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. 2013 Jul 31;44(10):1975–1981. doi: 10.1007/s00595-013-0669-3

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© The Author(s) 2013

Open AccessThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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Fig. 3 — The results of a histopathological analysis of the tumor sample obtained from the left lobectomy. a The gross appearance of the resected tissue. b The H&E staining (×100) revealed a well-differentiated papillary hilar bile duct cancer [T1 (fibromuscular layer, fm) N0M0 Stage IA (Union Internationale Contre le Cancer, UICC TNM staging) (arrowheads)]. c Immunostaining of the tumor for MLH1 (×400). d Immunostaining of the tumor for MSH2 (×400). Immunoreactivity was observed for MSH2, but not for MLH1