Background: Lipoma arborescens is characterized by the villous proliferation of the synovium and diffuse hyperplasia of fatty tissue in the subsynovial layer, almost always with a periarticular lesion. According to past articles, fewer cases have depicted the imaging features of lipoma arborescens.
Purpose: To evaluate the computed tomography (CT) and magnetic resonance imaging (MRI) features of lipoma arborescens.