Malignant peritoneal mesothelioma

Table 6 Interpretative CT classification of small bowel and small bowel mesentery for DMPM

Class	Interpretative CT classification of small bowel and small bowel mesentery
0	No ascites in the region of the small bowel; no evidence of peritoneal tumor present; the jejunal and ileal vessels appear as round and curvilinear densities within the mesenteric fat
I	Free ascites only; mesentery is stranded and stratified as the fluid accumulation outlined the small bowel mesentery; small bowel vessels are easily identified within the mesenteric fat
II	Tumor involvement of small bowel and/or its mesentery; peritoneal surface is thickened and enhanced due to the presence of tumor nodules or plaques; there may be an increased amount of ascites and the mesentery may appear stellate or pleated
III	Increased solid tumor involvement and adjacent small bowel loops are matted together in some cuts; small bowel mesenteric vessels are difficult to define due to obliteration of mesenteric fat