摘要: A 20-year-old man who had idiopathic end-stage renal failure since he was 12 years of age and undergoing dialysis once weekly (with stable serum electrolyte, blood urea nitrogen, creatinine levels) presented with a large, nontender mass on his hard palate that grown during 10-month period (Panel A). Computed tomography revealed round, expansile lesion arising from the evidence ossification (Panels B C). The calcium level 9.5 mg per deciliter (2.4 mmol liter), phosphorus 7.0 (2.3 . . .