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Figure 1: (a) Noncontrast computed tomography scan showing pyelonephritis left kidney with extensive perinephric and paranephric fat stranding with involvement of the left colonic mesentery by the inflammatory process. (b) Noncontrast computed tomography scan showing progression of the inflammatory process compared to Figure 1a. There is extensive inflammation of the colonic mesentery with thickening and stranding of the colonic wall. There is extension of inflammation into the lesser sac also

Figure 1: (a) Noncontrast computed tomography scan showing pyelonephritis left kidney with extensive perinephric and paranephric fat stranding with involvement of the left colonic mesentery by the inflammatory process. (b) Noncontrast computed tomography scan showing progression of the inflammatory process compared to Figure 1a. There is extensive inflammation of the colonic mesentery with thickening and stranding of the colonic wall. There is extension of inflammation into the lesser sac also