Comparison between a healthy elbow and a hemophilic arthropathy of the elbow (hemarthrosis) in sagittal section. - 1 : on the right and on the left of the articular surface of the humerus are located the osteophytes - 3 : at the level of the articular surface of the humerus is located a geode (hole). - 2 : in the articular space of the elbow is represented a pinch of the articular line space; - 4 : in the middle of the humerus is represented a resorption of the olecranian fossa; - 5 : the darker area at the level of the articular surfaces represents subchondral osteocondensation. - 6 : we observe an epiphyseal hypertrophy at the level of the articular surfaces in addition to the osteophytes.