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Fig. 2B. 23-year-old man with posteroinferior sublabral sulcus,
preoperatively misinterpreted as labral tear. Arthroscopic view from
anterolateral portal shows tip of probe on normal posterior labrum. Sublabral
groove (arrows) with smooth contour separates acetabular articular
cartilage (A) from labrum (L). Femoral head (F) is on right and posterior
joint capsule (C) is on left. On surgical inspection, posterior labrum was
stable with no evidence of tissue trauma.