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Table 1 Laboratory data on admission

From: Acquired Fanconi syndrome in patients with Legionella pneumonia

  Normal range Patient 1 Patient 2
BUN 8–22 mg/dL 17 41
Serum creatinine 0.71–1.20 mg/dL 0.88 2.23
Serum sodium 136–147 mEq/L 121 143
Serum potassium 3.6–5.0 mEq/L 3.4 3.5
Serum phosphorus 2.5–4.3 mg/dL 1.3 2.0
Serum uric acid < 7.0 mg/dL 2.4 2.7
Serum chloride 101–109 mEq/L 83 107
Serum CPK 56–244 IU/L 670 2,330
Bicarbonate 22.0–26.0 mEq/L 20.8 15.7
Anion gap 12 ± 2 mEq/L 15.2 20.3
Serum osmolarity 285–295 mOsm/kg 255 N.D.
Urinary osmolarity mOsm/kg 673 N.D.
ADH 0.3–4.2 pg/mL 1.7 N.D.
Proteinuria Negative; (−) (2+) (2+)
Leukocyturia Negative; (−) (−) (−)
Urinary pH 4.8–7.5 6.5 5.5
Urinary glucose Negative; (−) (3+) (2+)
Urinary RBC 0–4/HPF 10–19/HPF 10–19/HPF
%TRP 81–90% 54.0 51.0
FEK 10.0–20.0% 18.4 33.1
FEUA 5.5–11.0% 18.7 42.8
β2-MG < 250 μg/L 80,397 110,556
NAG < 7.0 U/L 18.0 19.7
  1. Definition of the abbreviations: ADH antidiuretic hormone, BUN blood urea nitrogen, CPK creatine phosphokinase, FEK fractional excretion of potassium, FEUA fractional excretion of uric acid, HPF high power field, NAG N-acetyl-β-D-glucosaminidase, N.D. not determined, RBC red blood cell, %TRP tubular reabsorption of phosphate, WBC white blood cell, β2-MG β2-microglobulin. Conversion factors for units: BUN in mg/dL to mmol/L, × 0.357, creatinine in mg/dL to mmol/L, × 88.4, phosphorus in mg/dL to mmol/L, × 0.3229, uric acid in mg/dL to μmol/L, × 59.48, and ADH in pg/mL to pmol/L, × 0.923. No conversion is necessary for sodium, potassium, chloride, CPK, bicarbonate, anion gap, and osmolarity.