Lipoma Arborescens of the Knee: Report of Three Cases and Review of the Literature

Figure 1

CT images on axial (a) and reconstructed coronal (b) plane in soft tissue window reveal a low-density intra-articular mass similar to fat with multiple villi projecting inwards (arrows), which are surrounded by joint fluid with higher density than fat but lower than water. Distention of the joint capsule is evident.

(a)

(b)