Case Presentation: A 54-year-old woman with type 2 diabetes mellitus with hyperglycemia and hypertension presented to our hospital with new fevers, nausea, vomiting.Four days prior, the patient was found to have a diabetic foot infection and started on trimethoprim/sulfamethoxazole (TMP-SMX) and metronidazole as an outpatient. At this time, her sodium was 133, corrected to 139 [...]

Case Presentation: A 59-year-old female with recently diagnosed perihilar lung mass and liver lesions presented for evaluation of painless jaundice and transaminitis. Initial laboratory studies revealed a sodium of 129 mOsm/kg, elevated bilirubin, alkaline phosphatase, lipase, and liver enzymes. Initial hyponatremia workup showed a serum osmolality of 279 mOsm/kg, urine osmolality of 118 mOsm/kg, and [...]