A 48-year-old woman from Delhi presents with a 2 cm hard, irregular mass in the upper outer quadrant of the right breast discovered on self-examination 3 weeks ago. On clinical examination, the mass is fixed to the chest wall, and there is palpable matting of axillary lymph nodes on the ipsilateral side. Skin dimpling is noted over the mass. Mammography confirms a BIRADS 5 lesion. Core needle biopsy shows invasive ductal carcinoma (IDC). Staging investigations including chest X-ray, abdominal ultrasound, and bone scan are normal. What is the most appropriate surgical management for this patient?

Explanation

## Clinical Assessment This patient presents with a locally advanced breast cancer (T3N1M0) based on: - Tumor size: 2 cm (T1/T2 range, but fixed to chest wall suggests T4) - Fixation to chest wall: T4 disease - Palpable matted axillary lymph nodes: N1 disease - No distant metastases: M0 ## Surgical Management Principles **Key Point:** Breast-conserving therapy (BCT) is contraindicated in T4 disease, skin involvement, or fixation to chest wall. Modified radical mastectomy (MRM) is the standard of care for locally advanced breast cancer. **High-Yield:** The presence of chest wall fixation (T4 disease) automatically excludes BCT as an option, regardless of tumor size or nodal status. ## Why Modified Radical Mastectomy? | Criterion | Assessment | Implication | | --- | --- | --- | | Tumor fixation | Yes (to chest wall) | Requires MRM | | Axillary involvement | Matted nodes (N1) | Requires ALND | | Distant metastases | None detected | M0 — suitable for surgery | | Skin involvement | Dimpling present | Confirms T4 status | **Clinical Pearl:** Skin dimpling indicates dermal involvement by tumor, which is part of T4 disease definition. This mandates mastectomy with adequate margins. ## Surgical Technique Modified radical mastectomy includes: 1. Total mastectomy (removal of breast tissue, nipple-areolar complex, and skin overlying the tumor) 2. Axillary lymph node dissection (Levels I, II, and III) 3. Preservation of pectoralis major and minor muscles (unlike classical radical mastectomy) **Mnemonic:** MRM = **M**astectomy + **R**emoval of **M**uscles (pectoralis major/minor are PRESERVED, unlike Halsted radical mastectomy) ## Why Not Other Options? - **BCT:** Contraindicated due to T4 disease (chest wall fixation) - **Simple mastectomy:** Inadequate — does not address axillary nodal disease; ALND is mandatory - **Neoadjuvant chemotherapy first:** While sometimes used in locally advanced disease to downstage, the primary surgical approach remains MRM with ALND; neoadjuvant is an adjunct, not a replacement for surgery in this context **High-Yield:** In India, MRM remains the gold standard for locally advanced breast cancer (Stage III) due to cost-effectiveness and proven oncologic outcomes comparable to BCT in early-stage disease. [cite:Sabiston Textbook of Surgery Ch 36]