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Fig. 12B —The labral chondral transitional zone in femoroacetabular impingement—schematic, MRI, and arthroscopic findings. Coronal proton density-weighted fast spin-echo sequence (TR/TE, 4,000/34) in 32-year-old man shows MR appearances illustrated in A. High-signal cleft can be seen at labral-chondral transitional zone and extending to subchondral bone plate (black arrow). Note also cystic change at anterosuperior femoral neck (white arrow).