24-year-old man was diagnosed with complete MPFL tear at its femoral attachment in acute first-time LPD. After 16 months, he had recurrent LPD.Axial fat-saturated proton density-weighted fast spin-echo imaging sequence shows complete discontinuity of MPFL at its femoral attachment with retraction of fibers anteriorly and extensive surrounding edema (open arrow) in first-time LPD.