, with one crucial difference: breast conservation is rarely feasible due to limited breast tissue. Total mastectomy with sentinel lymph node biopsy (Answer A) is correct because men have minimal breast tissue, making it nearly impossible to achieve adequate margins while preserving cosmetically acceptable tissue. The 1.8-cm subareolar mass would require removing most or all of the breast tissue anyway. Sentinel lymph node biopsy is the standard staging procedure for clinically node-negative breast cancer, regardless of gender. Answer B (wide local excision with radiation) represents the standard breast-conserving approach used in women, but this is impractical in men due to the small amount of breast tissue and subareolar location of most male breast cancers. Answer C (radical mastectomy) is outdated and unnecessarily morbid. Radical mastectomy, which removes the pectoralis muscles, was abandoned decades ago when studies showed that total mastectomy with lymph node assessment provides equivalent survival with much less morbidity. Answer D (excision only) ignores the need for lymph node staging, which is essential for determining prognosis and adjuvant therapy decisions. Simply removing the mass without assessing nodal status would be inadequate cancer treatment. Key takeaway: Male breast cancer treatment defaults to mastectomy due to anatomical constraints, but follows the same staging principles as female breast cancer, including sentinel lymph node biopsy for appropriate patients.