PETRIFIKAT (Greek petra rock, stone + lat. to do facere; synonym kaltsinat) — focal adjournment of salts of calcium in sites of the expressed dystrophic changes and necrotic masses.
Items meet practically in all fabrics and bodies, but most often apply the term to designation of deposits of salts of calcium in easy (fig.) and limf, nodes, the arising hl. obr. at tuberculosis. In most cases P. represent a trace safely resolved patol. process, but meet also in tumors. So, the dot kaltsinata seen on mammograms (see. Mammography ), are noted at a breast cancer (see). The item gives the intensive, accurately outlined shadow since salts of calcium have a high absorbtion coefficient of x-ray emission on the roentgenogram. The form, localization and P.'s character allow to establish in most cases as a result of what patol, process it arose. Further on site P. can develop a bone tissue (see. Ossificates ).
In some cases P. should distinguish from the foreign bodys and pharmaceuticals entered into an organism containing barium, iodine, bismuth, etc.
Bibliography: Dyachenko V. A. Radiodiagnosis of calcifications and heterogeneous okosteneniye, M., 1960, bibliogr.
V. V. Kitayev.