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(a) B-mode ultrasound showing hypoechoic lymph node with irregular margins and absent hilum, (b) elastography image showing hard area occupying entire lymph node corresponding to pattern 5, and (c) acoustic radiation force impulse imaging shows a shear wave velocity of 5.84 m/s in the boxed area. Histopathology revealed metastatic lymph node from small cell carcinoma lung
