Calcification in polycystic disease.

Two patients with polycystic disease demonstrated extensive calcification in the kidneys, liver, and spleen. Though flecks of calcium have been noted in the walls of such cysts, to the authors' knowledge, curvillinear, arcuate, and central amorphous calcifications have not been previously reported. Dystrophic calcifications may be diagnosed solely on the basis on polycystic disease with superimposed hemorrhage and infection. Polycystic disease should be included in the differential diagnosis of abdominal calcifications.