In what conditions is pathologic calcification observed:__________?
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Answer: A. Scleroderma
Explanation
Scleroderma and various other connective tissue diseases are sometimes associated with pathological soft tissue and vascular calcifications. Chronic inflammation and tissue ischemia in autoimmune disorders can trigger aberrant calcium salt deposition in dermal layers. This pathological calcification manifests clinically as hard nodules or calcinosis cutis in affected patients. Pathological calcification refers to the abnormal deposition of calcium salts in soft tissues along with smaller amounts of iron and magnesium. Dystrophic calcification occurs in dying or necrotic tissues despite normal serum calcium levels, whereas metastatic calcification requires hypercalcemia. Connective tissue disorders frequently involve microvascular damage leading to localized tissue hypoxia and subsequent mineralization.
Lichen planus is a chronic inflammatory dermatosis affecting skin and mucous membranes without characteristically causing soft tissue calcification. Dystrophic epidermolysis bullosa involves fragile blistering skin and severe scarring but is distinct from systemic scleroderma calcifications. Lupus erythematosus is an autoimmune multi-organ disease featuring diverse cutaneous and systemic manifestations distinct from scleroderma calcinosis.
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