How can these lesions be categorised?
According to the Milgram classification. Type 1: sharply delineated, viable lipomas with homogeneous fat content Type 2: predominantly fatty lesions with central necroses, calcifications or ossifications Type 3: heterogeneous, fat-containing lesions with multiple necroses, cystic transformations, wall sclerosis, and extensive calcifications or ossifications.
Where are intraosseous lipomas most frequently found?
Most are in the lower limb (71%) with the most common locations being the calcaneum (32%) and the femur (20% - especially the intertrochanteric region).
An intramedullary lesion is noted at the intertrochanteric metadiaphyseal region of the left femur. It has a homogeneous hypodense texture with fat-density, intact thin sclerotic bone boundary and no post-contrast enhancement.