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Fig. 12C The labral chondral transitional zone in femoroacetabular
impingementschematic, MRI, and arthroscopic findings. In 32-year-old
man, arthroscopic view of labral-chondral transitional zone shows
full-thickness loss of articular cartilage in adjacent acetabulum (grade 3)
(black arrow) and separation of labrum (white arrow) at its
attachment, which has been lifted by arthroscopic probe.