Figure 3 Physical and pathological findings of patients suspected to have graft-versus-host diseases and confirmation of donor chimerism. (A) Skin rash of case 1. (B) Trunk tissue biopsy findings of case 1 showing vacuolization (arrow) and basal cell degeneration. (C) Trunk tissue biopsy findings of case 2 showing an eosinophilic body at the lower layer of the epidermis (arrows). (D) Colonoscopic biopsy findings of case 3 exhibiting ulcer (arrow) and decreased number of crypts with size variation. B–D: hematoxylin and eosin staining. Scale bar is located in the lower-left corner.