Fig. 1From: Application of contrast-enhanced ultrasound in diagnosis and grading of bladder urothelial carcinomaGeneral pathology of high-level BUC. (A) High-grade BUC gross specimen. (B) Microscopically, tumor cells are diffusely distributed in patches, infiltrating the muscle layer, with hyperchromatic nuclei, inconsistent sizes, inconspicuous nucleoli, and obvious mechanical damage in some regionsBack to article page