Fig. 1From: Characterization of osteoarthritic human knees indicates potential sex differencesGross changes in osteoarthritic joints. a Radiograph showing joint narrowing and bone-to-bone contact. b Articular cartilage showing areas of minimal fibrillation (arrow) and areas of maximum erosion (star). c Safranin-O-stained fibrillated cartilage showing loss of proteoglycanBack to article page