Mesenteric lipomas are uncommon benign fat-containing lesions.
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Pathology
Like other lipomas, they are comprised of mature adipocytes.
Radiographic features
Although described on both CT and ultrasound, they are more commonly seen on CT.
Ultrasound
Usually seen as a well-encapsulated, homogenously hyperechoic mass. In cases complicated by volvulus, ultrasound can demonstrate twisting of the bowel and mesenteric vessels.
CT
Cross-sectional imaging can provide more information about the mass and associated complications such as bowel ischemia.
often contained and separate from free mesenteric fat
usually between -80 and -120 HU (which is identical to that of subcutaneous fat) 1
Treatment and prognosis
Surgical intervention is not required if mesenteric lipoma is an incidental finding for an asymptomatic patient. In cases complicated with volvulus or bowel ischemia, surgical intervention is necessary.
Differential diagnosis
On imaging consider:
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