A post-dates infant was born with Apgars 1, 2, 5, and 7 and…

A post-dates infant was born with Apgars 1, 2, 5, and 7 and is currently receiving total body cooling for treatment of hypoxic ischemic encephalopathy. On DOL 3, the infant has had no urine output for 18 hours and the serum sodium is 125. What diagnosis do you suspect?