Can you properly diagnose this 45-year old?
45-year-old presenting with gradual abdominal swelling.
Scanogram of the abdomen shows diffuse abdominal swelling with displacement of bowel loops displaced laterally. CT of the abdomen shows an ill-defined low density fat containing lesion occupying the entire abdomen and extending into the pelvis. Bowel loops are displaced and compressed anteriorly.
What is your diagnosis?