Pancreatic lipomas are uncommon mesenchymal tumors of the pancreas.
Rarely symptomatic, they are most often detected incidentally on cross-sectional imaging for another purpose. If they do cause symptoms, it will typically be those related to regional mass effect from the mass.
Mature fat cells with thin internal fibrous septa. It differs from pancreatic lipomatosis in that it has well-defined margins conferred by a thin collagen capsule.
- well-circumscribed, lobulated lesion in the pancreas that measures fat attenuation (≤10 HU)
- does not enhance
- well-circumscribed, lobulated lesion in the pancreas that is T1 and T2 hyperintense
- saturates on a fat-saturated sequence
- may not be hypointense on an out-of-phase sequence (edge may show "india-ink" artefact)
- difficult to diagnose: may be hyperechoic or hypoechoic
Treatment and prognosis
They are benign lesions, and only rarely require resection.