Fig. 2From: Chronic active Epstein-Barr virus infection involving gastrointestinal tract mimicking inflammatory bowel diseaseHistopathological findings of CAEBV patient (case 11). a Haematoxylin and eosin (H&E) staining showed Lymphoid cells distributed in muscular layer and serosa; b, c Immunohistochemical staining revealed positive expressions of CD4+ (b), CD20+ (c); (d) In situ hybridization indicating positive EBERBack to article page