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. 2017 Mar 29;18:106. doi: 10.1186/s12882-017-0520-y

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — a Mild interstitial inflammation, moderate interstitial fibrosis and tubular atrophy with intratubular crystal deposition. (400X, PAS staining). b The deposits appeared strongly birefringent, forming fan-like, sheaf-like, or irregular shapes consistent with calcium oxalate crystals (400X, polarized light). c Almost all tubular lumens were filled with crystals (100X, polarized light)