Fig. 2

Trend of urine output (blue) and serum sodium levels (red) through the post-op period. Initially, a phase of diuresis [U/O: 8 ml/kg/hr.; Sr Na⁺: 156 mEq/L] was followed by a phase of natriuresis and hyponatremia by the 10th post-operative day due to CSW disease [U/O: 9 ml/kg/hr.; Sr Na⁺: 127 mEq/L]. The final stage was permanent diabetes insipidus after waning of CSW disease. POD: Post-operative day, U/O: Urine output; Sr Na⁺: serum sodium level