A 49-year-old woman presents to her primary care physician for a general check up. She has not seen a primary care physician for the past 20 years but states she has been healthy during this time frame. She had breast implants placed when she was 29 years old but otherwise has not had any surgeries. She is concerned about her risk for breast cancer given her friend was recently diagnosed. Her temperature is 97.0°F (36.1°C), blood pressure is 114/64 mmHg, pulse is 70/min, respirations are 12/min, and oxygen saturation is 98% on room air. Physical exam is unremarkable. Which of the following is the most appropriate workup for breast cancer for this patient?

No intervention indicated at this time

A 61-year-old woman presents to a surgical oncologist for consideration of surgical removal of biopsy-confirmed breast cancer. The mass is located in the tail of Spence along the superolateral aspect of the left breast extending into the axilla. The surgical oncologist determines that the optimal treatment for this patient involves radical mastectomy including removal of the axillary lymph nodes. The patient undergoes all appropriate preoperative tests and is cleared for surgery. During the operation, multiple enlarged axillary lymph nodes are present along the superolateral chest wall. While exposing the lymph nodes, the surgeon accidentally nicks a nerve. Which of the following physical examination findings will most likely be seen in this patient following the operation?

Scapular protrusion while pressing against a wall

Internal rotation, adduction, and extension of the arm

Weakness in arm flexion at the elbow and numbness over the lateral forearm

Weakness in shoulder abduction and numbness over the lateral shoulder

Weakness in wrist extension and numbness over the dorsal hand

A 47-year-old woman comes to the physician for a mass in her left breast she noticed 2 days ago during breast self-examination. She has hypothyroidism treated with levothyroxine. There is no family history of breast cancer. Examination shows large, moderately ptotic breasts. The mass in her left breast is small (approximately 1 cm x 0.5 cm), firm, mobile, and painless. It is located 4 cm from her nipple-areolar complex at the 7 o'clock position. There are no changes in the skin or nipple, and there is no palpable axillary adenopathy. No masses are palpable in her right breast. A urine pregnancy test is negative. Mammogram showed a soft tissue mass with poorly defined margins. Core needle biopsy confirms a low-grade infiltrating ductal carcinoma. The pathological specimen is positive for estrogen receptors and negative for progesterone and human epidermal growth factor receptor 2 (HER2) receptors. Staging shows no distant metastatic disease. Which of the following is the most appropriate next step in management?

Lumpectomy with sentinel lymph node biopsy, followed by radiation and hormone therapy

Lumpectomy with sentinel lymph node biopsy followed by hormone therapy

Nipple-sparing mastectomy with axillary lymph node dissection followed by hormone therapy

Nipple-sparing mastectomy with axillary lymph node dissection, followed by radiation and hormone therapy

Radical mastectomy followed by hormone therapy

Three hours later, the patient is reassessed. Her right arm is put in an elevated position and physical examination of the extremity is performed. The examination reveals reduced capillary return and peripheral pallor. Pulse oximetry of her right index finger on room air shows an oxygen saturation of 84%. Which of the following is the most appropriate next step in management?

Obtain split-thickness skin graft

Perform right upper extremity amputation

Breast reconstruction options for USMLE Step 2 CK: High-Yield Surgery Lessons

🩸 Anatomy - Blood Supply Blueprint

Abdominal Flaps (TRAM/DIEP):
- Primary supply: Deep Inferior Epigastric Artery (DIEA) & Superior Epigastric Artery (SEA).
- Free TRAM/DIEP: Based on the larger, more robust DIEA perforators.
- Pedicled TRAM: Rotated on the intact SEA; higher risk of fat necrosis.
Latissimus Dorsi (LD) Flap:
- Primary supply: Thoracodorsal Artery, a branch of the Subscapular Artery (from Axillary Artery).
- 📌 Mnemonic: ThoracoDorsal supplies the Latissimus Dorsi.
Recipient Vessels (for free flaps):
- Anastomosis is typically to the Internal Mammary (Thoracic) Artery/Vein.

⭐ The DIEP flap is muscle-sparing, relying only on perforators from the DIEA. This ↓ postoperative pain and abdominal wall weakness/hernia risk compared to the muscle-sacrificing TRAM flap.

Hartrampf’s Zones of Perfusion in DIEP Flap

🏗️ Reconstruction Roadmap

Implant-Based Reconstruction
- Two-stage: Tissue expander placed, gradually filled, then swapped for a permanent implant.
- Risks: Capsular contracture (most common), infection, extrusion.
Autologous (Flap) Reconstruction
- Uses patient's own tissue (skin, fat, ± muscle).
- TRAM: Transverse Rectus Abdominis Myocutaneous flap; higher risk of abdominal wall weakness/hernia.
- DIEP: Deep Inferior Epigastric Perforator flap; muscle-sparing, lower hernia risk.

⭐ Delayed reconstruction is often chosen if post-mastectomy radiation therapy (PMRT) is planned, as radiation increases complication rates (e.g., capsular contracture, fibrosis) for implant-based reconstructions.

⚖️ Implants vs. Own Tissue (Autologous)

Feature	Implant-Based Reconstruction	Autologous (Flap) Reconstruction
Procedure	Simpler, shorter surgery. Often 2-stage (tissue expander → implant).	Complex, longer surgery. Requires microsurgery for free flaps (DIEP, SIEA).
Recovery	Faster recovery, less initial pain. Outpatient or short stay.	Slower recovery, donor site morbidity (pain, hernia risk with TRAM).
Complications	Capsular contracture (most common), rupture, infection, malposition.	Flap necrosis/failure (vascular compromise), fat necrosis, donor site hernia.
Aesthetics	Less natural feel, "cold" to touch, static appearance.	More natural look/feel, ages and changes weight with patient.
Longevity	Not lifetime devices; may require replacement (~10-15 yrs).	Permanent, "living" tissue.

📌 Flap Types: TRAM (Transverse Rectus Abdominis Myocutaneous) vs. DIEP (Deep Inferior Epigastric Perforator) - DIEP is muscle-sparing, ↓ hernia risk.

⚠️ Complications - Reconstruction Risks

General Risks (All Procedures):
- Bleeding, hematoma, seroma
- Infection, poor wound healing, skin necrosis
- Anesthesia risks, DVT/PE
- Chronic pain, altered sensation
Implant-Specific Risks:
- Capsular Contracture: Most common long-term complication; scar tissue tightens around implant.
- Implant rupture/leakage, malposition, asymmetry.
⭐ Breast Implant-Associated Anaplastic Large Cell Lymphoma (BIA-ALCL) is a rare T-cell lymphoma linked to textured-surface implants, presenting with delayed seroma.
Autologous Flap-Specific Risks:
- Flap Necrosis: Partial or total tissue loss due to vascular compromise.
- Donor Site Morbidity: Abdominal bulge/hernia (TRAM > DIEP), back weakness (LD flap).
- Fat necrosis, oil cysts.

Implant vs. Flap Breast Reconstruction Comparison

⚡ Biggest Takeaways

Autologous reconstruction (TRAM, DIEP) uses the patient's own tissue; it is preferred post-radiation.

The DIEP flap is muscle-sparing (perforator flap), reducing abdominal morbidity versus the TRAM flap (rectus abdominis muscle).

A key TRAM flap risk is subsequent abdominal wall weakness or hernia.

Implant-based reconstruction is simpler but risks capsular contracture, infection, and failure, especially with radiation.

The Latissimus dorsi flap is another autologous option, often requiring an implant for volume.

Timing can be immediate or delayed, influenced by adjuvant therapy needs.

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