The CT scan demonstrates a regular circumferential submucosal thickening of the proximal jejunum (length = 16 cm) with preserved mucosal layer. There is mesenteric vascular congestion with free intraperitoneal effusion mainly around the spleen, in the left paracolic gutter, and pelvis (mean density of fluid = 35 HU). The mesenteric vessels (SMV and SMA) are patent.