A 56-year-old Chinese woman with end-stage renal disease (ESRD) on continuous ambulatory peritoneal dialysis for 3 years suffered from progressive bilateral hip pain for months due to tumoral calcinosis (periarticular soft tissue calcification). She received lanthanum carbonate 1 tablet three times daily (total 2250 mg) as a non-calcium phosphate binder for hyperphosphatemia-associated tumoral calcinosis (serum phosphate concentration 9.3 mg/dL) for 6 months. To evaluate whether the tumoral calcinosis was reduced or not, she received an x-ray examination which showed starry radiopacities scattered all over the abdomen (Figure 1).
Figure 1.
Abdominal roentgenogram shows widespread radiopaque spots in the lumen of gastro-intestinal tract and tumoral calcinosis over bilateral hip regions.
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