Fig. 1A 64-year-old man with diffuse mesenteric extramedullary hematopoiesis
with ascites. Contrast-enhanced axial CT image shows diffuse infiltration of
small bowel mesentery and encasement of small bowel.
Fig. 1B 64-year-old man with diffuse mesenteric extramedullary hematopoiesis
with ascites. Axial T1-weighted image with fat saturation at a similar level
to A shows mesenteric infiltrate to be isointense to muscle.
Hyperintense fluid within small bowel lumen is iodinated contrast from
fluoroscopic study performed on same day.
Fig. 1C 64-year-old man with diffuse mesenteric extramedullary hematopoiesis
with ascites. Corresponding axial T2-weighted image demonstrates mesenteric
infiltrate to be iso- to mildly hyperintense to muscle. Liver (L) is markedly
hypointense due to transfusion-related secondary hemosiderosis.
Fig. 1D 64-year-old man with diffuse mesenteric extramedullary hematopoiesis
with ascites. Gadolinium-enhanced coronal T1-weighted image with fat
saturation shows early mild enhancement of mesenteric infiltrate.
Fig. 1E 64-year-old man with diffuse mesenteric extramedullary hematopoiesis
with ascites. Gadolinium-enhanced coronal T1-weighted image with fat
saturation shows late mild enhancement of mesenteric infiltrate.
Fig. 1F 64-year-old man with diffuse mesenteric extramedullary hematopoiesis
with ascites. Longitudinal sonogram of mesentery shows hypoechoic soft tissue
interposed between two bowel loops (B).