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Illustration of CT features of CCRCC in axial images: (A) tumor size (white line) and blurred tumor boundary; (B) necrosis imaging; (C) renal vein invasion; (D) collecting system invasion; (E) intratumoral vessels; (F) positive lymph node metastasis; (G–I); visual relative enhancement: (G) hypoattenuating, (H) isoattenuating, (I) hyperattenuating; (J–L) enhancement pattern: (J) homogeneous enhancement, (K) relative homogeneous enhancement, (L) heterogeneity enhancement.
