Hoffa fat pad injuries

Hoffa’s fat

pad abnormalities, knee pain and magnetic resonance imaging in daily practice. HFP acute trauma (pivot shift). MRI proton density with fat saturation image shows HFP apex oedema (thin arrows), oedema of the external femoral condyle and of the corresponding tibial plateau (thin arrows), with joint effusion (wide arrows)

Hoffa’s fat

pad abnormalities, knee pain and magnetic resonance imaging in daily practice. HFP acute trauma (direct contusion). MRI proton density with fat saturation images show HFP oedema, patellar oedema and joint effusion (thin arrows) (a) with fluid-fluid levels in axial image (wide arrows) related to hemarthrosis (b)

Hoffa’s fat

pad abnormalities, knee pain and magnetic resonance imaging in daily practice. HFP acute trauma. MRI proton density with fat saturation image, after direct trauma, shows HFP fragmentation (arrows)

Hoffa’s fat

pad abnormalities, knee pain and magnetic resonance imaging in daily practice. Hoffa’s disease. Repetitive microtraumas with hyperextension and rotational strain in soccer player. MRI proton density with fat saturation images demonstrates an enlarged, oedematous HFP

Hoffa’s fat

pad abnormalities, knee pain and magnetic resonance imaging in daily practice. Post-arthroscopic fibrosis. Sagittal T1w image (a) post-arthroscopy shows scarring in the HFP (arrows) that is oedematous and hypervascularised (arrows) on proton density with fat saturation image (b)

Hoffa’s fat

pad abnormalities, knee pain and magnetic resonance imaging in daily practice. Cyclops lesion. Sagittal proton density image, post ACL reconstruction, shows hypointense mass in the fat pad, which is oedematous

Hoffa’s fat

pad abnormalities, knee pain and magnetic resonance imaging in daily practice. Post-surgical fibrosis. Axial T2w (a) and sagittal proton density with fat saturation (b) images show hypointense post-surgical fibrosis in the fat pad (arrow), which is oedematous