<prompt> Dystrophic calcification is commonly seen inHyperparathyroidismVitamin D deficiencyAtheromatous plaqueRenal disease  <response>: C Atheromatous plaque DYSTROPHIC CALCIFICATION: Calcium and phosphorus metabolism and serum levels are normal and calcification occurs as a result of local abnormality in tissue. Circumstances is which dystrophic calcification occurs: Necrotic tissue: Fat necrosis; Caseation necrosis in the centre of granuloma; Dead parasites cysticercosis, hydatid cyst etc. Abnormal blood vessels heart: Atheromatous plaque; Organized thrombi in veins; Abnormal cardiac valve Aging or damaged tissue: Pineal gland; Laryngeal cartilage; Monekebergs medial sclerosis Neoplasm: Brain tumor meningioma,craniopharyngioma, oligodendroglioma; Papillary carcinoma thyroid; Serous tumors of ovary; Breast carcinoma; Chondrosarcoma Tumor Calcinosis: Formation of nodular non neoplastic calcific masses in subcutaneous tissue 