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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
A metastatic urachal adenocarcinoma in the left lung ((A) haematoxylin, eosin and safran) showing patchy staining for (B) CK34βE12, (C) CDX2 and (D) Calretinin but no staining for (E) p40 and (F) GATA3 ((B–F) immunoperoxidase).