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. 2008 Mar 1;452(4):353–362. doi: 10.1007/s00428-008-0585-x

Fig. 5.

Fig. 5

Cytokeratin 20 expression pattern analysis in PUNs. a CK20 expression was restricted to the surface. b Patchy areas of CK20 immunoreactivity had spread. c Solid compactum of positive expression was noted. d Diffuse CK20 expression was observed