英語原文：
A 79-year-old woman with a history of hypertension, insulin-dependent diabetes mellitus, and coronary artery disease presents with acute coronary syndrome. She undergoes percutaneous coronary angiography. At 24 hours after the procedure, her serum creatinine rises from 1.0 mg/dL to 1.5 mg/dL. At 72 hours after the procedure, it returns to 1.0 mg/dL. She is discharged on hospital day four. Two weeks later, she returns to the emergency department with severe bilateral lower extremity neuropathic pain. Laboratory results revealed the following serum values: sodium 140 mEq/L, potassium 5.1 mEq/L, chloride 97 mEq/L, carbon dioxide 17 mEq/L, blood urea nitrogen 45 mg/dL, creatinine 3.5 mg/dL, creatine kinase 520 U/L; and the following urine values: specific gravity 1.015, blood 2+, protein 2+, red blood cells 10-15 cells per high-power field. Granular casts are seen.Which of the following is the most likely etiology of this patient’s acute kidney injury?
A. Diabetic nephropathy
B. Contrast-induced nephropathy
C. Pigment nephropathy
D. Atheroembolic renal disease
中文翻譯：
1名79歲女性患者，有高血壓、胰島素依賴型糖尿病和冠狀動脈疾病的病史，表現為急性冠脈症候群。她接受了經皮冠狀動脈造影。術後24小時，她的血清肌酐從1.0 mg/dL升高到1.5 mg/dL。術後72小時，恢復至1.0 mg/dL。她在住院第4天出院。2周後，患者因重度雙下肢神經病理性疼痛返回急診科。實驗室檢查結果顯示以下血清值：鈉140 mEq/L，鉀5.1 mEq/L，氯化物97 mEq/L，二氧化碳17 mEq/L，血尿素氮45 mg/dL，肌酐3.5 mg/dL，肌酸激酶520 U/L；以下尿液值：比重1.015，血液2 +，蛋白質2 +，紅細胞10-15個細胞/高倍視野。可見顆粒管型。