Comb sign, Crohn disease, CT

Comb sign 
: hypervascular appearance of the mesentery in active Crohn disease. 
: fibrofatty proliferation and perivascular inflammatory infiltration outline the distended intestinal arcades.
 : not pathognomonic of Crohn disease.

https://www.youtube.com/watch?v=NOka2RbawLY&feature=youtu.be

REF. https://radiopaedia.org/articles/comb-sign-mesentery