70-year-old man with acute pathologically proven mesenteric panniculitis. Axial contrast-enhanced CT scan shows ill-defined, inhomogeneous fatty mass with hyperdense peripheral stripe (arrow). Mesenteric vessels (black arrowhead) with no distortion and lymph nodes (white arrowhead) are engulfed by fatty halos (open arrow). Note smooth displacement in adjacent small bowel loops (white open arrowhead).