Diagnosis
Careful examination of the collateral cartilages by palpation can give a good indication that they are solid and bony rather than firm, springy cartilage. Usually, however, sidebone is found accidentally when the foot is radiographed, as sidebone has few outward signs in most cases. In mild cases, there are small areas of calcification; more advanced cases will have ossification of the entire cartilage. Rarely, severe lameness can be caused by fracture of an ossified cartilage, or by ossification which deviates enough to impinge on the short pastern bone.
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