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Grade 1 conventional ultrasound images. A 50-year-old man with a 2.5×2.0 cm solid tumor underwent a robotic partial nephrectomy (RPN). A. Conventional US displayed a hyperechoic mass located in the upper pole of the left kidney (arrows). B. At 24 hours after RPN, conventional US indicated a grade 1 wound: a normal kidney shape, regular anastomosed renal parenchyma, and a relatively smooth capsule (arrow). C. Diagrammatic representation of a grade 1 surgical renal wound.
