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Quadriceps and patellar tendons are intact. High riding patella (Insall-Salvati ratio 1.51) with lateral translation and tilt. TT-TG is borderline (13 mm). Trochlea is well formed. Full-thickness chondral wear of the lateral femoral trochlea characterised by subchondral oedema. Pre-femoral fat pad and superolateral Hoffa's fat pad oedema.