RT Journal T1 RAdiological case of the month JF Archives of Pediatrics & Adolescent Medicine JO Archives of Pediatrics & Adolescent Medicine YR 1999 FD April 1 VO 153 IS 4 SP 423 OP 424 DO UL http://dx.doi.org/ AB On initial presentation, blood, urine, and cerebrospinal fluid cultures were obtained. A urinalysis revealed microscopic hematuria and proteinuria. Further laboratory evaluation was notable for the following levels: serum sodium,155 mmol/L; serum urea nitrogen, 21.8 mmol/L (7.8 mg/dL); serum creatinine, 424.3 µmol/L (4.8 mg/dL); fractional excretion of sodium, 4.6%; and serum uric acid, 1118.2 mmol/L. Results of a complete blood cell count were normal.