Xanthogranulomatous pyelonephritis: Sonographic-pathologic correlation of 16 cases

D. S. Hartman, C. J. Davis, S. M. Goldman, S. S. Isbister, R. C. Sanders

Research output: Contribution to journalArticlepeer-review

Abstract

Xanthogranulomatous pyelonephritis (XGP) is an uncommon renal inflammatory disease characterized by the destruction and replacement of normal parenchyma by sheets of lipid-laden histiocyte. The process may be diffuse or segmental. Sonograms of 16 cases of XGP (13 diffuse, three segmental) were retrospectively reviewed and correlated with their pathologic findings. The typical case of diffuse XGP demonstrates the following: renal enlargement, replacement of normal architecture by multiple fluid-filled masses, pelvic contraction or only moderate separation of the central echo complex, and a pelvic calculus. Although most cases have a large staghorn calculus, its sonographic demonstration may be difficult, perhaps as a consequence of peripelvic fibrosis. Atypical cases of diffuse XGP mimic pyelonephrosis with massive hydronephrosis and fluid-debris levels. In these atypical cases, a staghorn calculus is often conspicuously absent. Segmental XGP is recognized as an area of parenchymal destruction surrounding one calyx or one pole of duplication. Segmental XGP should be distinguished from focal xanthogranulomatous inflammation of the kidney, which is a distinct pathologic entity (cortical location, no pelvic communication, absent pyelitis). When typical gross pathologic features are present, sonography should make possible accurate identification of diffuse and segmental XGP.

Original languageEnglish (US)
Pages (from-to)481-488
Number of pages8
JournalJournal of Ultrasound in Medicine
Volume3
Issue number11
DOIs
StatePublished - 1984
Externally publishedYes

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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