Gross Anatomy USMLE Step 1 Practice Question
A 49-year-old woman undergoes axillary lymph node dissection for breast cancer. Postoperatively, she presents with inability to forcefully extend and adduct her right arm, limiting crutch use. Vital signs are stable (BP 128/82, HR 82, RR 16, temp 37.2°C, SpO2 98%). Examination reveals intact shoulder abduction and normal sensory function. Chest X-ray shows no pneumothorax. Which nerve was most likely injured during the procedure?
Answer choices
- AThoracodorsal nerveCorrect answer
- BSuprascapular nerve
- CDorsal scapular nerve
- DLong thoracic nerve
- EAxillary nerve
- FUpper subscapular nerve
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