Progressive renal shrinkage after simple pyelonephritis

Nonobstructive, nonrefluxing pyelonephritis (or "simple" pyelonephritis) is not commonly associated with progressive renal scarring and global shrinkage. Although children are believed to be particularly susceptible to renal parenchymal scarring after simple pyelonephritis, progressive and global renal shrinkage remains an elusive clinical entity. We present such a case with close radiologic documentation.