Table of Contents Author Guidelines Submit a Manuscript
Pathology Research International
Volume 2010, Article ID 602523, 3 pages
http://dx.doi.org/10.4061/2010/602523
Case Report

Liesegang Rings in Xanthogranulomatous Pyelonephritis: A Case Report

1Hospital de Clínicas de Porto Alegre, RS, Brazil
2Universidade Luterana do Brasil, RS, Brazil
3Hospital Nossa Senhora da Conceição, Av. Francisco Trein, 596, Laboratório de Patologia, 2 andar B. Cristo Redentor, Porto Alegre, Rio Grande do Sul, Brazil

Received 6 August 2009; Accepted 14 October 2009

Academic Editor: Helen Liapis

Copyright © 2010 Karla Laís Pegas et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Liesegang rings are concentric noncellular lamellar structures, rarely seen in vivo, occurring as a consequence of the accumulation of insoluble products in a colloidal matrix. These characteristic structures are a rare phenomenon usually found in association with cystic or inflammatory lesions and may be mistaken for parasites. The authors examined Liesegang rings from an inflammatory kidney lesion identified previously as a tumoral lesion on computerized tomography. On microscopic evaluation, Liesegang rings can be mistaken for eggs and larvae of parasites, psammoma bodies and calcification. Special stains like PAS, Grocott, von Kossa and Masson's trichrome facilitate the diagnosis.