The two lesions, ossification and calcification, are identical in nature. They both result from abnormal deposits of calcium salts within the soft tissues, leading to lesions. The difference between the two is simply one of degree. Clinically, if there is an injurious ossification, it is often indicative of a large amount of calcium deposits in the soft tissues, resulting in a loss of mobility and a very hard texture. This condition is often accompanied by decreased mobility and significant pain in the joint. In the case of a calcified lesion, it is often a very mild calcium deposit. For example, very small localized deposits of calcium salts at the stops of tendons or intervertebral discs, resulting in localized foci of calcification. In the majority of cases, these foci of calcification do not have a significant impact on the patient, and may only cause minor local pain or pressure and irritation of the associated nerve roots when the calcification is more severe.