Table 2 Evidence of renal phosphate wasting as determined by calculation of tubular maximum for phosphate corrected for glomerular filtration rate (TmP/GFR). The patient in case 3 had a 24-h urine phosphorus measurement of 900 mg/24 h, but urine creatinine measurement was not obtained, so TmP/GFR was not calculated
From: A rare cause of atraumatic fractures: case series of four patients with tumor-induced osteomalacia
Case 1 | Case 2 | Case 4 | |
|---|---|---|---|
Serum phosphorus (2.7–4.6 mg/dL) | 1.7 | 1.3 | 1.8 |
Serum creatinine (0.5–1.0 mg/dL) | 0.77 | 0.85 | 0.90 |
Urine phosphorus (mg/dL) | 24.1 | 35.1 | |
Urine phosphorus (400–1200 mg/24 h) | 653.1 | 990.0 | 446.8 |
Urine creatinine (mg/dL) | 46.5 | 86.1 | |
Urine creatinine (1.0–1.8 g/24 h) | 1.3 | 1.7 | 1.1 |
Calculated TmP/GFR (2.5–4.2 mg/dL) | 1.3 | 0.8 | 1.4 |