Stress-related bone injury and 'subchondral bone' pain in young Thoroughbred athletes, particularly in the fetlock and carpus, are well recognised (Davidson and Ross 2003]. However, with the exception of subchondral bone cysts and osseous cystlike lesions, subchondral bone pain has generally been overlooked, despite the relative early recognition of increased intraosseous pressure in some horses with navicular bone pathology [Svalastoga 1983) and osteoarthritis of the distal hock joints [Kristoffersen 1981; Sonnichsen and Svalastoga 1985].
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