CT abdomen shows well-circumscribed inhomogeneous fatty mass with
higher attenuation than normal retroperitoneal fat extending from
mesenteric root toward left abdomen and surrounding mesenteric vessels
without distortion. Scattered, discrete nodules of soft tissue density
engulfed by hypodense fatty halo are seen inside the mass. It is
chronic nonspecific inflammation involving the adipose tissue of
the bowel mesentery.