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  • Title: Clinical, histological, and chemical characterization of ectopic calcification in dialyzed and non-dialyzed patients.
    Author: Portigliatti Barbos M, Cadario A, Canavese C, Pavan I.
    Journal: Ital J Orthop Traumatol; 1991 Dec; 17(4):523-32. PubMed ID: 1816158.
    Abstract:
    In a review of 11 cases of ectopic calcification (5 of which in dialyzed patients and one in a paraplegic), the authors attempt to characterize this disorder in all its various forms using histological, clinical, and chemical methods. In dialyzed patients, two contributing factors were identified: hyperphosphatemia (plus hypercalcemia) and secondary hyperparathyroidism. In hyperphosphatemic patients the calcifications are multiple, paraarticular, labile, and have a fluid-viscous consistency. In secondary hyperparathyroidism, in addition to the above metastatic calcification there is dystrophic calcification typically localized in the anterior muscles of the hip and thigh. The ectopic calcification of the non-dialyzed patients is true ossification. The precise moment of the onset of the lesion is not always discernable, but its evolution points to primary or secondary local irritation as the trigger. Ossification is the predominant phenomenon in the paraplegic as well, while the triggering mechanism is still unknown.
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