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Fig. 3B —Graft-versus-host disease (GVHD) after allogeneic
hematopoietic stem cell transplantation (HSCT). 28-year-old man with chronic
myeloid leukemia presenting after allogeneic HSCT with profuse diarrhea
related to severe acute GVHD. Note generalized small-and large-bowel wall
thickening with mucosal enhancement and submucosal edema (target sign). There
is no relevant perienteric stranding. CT scan shows segmental small-bowel
thickening with increased mucosal enhancement (arrow, A) as
well as thin-walled jejunal segments.