Fig. 4From: Cytomegalovirus‐associated esophagitis on early esophageal cancer in immunocompetent host: a case reportHistological and immunohistochemical analysis of the ESD specimen. a HE staining in the erosive part of the SCC into fourteen-pieces (Fig. 3b arrow). b Magnified view of the PD-L1 expressing area outlined by the black square in a. A small amount of PD-L1 positive cancer cells was partially observed in only the limited region. c Only a few CMV-positive cells were found in the vicinity (corresponding area, arrow) of the PD-L1 expressing cancer cells at the serial section of bBack to article page