[A Rapidly Growing Cardiac Calcified Amorphous Tumor in a Peritoneal Dialysis Patient:Report of a Case].

A calcified amorphous tumor( CAT) is a non-neoplastic cardiac tumor, which has been reported to be associated with hemodialysis dependent end-stage renal disease. We report a case of CAT attached to mitral annular calcification (MAC) in the posterior leaflet annulus of the mitral valve in a 56-year-old man who had been receiving peritoneal dialysis for three years. The CAT grew to 10 mm long in a half year. Peritoneal dialysis dependent end-stage renal disease is associated with MAC. Additionally, MAC-related CAT has been reported growing rapidly. We should perform periodic echocardiography not only for hemodialysis patients but also for peritoneal dialysis patients. When CAT is diagnosed, operation should be performed early to prevent embolism such as cerebral infarction.