Abstract

Xanthogranulomatous pyelonephritis is a rare form of chronicpyelonephritis, characterized by yellow masses macroscopically, and infiltration of foamy lipid-laden macrophages, mononuclear cells and rare giant cells microscopically. The disease is often misdiagnosed as other renal diseases such as renal tuberculosis or renal cell carcinoma. We have recently experienced two cases of xanthogranulomatous pyelonephritis in 24- and 53-year-old Korean females.