Answer

Focal Nephrographic Defect Acute Pyelonephritis CT
Axial CT through the kidneys shows a focal nephrographic defect in the upper pole of the right side of a horseshoe kidney. There is mils perinephric prominence of the associated posterior peritoneum. This patient presented with fever, back pain had white cells in her urine . Finding are consistent with acute pyelonephritis
Ashley Davidoff MD TheCommonVein.net 29229