Imaging findings in lipoma arborescens.

To cite: Aswani Y, Anandpara KM, Hira P, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2014208293 DESCRIPTION A 27-year-old man presented with painless swelling of the right knee of 4 months’ duration. There was no history of trauma or other joint involvement. The patient’s serum rheumatoid factor was negative. Radiograph of the knee revealed increased lucency in the prefemoral region (figure 1A). Ultrasonography depicted echogenic, frond-like hypertrophy of the synovium in the suprapatellar bursa (figure 1B). This hypertrophied synovium was