D

Myositis ossificans represents heterotopic bone formation in previously injured muscle and is a classic example of dystrophic calcification, which occurs in damaged tissues despite normal serum calcium levels [Tong, 1994, PMID 7920358]. In contrast, hyperparathyroidism, sarcoidosis, and hypervitaminosis D cause metastatic calcification driven by systemic hypercalcemia, not localized tissue injury.