[Tumour-like calcification and metastic calcification in teritary hyperparathyroidism (author's transl)]

Tertiary hyperparathyroidism in a 47-year-old woman was accompained by metastatic and "tumour-like" calcifications. The latter were characterized by tumours of different-sized calcium-containing pseudocyts, surrounded by a cell-rich tissue predominantly containing fibroblasts, histocytes and foreign-body giant cells, which in their cytoplasm contained Cossa-positive particles. Pathogenesis and aetiology of the disease are largely unknown.