Fig. 1From: Labral calcification plays a key role in hip pain and symptoms in femoroacetabular impingementLabral tissue morphology and degradation. a Safranin-O-Fast green staining (S-O-FG) to access the labral degeneration from one representative FAI patient. b Alizarin red (AR) staining for calcium deposition in the same patients. Arrows indicate small calcium deposits also showed in the insert. Scale bar, 500 μm; insert 100 μmBack to article page