Fig. 4
Development of Hoffa- and effusion-synovitis with weight loss. This 53-year-old women had a baseline BMI of 33.3 kg/m2 and lost 10.6% weight over 48 months. Medial and lateral subcutaneous fat (SCF) measurements decreased each by 5 mm from baseline to 48-months follow-up. Hyperintense signal changes in Hoffa’s fat pad anterior to trochlear cartilage increased from grade 1 at baseline (a) to grade 2 at 48-months follow-up (a’). Effusion-synovitis remained stable at grade 1 at baseline (b) and 48-months follow-up (b’) with MOAKS definitions not able to capture a slight decrease